PROSPECTUS
                                                             File No. 333-104671
                                                Filed pursuant to Rule 424(b)(1)


                                    3,819,570

                               THERMOGENESIS CORP.

                                  Common Stock


     All of the shares of common stock of THERMOGENESIS  CORP. offered are being
sold by the selling stockholders listed in this Prospectus.  Of the shares being
sold by the  selling  stockholders,  up to 11,976  shares may be resold upon the
exercise of outstanding warrants. The common stock and warrants were issued in a
private placement completed in March 2003. We will not receive any proceeds from
the resale of any common stock by the selling stockholders.

     Our common stock is traded and listed on The Nasdaq SmallCap Market,  under
the  symbol  "KOOL." On April 16,  2003,  the last  reported  sale price for the
common stock was $1.99. There is no market for the warrants.

     Our principle executive offices are located at 3146 Gold Camp Drive, Rancho
Cordova, California 95670. Our telephone number is (916) 858-5100.


          INVESTING IN OUR COMMON STOCK INVOLVES A HIGH DEGREE OF RISK.
                          SEE "RISK FACTORS" AT PAGE 3.
                         -------------------------------

NEITHER  THE  SECURITIES  AND  EXCHANGE  COMMISSION  NOR  ANY  STATE  SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THE COMMON STOCK OR DETERMINED IF THIS
PROSPECTUS  IS TRUTHFUL OR  COMPLETE.  ANY  REPRESENTATION  TO THE CONTRARY IS A
CRIMINAL OFFENSE.






                  The date of this Prospectus is April 30, 2003






                                Table of Contents

Part  I                                                                     Page
-------                                                                     ----

Prospectus Summary............................................................1
Risk Factors..................................................................3
Summary Financial Information.................................................8
Company Background............................................................9
Summary of Offering..........................................................11
Use of Proceeds..............................................................11
Plan of Distribution.........................................................11
Selling Stockholders.........................................................12
Indemnification of Directors and Officers....................................14
Transfer Agent...............................................................14
Experts......................................................................14
Legal Matters................................................................15
Where Can You Find More Information..........................................15
Glossary of Certain Technical Terms..........................................17







                               PROSPECTUS SUMMARY

     This  Prospectus  contains or  incorporates  "forward-looking  statements,"
which include statements about our business strategy,  our growth strategy,  our
product  development  and  marketing  efforts,  and  anticipated  trends  in our
business,   which  are  not  historical  facts.  We  may  also  make  additional
forward-looking  statements  from time to time in filings  that we make with the
Securities and Exchange Commission.  When we use words like "believe," "expect,"
"anticipate," "project," and similar expressions, this should alert you that the
statement is  forward-looking.  Forward-looking  statements speak only as of the
date made,  based  largely on  expectations.  These  expectations  are generally
subject  to a number  of  risks  and  uncertainties,  some of  which  cannot  be
predicted or  quantified,  and which are beyond our control.  Future  events and
actual results may differ materially from the anticipated  results expressed in,
contemplated  by, or underlying our  forward-looking  statements.  Statements in
this  Prospectus,   and  in  documents   incorporated  by  reference  into  this
Prospectus,  including  those set forth in the caption "Risk  Factors"  describe
factors,  among others, that could contribute to or cause differences.  In light
of these  risks  and  uncertainties,  we  cannot  give any  assurances  that the
forward-looking  information  will in fact  transpire or prove to be accurate in
the future.

Our Business

     We are a leading developer and manufacturer of micro-manufacturing  systems
consisting of compact robotic devices or automated devices and companion sterile
single-use  disposables  that our customers use to produce products sourced from
single units of blood.  These  biological  products include  hematopoietic  stem
cells for bone marrow rescue  transplants  and blood derived  proteins to assist
surgeons in arresting bleeding or gluing tissues.  Our technology  platforms are
designed to micro-manufacture  biopharmaceutical drugs from a single donation of
blood, in contrast to the manufacture of  biopharmaceutical  drugs using "pools"
of blood from thousands of donors or by using expensive technology.

Our Strategy

     Our strategy to take advantage of our market opportunity includes:

o    Utilizing   our   expertise   in   the   areas   of    thermodynamics   and
     cryopreservation;

o    Developing new products through platform designs to build new products with
     only a small incremental research and development investment;

o    Become  the  leader  in  the  design, development, manufacture, and sale of
     medical  devices  and  disposables for our customers to "micro-manufacture"
     therapeutically valuable biological products from an autologous or directed
     single donor unit of blood to reduce or eliminate contamination and risk of
     infection to the recipient;


o    Develop  disposable  products  that  are  used  with  our platform designed
     products to provide a recurrent stream of revenue; and

o    Create awareness of the medical advantages of biological products processed
     or stored in our products.

Risk Factors

For a  discussion  of  considerations  relevant to an  investment  in our common
stock, see the section entitled "RISK FACTORS" beginning on page 3.

