THERMOGENESIS CORP
S-3, 2000-01-21
LABORATORY APPARATUS & FURNITURE
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As filed with the Securities and Exchange
 Commission on January ___, 2000                     Registration No. 333-_____


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-3
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                               THERMOGENESIS CORP.
             (Exact name of the Company as specified in its charter)


           Delaware                                     94-3018487
- ---------------------------------       ---------------------------------------
(State or other jurisdiction or         (I.R.S. Employer Identification Number)
 incorporation or organization)

                              3146 Gold Camp Drive
                        Rancho Cordova, California 95670
                                 (916) 858-5100
          --------------------------------------------------------------
          (Address, including zip code, and telephone number, including
             area code, of registrant's principal executive offices)

                                Philip H. Coelho
                             Chief Executive Officer
                               THERMOGENESIS CORP.
                              3146 Gold Camp Drive
                            Rancho Cordova, CA 95670
                                 (916) 858-5100
       --------------------------------------------------------------------
       (Name, address, including zip code, and telephone number, including
                        area code, of agent for service)

                                   Copies to:

     David C. Adams, Esq.                           Daniel B. Eng, Esq.
       General Counsel                           BARTEL ENG LINN & SCHRODER
      THERMOGENESIS CORP.                       300 Capitol Mall, Suite 1100
      3146 Gold Camp Drive                           Sacramento, CA 95814
 Rancho Cordova, California 95670                       (916) 442-0400
        (916) 858-5110


Approximate date of commencement of the proposed sale to the public:  As soon as
practicable, and from time to time after the effective date of this Registration
Statement.

If the only securities  being registered on this Form are being offered pursuant
to dividend or interest reinvestment plans, please check the following box. [ ]

If any of the  securities  being  registered on this Form are to