The Offering

Common Stock Outstanding Before the Offering..........................35,301,499
Common Stock Offered by Selling Stockholders (a)....................3,819,570(a)
Common Stock Outstanding After the Offering (a).......................39,121,069
Nasdaq SmallCap Symbol......................................................KOOL

     (a)      Assumes  that warrant  holders have  exercised  their  warrants to
purchase 11,976 shares of common stock in the aggregate. The number of shares of
common  stock that is being  registered  by this  registration  statement is the
total  number of shares of common  stock and shares of common  stock that may be
issued upon the exercise of warrants.

Use of Proceeds

We will not receive any proceeds from the resale of common shares by the Selling
Stockholders.  We will  receive  proceeds if certain  outstanding  warrants  are
exercised.  Any proceeds  from the exercise of warrants will be used for working
capital.



                                  RISK FACTORS

     An  investment  in our common stock  involves a number of very  significant
risks.  Because  of  these  risks,  only  persons  able to bear  the risk of and
withstand the loss of their entire investment should invest in our common stock.
Prospective  investors  should also  consider  the  following  before  making an
investment decision.

We Have  Incurred Net Losses since Our  Inception and Expect Losses to Continue.
Except for net income of $11,246 for fiscal  1994,  we have not been  profitable
since our inception.  For the fiscal year ended June 30, 2002, we had a net loss
of $5,038,000, and an accumulated deficit at June 30, 2002, of $49,110,000.  The
report  of  independent  auditors  on our June 30,  2002,  financial  statements
includes an explanatory  paragraph  indicating there is substantial  doubt about
our ability to continue as a going  concern.  Although we are  executing  on our
business plan to market launch new products,  continuing  losses will impair our
ability to fully meet our  objectives  for new  product  sales and will  further
impair our  ability to meet  continuing  operating  expenses  that may result in
staff reductions and curtailment of clinical trials currently planned.  See Risk
Factor  entitled " If We Are Unable to Raise  Funds Our Growth May Be  Adversely
Affected" below.

If We  Are  Unable  to  Raise  Funds  Our  Growth  May  Be  Adversely  Affected.
Historically,  we have had to seek capital for our growth and  operations due to
lack of  revenues.  Based on net  proceeds of  approximately  $5.2  million (See
"Recent Financing" on page 11) received in our most recent private placement, we
believe we will have  sufficient  working capital to fund our operations for the
next  twelve  to  eighteen  months.   However,  if  actual  sales  do  not  meet
expectations  or  marketing,   production  and  clinical  trial  costs  increase
significantly,  we will need additional  financing to complete and implement our
long-term   business   objectives.   Further,   delays  in  obtaining   required
governmental  clearances  for,  or  additional  testing  requirements  prior to,
marketing our new products will result in decreased revenues and increased costs
that may require us to seek additional  financing.  In the event that there is a
cash shortage and we are unable to obtain a debt  financing,  additional  equity
financing  will be required which will have the effect of diluting the ownership
of existing stockholders.

We Have  Limited  Testing  Data and  Must  Complete  Phase  III  Clinical  Trial
Successfully  in Order to Gain  Food and Drug  Administration  ("FDA")  Approval
Required to Market our  CryoSeal(R)  Fibrin Sealant System in the United States.
The  Company  has  completed  the pilot  study and  certain in vitro and in vivo
testing of its CryoSeal FS System, and has begun the pivotal trial in the United
States.  Other in vitro studies have occurred with the BioArchive(R)  System and
stem cell units  processed with the BioArchive  products have been  transplanted
successfully  into  humans.  While  these  studies  provide  a basis to  achieve
regulatory  permission to promote these systems for some of the indications that
management believes can be achieved,  they do not provide a basis to achieve all
of the  indications.  Further  clinical  studies  must be  performed  for future
indications.  There  can  be no  assurance  that  the  clinical  studies  can be
successfully  completed within the Company's  expected time frame and budget, or
that the  Company's  products  will prove  effective  in the  required  clinical
trials. If the Company is unable to conclude successfully the clinical trials of



its products in development,  the Company's  business,  financial  condition and
results of operations could be adversely affected.

Our Failure to Develop New Products  Will  Adversely  Effect Our Future  Growth.
Historically,  substantially all of our sales have been from products related to
freezing, thawing and storing of blood plasma. Because we expect this segment of
the blood plasma market to have limited growth  potential,  new products for the
biotechnology  market will have to be  successfully  developed  and marketed for
future growth.  We are currently focused on developing and marketing novel blood
processing  systems such as the CryoSeal FS System for the automated  production
of autologous or allogeneic blood components used as a fibrin sealant.  Although
this product uses technology related to our core competence,  it also represents
a departure  from our former core blood plasma  business.  Further,  although we
have had discussions  with experts in areas of application for this product,  it
is still in its  development  and/or initial  market phase.  No assurance can be
given that potential products can be successfully  developed,  and if developed,
that a market will also develop for them.

If We Fail to Maintain Our Listing, Liquidity of the Company's Stockholders Will
Be Adversely  Affected.  The Nasdaq SmallCap Market on which our common stock is
traded has established  certain  maintenance  listing  requirements that must be
satisfied in order for a company's  shares to continue to be listed.  Currently,
our  common  stock  meets  the  Nasdaq  SmallCap  Market   maintenance   listing
requirements.  However,  if we  continue  to incur  losses,  this may affect our
ability to meet the stockholders'  equity of $2.5 million requirement or minimum
Bid Price of $1 per share  requirement as set by the Nasdaq SmallCap Market.  We
cannot  assure  that we will always be able to meet the Nasdaq  SmallCap  Market
listing  in the  future.  Failure  to meet the Nasdaq  SmallCap  Market  listing
requirements  could result in the  delisting of our common stock from the Nasdaq
SmallCap Market which may adversely affect the liquidity of our shares.

Our Business is Heavily  Regulated,  Resulting in Increased  Costs of Operations
and Delays in Product Sales.  Most of our products  require FDA approval to sell
in the U.S.  and will require  clearance  from  comparable  agencies to sell our
products in foreign  countries.  These  clearances may limit the U.S. or foreign
market in which our products may be sold or circumscribe  applications  for U.S.
or foreign  markets  in which our  products  may be sold.  The  majority  of our
products  related to freezing  blood  components  are currently  exempt from the
requirement  to  file  a  510(k)  pre-market  application.  These  products  are
currently   marketed  and  sold  worldwide.   Further,   our  products  must  be
manufactured  under  principals of our quality system for continued  Certificate
European  (CE)  marking  that allows our  products  to be  marketed  and sold in
Europe,  which are similar to the quality system regulations of both the FDA and
California  Department of Health.  Failure to comply with those  quality  system
requirements  and  regulations  may subject the Company to delays in  production
while  it  corrects  any  deficiency  found by  either  the  FDA,  the  State of
California  or the  Company's  notifying  European  body during any audit of our
quality system. With limited working capital and resources there is no assurance
that we will not be found to be out of compliance,  resulting in warning letters
or,  in  worst   case,   temporary   shut  down  of   manufacturing   while  the
non-conformances are rectified.


Influence By the Government and Insurance  Companies May Adversely  Impact Sales
of Our Products.  Our business may be materially  affected by continuing efforts
by government, third party payers such as medicare, medicaid, and private health
insurance  plans,  to reduce the costs of  healthcare.  For example,  in certain
foreign  markets the pricing and profit margins of certain  healthcare  products
are subject to government controls. In addition,  increasing emphasis on managed
care in the U.S.  will  continue to place  pressure on the pricing of healthcare
products. As a result,  continuing effort to contain healthcare costs may result
in reduced sales or price reductions for our products. To date, we are not aware
of any direct  impact on our  pricing or  product  sales due to such  efforts by
governments to contain  healthcare  costs and we do not anticipate any immediate
impact in the near future.

Our Inability to Protect Our Patents,  Trademarks and Other  Proprietary  Rights
could Adversely  Impact Our Competitive  Position.  We believe that our patents,
trademarks  and other  proprietary  rights are  important to our success and our
competitive  position.  Accordingly,  we  devote  substantial  resources  to the
establishment and protection of our patents,  trademarks and proprietary rights.
We currently hold patents for products,  and have patents pending for additional
products that we market or intend to market.  However,  our actions to establish
and  protect  our  patents,  trademarks,  and other  proprietary  rights  may be
inadequate to prevent  imitation of our products by others or to prevent  others
from claiming  violations of their  trademarks and proprietary  rights by us. If
our products are challenged as infringing upon patents of other parties, we will
be required to modify the design of the product,  obtain a license,  or litigate
the issue, all of which may have an adverse business effect on us.

Failure to Protect Our Trade Secrets May Assist Our Competitors.  We use various
methods,  including  the  use  of  confidentiality  agreements  with  employees,
vendors,  and customers,  to protect our trade secrets and proprietary  know-how
for our products.  However, such methods may not provide complete protection and
there  can be no  assurance  that  others  will  not  obtain  our  know-how,  or
independently  develop the same or similar  technology.  We prepare and file for
patent protection on aspects of our technology which we think will be integrated
into final  products  early in design  phases,  thereby  limiting the  potential
risks.

Competition  in Our Industry is Intense and Will Likely  Involve  Companies With
Greater  Resources  Than We Have. We hope to develop a competitive  advantage in
the medical  applications of our products,  but there are many  competitors that
are  substantially  larger  and who  possess  greater  financial  resources  and
personnel than we have. Our current principal market is the users of ultra-rapid
blood  plasma  freezing and thawing  equipment.  There are  companies  that sell
freezers  to the blood  plasma  freezing  industry  which are larger and possess
greater  financial and other  resources than we do. The CryoSeal System may face
competition  from major  biological  product  manufacturers  that currently sell
fibrin glue  sourced  from  pooled  plasma  outside the U.S.  With regard to the
BioArchive   System,   numerous  larger  and   better-financed   medical  device
manufacturers may choose to enter this market as it develops.

We Have a Limited Marketing and Sales Force for New Products Which May Delay Our
Goal of Increased Sales Levels.  We currently sell our existing  medical devices
through a direct sales and marketing force and our foreign distribution network.
Although we have entered into exclusive distribution  agreements for the area of
the two new platform products and we continue to seek strategic partners,  there
are no assurances that the distributors  will produce  significant  sales of the
systems.


Our Lack of Production  Experience May Delay Producing Our New Products. We have
manufactured our blood plasma thawers and freezers that are less technologically
sophisticated products since our inception and the BioArchive System since 1998.
Although  we have  redesigned  our  manufacturing  facility to  accommodate  the
BioArchive System and the CryoSeal System, we do not have significant experience
in manufacturing the CryoSeal System or in the manufacture of disposables. There
can be no assurance that our current resources and manufacturing  facility could
handle a significant  increase in orders for either the BioArchive System or the
CryoSeal  System.  If we are unable to meet demand for sales of the new systems,
we  would  need to train  additional  personnel  or  contract  with  third-party
manufacturers  for  the  backlog,  and no  assurances  can  be  made  that  such
third-party  manufacturers can be retained, or retained on terms favorable to us
and our pricing of the  equipment.  Inability to have products  manufactured  by
third parties at a  competitive  price will erode  anticipated  margins for such
products, and negatively impact our profitability.

Our New Products  Are at Initial  Market  Introduction,  and We Are Not Sure the
Market Will Accept  Them.  The market  acceptance  of our  CryoSeal  System will
depend upon the medical community and third-party  payers accepting the products
as  clinically  useful,  reliable,  accurate,  and cost  effective  compared  to
existing and future products or procedures.  Market  acceptance will also depend
on our  ability  to  adequately  train  technicians  on how to use the  CryoSeal
System. Even if our new product systems are clinically adopted,  the use may not
be  recommended  by  the  medical  profession  or  hospitals  unless  acceptable
reimbursement  from health care and third party payers is available.  Failure to
achieve  significant  market share could have  material  adverse  effects on our
long-term business, financial condition and results of operation.

Failure to Keep Our Key Personnel May Adversely  Affect Our Operations.  Failure
to retain  skilled  personnel  could hinder our  operations.  Our future success
partially  depends  upon the  continued  services  of key  technical  and senior
management personnel.  Our future success also depends on our continuing ability
to attract,  retain and  motivate  highly  qualified  managerial  and  technical
personnel.  The inability to retain or attract qualified  personnel could have a
significant  negative  effect upon our efforts and thereby  materially  harm our
business and financial  condition.  We have entered into  employment  agreements
with each member of our senior management.  Specifically,  we are dependent upon
the  experience and services of Philip H. Coelho,  Chairman and Chief  Executive
Officer.  We have  obtained key man life  insurance  covering Mr.  Coelho in the
amount of $2,000,000 as some protection against the risk.

Product  Liability  and  Uninsured  Risks May  Adversely  Affect the  Continuing
Operations.  We may be liable if any of our products cause injury,  illness,  or
death.  We also may be required to recall  certain of our  products  should they
become  damaged  or if they are  defective.  We are not  aware  of any  material
product  liability  claim against us. Further,  we maintain a general  liability
policy that includes product liability coverage of $1,000,000 per occurrence and
$2,000,000 per year in the aggregate. However, a product liability claim against
us could have a material adverse effect on our business or financial condition.


Dependence  on  Suppliers  for  Custom  Components  May  Impact  the  Production
Schedule. The Company obtains certain custom components from a limited number of
suppliers.  If the supplier  raises the price of the  component or  discontinues
production,  the Company will have to find another qualified supplier to provide
the  component.  In the event that it becomes  necessary  for us to find another
supplier,  we would first be required to qualify the quality  assurance  systems
and  product  of that  alternative  supplier.  Any  transfer  between  qualified
suppliers may impact the production  schedule,  thus delaying revenues,  and may
cause the price of the key components to increase.





                          SUMMARY FINANCIAL INFORMATION

     The following table contains summary information derived from the financial
statements  included  in our Annual  Report on Form 10-K for the year ended June
30,  2002 and  Quarterly  Report on Form  10-Q for the  quarterly  period  ended
December  31, 2002,  incorporated  by  reference  herein,  and should be read in
conjunction with those financial statements and the related notes thereto.


                                                                                      

                                                                                   For the Six Months Ended
                                               For the Year Ended June 30,               December 31,
                                               ---------------------------               ------------
                                            2000          2001          2002          2001          2002
                                            ----          ----          ----          ----          ----

Statement of Operations Data:

Revenues                                    $4,211,000    $5,792,000    $9,549,000    $3,984,000    $4,403,000

Cost of revenues                            $4,246,000    $5,012,000    $7,558,000    $3,110,000    $3,635,000

Operating expenses                          $5,819,000    $5,671,000    $7,126,000    $3,305,000    $3,757,000

Net loss before cumulative effect
  of accounting change under
  SAB 101                                  $(5,818,000)  $(5,871,000)  $(5,038,000)  $(2,368,000)  $(2,946,000)

Cumulative effect of accounting
  change under SAB 101                          -         $ (282,000)        -             -             -

Net loss                                   $(5,818,000)  $(6,153,000)  $(5,038,000)  $(2,368,000)  $(2,946,000)

Per Share Data

Net loss before preferred stock
  dividend or discount and
  cumulative effect of accounting          $(5,818,000)  $(6,153,000)  $(5,038,000)  $(2,368,000)  $(2,946,000)
  change under EITF 00-27

Preferred stock dividend or
  discount                                  $ (905,000)   $ (100,000)        -             -             -

Cumulative effect of accounting
  change under EITF 00-27                       -         $ (580,000)        -             -             -

Net loss to common
  stockholders                             $(6,723,000)  $(6,833,000)  $(5,038,000)  $(2,368,000)  $(2,946,000)

Basic and diluted net loss per
  share before cumulative effect
  of accounting changes                    $     (0.30)  $     (0.22)  $     (0.15)  $     (0.07)  $     (0.08)

Cumulative effect of accounting
  change under SAB 101                          -        $     (0.01)        -             -             -




Cumulative effect of accounting
  change under EITF 00-27                       -        $     (0.02)        -             -             -

Basic and diluted net loss per
  common share                             $     (0.30)  $     (0.25)  $     (0.15)  $     (0.07)  $     (0.08)

Shares used in computing per
  share data                                22,288,912    27,668,523    32,844,292    31,704,492    35,265,837

Pro Forma amounts assuming
 the accounting change under
 SAB 101 is applied
 retroactively:
   Net loss to common                      $(6,299,000)  $(6,551,000)  $(5,038,000)  $(2,368,000)  $(2,946,000)
    stockholders
   Basic and diluted net loss              $     (0.28)  $     (0.24)  $     (0.15)  $     (0.07)  $     (0.08)
    per share





                                                                     

                                           June 30,                  December 31,
                                           --------                  ------------
                                      2001          2002           2001         2002
                                      ----          ----           ----         ----

Selected Balance Sheet Data:

Working Capital                      $7,098,000    $ 9,631,000    $4,878,000   $6,773,000

Total Assets                         $9,553,000    $12,239,000    $7,724,000   $9,642,000

Total Liabilities                    $1,621,000    $ 2,046,000    $2,147,000   $2,355,000

Stockholders' Equity                 $7,932,000    $10,193,000    $5,577,000   $7,287,000


                               THERMOGENESIS CORP.

     We  design,   manufacture   and  distribute   micro-manufacturing   systems
consisting of compact robotic devices or automated devices and companion sterile
single-use  disposables  that our customers use to produce products sourced from
single units of blood.  These  biological  products include  hematopoietic  stem
cells for bone marrow rescue  transplants  and blood derived  proteins to assist
surgeons in arresting bleeding or bonding tissues. The Company completed two new
technology platforms  (BioArchive System and the CryoSeal System), each of which
is designed to produce multiple biological products targeted at serious diseases
and surgical  applications.  These two  technology  platforms  are viewed by the
Company  as  micro-manufacturing   systems,  that  utilize  single  use  sterile
disposable  containers to produce  biological  products  composed of stem cells,
proteins,  enzymes or growth factors with potential therapeutic applications for
treatment of serious human  disease.  Currently,  we are  manufacturing  several



categories of  thermodynamic  devices that are being sold under FDA clearance to
market in the United States. We continue to sell Thermoline(TM)  Plasma Freezers
and Thawers.  Other  potential  markets for our proprietary  technology  include
surgical, pharmaceutical and industrial applications.

     Our strategy has been to develop superior blood processing  devices for the
niche blood  processing  markets  where new  products  could  quickly  establish
credibility for our proprietary technology. We believe that by concentrating our
products to serve the blood plasma  industry,  many  customers,  such as the Red
Cross or other blood transfusion societies of various countries,  would validate
our  proprietary  technology for rapid freezing of biological  substances,  more
specifically  blood plasma.  Early products,  which received 510(k) clearance to
market,  are sold to blood banks and  hospitals  either  directly or through our
distribution network. See our "Annual Report on Form 10-K. -- Description of the
Business."

     We received CE Mark on the  CryoSeal(R)  Fibrin  Sealant  ("FS") System for
approval in the European community in March of 2001 and Canadian approval in May
of 2001, thus allowing  commercialization  activities of the CryoSeal FS System,
which produces and dispenses a  two-component  fibrinogen and  fibronectin  rich
protein "glue," to begin in each of these markets. In the U.S., in July 2002, an
independent  Data Safety  Monitoring  Board ("DSMB"),  comprised of surgeons,  a
bio-statistician and an ethicist,  recommended  proceeding with the multi-center
pivotal trial for the CryoSeal FS System.  The DSMB  recommendation  is based on
the demonstrated  safety of the pilot study data from patients  undergoing liver
resections.  As a result  of this  recommendation,  the  Company  is  finalizing
agreements with various hospitals with large liver resection  practices who will
conduct the trials.  The  Company  also  continues  to support  Asahi  Medical's
efforts  in Japan to gain  approval  from the  Japanese  Ministry  of Health and
Welfare to begin human clinical trials during the current fiscal year.

Our History

     Our core  expertise  lies in the  technical  fields of  thermodynamics  and
cryopreservation,  technologies  that we initially applied to the development of
ultra-rapid freezers and thawers,  which are currently being sold to blood banks
and hospitals in countries  throughout  the world.  Until the fourth  quarter of
fiscal year 1998, our revenues had been principally derived from these products.
Following four years of intensive research and development, we began shipping in
the  second  quarter of fiscal  year 1998 our new  platform  product  called the
BioArchive System.

     We are  incorporated  in Delaware and our principal  executive  offices are
located  at 3146 Gold  Camp  Drive,  Rancho  Cordova,  California  95670 and our
telephone number is (916) 858-5100.



Recent Financing

     In March 2003,  we completed a private  placement  of  3,807,594  shares of
common stock, raising an aggregate of $5,834,000, before placement agent fees of
7% of gross proceeds and expenses of the offering.  Warrants to purchase  11,976
shares of common stock at an exercise price of $2.39 per share were also issued.
The net  proceeds  from  the  private  placement  are  being  used  to fund  the
completion  of the clinical  trials  through an  independent  Clinical  Research
Organization to support the Company's  claims for the CryoSeal FS System and for
general  working  capital.  Under the  terms of the  private  placement,  we are
required to register for resale the common shares and common  shares  underlying
the warrants.

                             SUMMARY OF THE OFFERING

     We are  registering  3,819,570  shares  of common  stock for  resale by the
selling  stockholders  of which 11,976 shares may be issued upon the exercise of
warrants.

                                 USE OF PROCEEDS

     We will  receive no proceeds  from the resale of the shares of common stock
by the selling stockholders.  We will, however,  receive proceeds if the selling
stockholders  exercise their warrants.  Those proceeds, if any, will be used for
general working capital.

                              PLAN OF DISTRIBUTION

     The selling  stockholders,  their  pledgees,  donees,  transferees or other
successors  in interest may from time to time offer and sell all or a portion of
the  shares in  transactions  on the  Nasdaq  SmallCap  Market,  or on any other
securities  exchange or market on which the common stock is listed or traded, in
negotiated  transactions  or otherwise,  at prices then prevailing or related to
the then-current market price or at negotiated prices. The selling  stockholders
or their pledgees, donees, transferees, or other successors in interest may sell
their shares directly or through agents or broker-dealers acting as principal or
agent,  or in  block  trades  or  pursuant  to a  distribution  by one  or  more
underwriters on a firm commitment or best-efforts basis. To the extent required,
the names of any agent or broker-dealer and applicable  commissions or discounts
and any other required  information with respect to any particular offer will be
set  forth  in an  accompanying  Prospectus  supplement.  Each  of  the  selling
stockholders  and their  pledgees,  donees,  transferees or other  successors in
interest  reserves  the  right to  accept or  reject,  in whole or in part,  any
proposed purchase of the shares to be made directly or through agents.

     In connection with distributions of the shares, any selling stockholder may
enter into hedging  transactions with  broker-dealers and the broker-dealers may
engage in short sales of the shares in the course of hedging the positions  they
assume with the selling  stockholder.  Any selling stockholder also may sell the
shares  short and  deliver  the  shares to close out such short  positions.  Any
selling  stockholder  also may enter  into  options or other  transactions  with
broker-dealers  that involve the  delivery of the shares to the  broker-dealers,
which may then resell or otherwise transfer such shares. Any selling stockholder
also may loan or pledge the shares to a broker-dealer  and the broker-dealer may



sell the shares so loaned or upon a default may sell or  otherwise  transfer the
pledged shares.

     The  selling  stockholders,   any  agents,  dealers  or  underwriters  that
participate with the selling  stockholders in the resale of the shares of common
stock and the pledgees,  donees,  transferees or other successors in interest of
the selling  stockholders may be deemed to be "underwriters"  within the meaning
of the Securities  Act, in which case any  commissions  received by such agents,
dealers or underwriters and a profit on the resale of the shares of common stock
purchased by them may be deemed underwriting  commissions or discounts under the
Securities Act.

     There is no assurance that the selling stockholders will sell any or all of
the shares.

     Pursuant  to  registration  rights  agreements  between us and the  selling
stockholders,  we have  agreed to pay all  expenses  of the  Company and selling
stockholders  incurred in the  registration  of the shares other than  brokerage
commissions incurred by the selling stockholders.

     In addition  to selling  their  common  stock  under this  Prospectus,  the
selling stockholders may:

     o transfer their common stock in other ways not involving  market makers or
established trading markets, including by gift, distribution, or other transfer;
or

     o sell their common stock under Rule 144 of the Securities Act.

                              SELLING STOCKHOLDERS

     The following table  identifies the selling  stockholders,  as of March 28,
2003,  and  indicates  certain  information  known to us with respect to (i) the
number of shares of common  stock  held by the  selling  stockholders,  (ii) the
amount to be offered for the selling stockholders' account, and (iii) the number
of shares and  percentage of  outstanding  shares of common stock to be owned by
the  selling  stockholders  after the sale of the  common  stock  offered by the
selling  stockholders.  The selling stockholders are not obligated to sell their
common stock offered by this Prospectus.

     The number of shares  listed under "Shares to be Sold" in the table assumes
that the selling  stockholders  have  exercised  their warrants into the maximum
number of  shares  currently  permitted  and will  sell all  common  shares in a
secondary offering pursuant to this Prospectus.

     Under the Exchange Act, any person engaged in a distribution  of the shares
of our common stock offered by this Prospectus may not simultaneously  engage in
market making  activities with respect to our common stock during the applicable
periods prior to the commencement of such distribution. In addition, and without
limiting the foregoing,  each selling  stockholder  may be subject to applicable



provisions  of the  Exchange  Act  and  the  rules  and  regulations  thereunder
including,  without limitation,  Regulation M. Further, the selling stockholders
may resell their shares pursuant to Rule 144.

     The warrants are not  registered  or listed for trading on the Nasdaq Stock
Market or on any exchange.

     Of the shares  shown as owned and  offered by the  stockholders  under this
Prospectus,  11,976 shares may be issued upon  exercise of warrants  acquired by
the selling stockholder from us in a private placement and resold.


                                                                                          

                                               Shares Owned Prior to                          Shares Owned
                                                     Offering(1)       Shares to be          After Offering
                                                     --------          -------------         --------------
                                                                           Sold

Name of Stockholder                                    Number             Number         Number     Percentage
-------------------                                    ------             ------         ------     ----------
INKA Kapitalanlagesellschaft mbH                      1,600,000         1,600,000             0         *
OXA Trade & Finance, Inc.                               100,000           100,000             0         *
Von Ernst Multi Funds Balanced Equity                   100,000           100,000             0         *
JAS Securities, LLC                                      98,039            98,039             0         *
TCMP3 Partners                                          163,400           163,400             0         *
MRT, L.P.                                                71,856(2)         71,856(2)          0         *
Clarion Capital Corporation                             470,629(3)        163,399       307,230         *
Ellis Enterprises                                        98,039            98,039             0         *
Alpha Capital                                           261,438           261,438             0         *
Deutsche Bank AG, London Branch                         500,000           500,000             0         *
P&V Assurances S.C.                                     500,000           500,000             0         *
Vertical Ventures Investments, LLC                      163,399           163,399             0         *


Footnotes to Table

*       Less than one percent.

(1)     Ownership includes options and warrants exercisable on or before May 30,
        2003.
(2)     Includes 11,976 shares issuable upon the exercise of warrants.
(3)     Includes  120,000  shares  issuable  upon  the  exercise of warrants and
        110,000 shares issuable upon the conversion of 22,000 shares of Series A
        Preferred Stock.


Relationship with Selling Stockholders

     None of the selling stockholders has had any material  relationship with us
within the past three years.

                    INDEMNIFICATION OF DIRECTORS AND OFFICERS

     Our Amended and Restated Certificate of Incorporation provides that we will
indemnify  directors and officers of the Company to the fullest extent permitted
by  Delaware  Law.  Further,  our bylaws  provide  authority  for the company to
maintain a liability insurance policy that insures directors or officers against
any liability incurred by them in serving for the Company.

     Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors,  officers and controlling  persons of the Company
pursuant to the foregoing provisions, or otherwise, we have been advised that in
the opinion of the Commission such  indemnification  is against public policy as
expressed in the Securities Act and is, therefore,  unenforceable.  In the event
that a claim  for  indemnification  against  such  liabilities  (other  than the
payment  by  us  of  expenses  incurred  or  paid  by a  director,  officer,  or
controlling person of the company in the successful defense of any action,  suit
or proceeding) is asserted by such  director,  officer or controlling  person in
connection with the securities being registered,  we will, unless in the opinion
of our counsel the matter has been settled by controlling precedent, submit to a
court of appropriate  jurisdiction the question whether such  indemnification is
against  public  policy as  expressed  in the Act and will be  governed by final
adjudication.

                                 TRANSFER AGENT

     The  transfer  agent for our common  stock is  Computershare  Transfer  and
Trust, 350 Indiana Street, Suite 800, Golden, Colorado 80401

                                     EXPERTS

     Ernst &  Young  LLP,  independent  auditors,  have  audited  our  financial
statements and schedule  included in our Annual Report on Form 10-K for the year
ended June 30, 2002, as set forth in their report (which contains an explanatory
paragraph describing conditions that raise substantial doubt about the Company's
ability to continue as a going  concern as described in Note 1 to the  financial
statements), which is incorporated by reference in this Prospectus and elsewhere
in the  registration  statement.  Our  financial  statements  and  schedule  are
incorporated  by reference in reliance on Ernst & Young LLP's  report,  given on
their authority as experts in accounting and auditing.


                                  LEGAL MATTERS

     The  validity  of the  shares  of  common  stock  offered  by  the  selling
stockholders  through this Prospectus will be passed upon for us by Bartel Eng &
Schroder. Mr. David Adams, a shareholder of Bartel Eng & Schroder,  beneficially
owns warrants to acquire 4,722 shares of common stock and owned outright  17,822
shares  of common  stock as of March 31,  2003  which  represents  less than one
percent of the total outstanding number of shares.

                       WHERE CAN YOU FIND MORE INFORMATION

     Government Filings. We file annual, quarterly and special reports and other
information with the Securities and Exchange  Commission.  You may read and copy
any document that we file at the Commission's Public Reference Room at 450 Fifth
Street, N.W., Room 1024, Washington,  D.C. 20549. Please call the Securities and
Exchange  Commission at  1-800-SEC-0330  for more  information  about the Public
Reference  Room. Most of our filings are also available to you free of charge at
the Securities and Exchange Commission's website at http://www.sec.gov.

     Stock Market.  Our common stock is listed on the Nasdaq SmallCap Market and
similar  information  can be inspected and copied at the offices of the National
Association of Securities Dealers, Inc., 1735 K Street, N.W.,  Washington,  D.C.
20006.

     Registration  Statement.  We have filed a registration  statement under the
Securities Act of 1933, as amended,  with the Securities and Exchange Commission
with  respect to the  common  stock  offered  under  this  Prospectus,  and this
Prospectus  is a part of  that  registration  statement.  However,  it does  not
contain all of the information  contained in the registration  statement and the
exhibits  filed  with  the  registration  statement.  You  should  refer  to the
registration statement and its exhibits for further information about us and the
common stock offered under this Prospectus.

     Information   Incorporated  by  Reference.   The  Securities  and  Exchange
Commission  rules and  regulations  allow us to  "incorporate  by reference" the
information that we file with the Securities and Exchange Commission. This means
that we can disclose  additional  important  information  to you by referring to
those documents.  The information incorporated by reference is an important part
of  this  Prospectus,  and  information  that we file  in the  future  with  the
Securities and Exchange Commission will automatically  update and supersede this
information.  We have filed the  following  documents  with the  Securities  and
Exchange  Commission  and  the  information  contained  in  those  documents  is
incorporated by reference into this Prospectus:

         (1)      Annual Report on Form 10-K for the year ended June 30, 2002;

         (2)      Quarterly Reports on Form 10-Q for the quarter ended September
                  30, 2002 and December 31, 2002;


         (3)      Current  Reports  on  Form 8-K for events dated March 21, 2003
                  and March 28, 2003;

         (4)      Proxy Statement for the Annual Meeting of Stockholders held on
                  January 30, 2003; and

         (5)      The description of our common stock contained in Form 8-A.

     Please  note that all other  documents  and reports  filed  under  Sections
13(a),  13(c),  14 or 15(d)  of the  Securities  and  Exchange  Act of 1934,  as
amended,  following the date of this  Prospectus and prior to the termination of
this  offering  will  be  deemed  to be  incorporated  by  reference  into  this
Prospectus  and  will be made a part of it from  the  date of  filing  with  the
Securities and Exchange Commission.

     ThermoGenesis  Corp.  Filings made with the SEC and other information about
the  Company  can be  found on our  website  at  www.thermogenesis.com.  We will
provide to each  person,  including  any  beneficial  owner,  who is delivered a
prospectus,  a copy of any of the documents that are  incorporated  by reference
free of charge. Send requests to Assistant Secretary,  ThermoGenesis Corp., 3146
Gold Camp Drive, Rancho Cordova, California 95670 or call (916) 858-5100.




                       GLOSSARY OF CERTAIN TECHNICAL TERMS


510(k):  formal  notification  to the Food and Drug  Administration  ("FDA")  by
manufacturers  of Class I devices  to obtain  clearance  to market  the  medical
device.  The device must be  substantially  equivalent  to devices  manufactured
prior to 1976.

ALLOGENEIC:  involving,  derived  from,  or  being  from  genetically  different
individuals of the same species, as obtaining blood from a single donor's plasma
for use in a patient.

AUTOLOGOUS:  autogenous; related to self; originating within an organism itself,
as obtaining blood from the patient for use in the same patient.

CRYOPRECIPITATE:  any precipitate (substance that is separated out of a solution
of plasma) that results from cooling, as cryoglobulin or antihemophilic factor.

CRYOPRESERVATION:  maintaining  the life of excised tissue or organs by freezing
and storing at very low temperatures.

CRYOSEAL: system for harvesting  fibrinogen-rich  cryoprecipitate from a donor's
blood plasma,  a blood  component that is currently  licensed by the FDA for the
treatment of clotting protein deficient patients.

FIBRINOGEN:  a blood  protein  that is  converted  to fibrin in the  clotting of
blood.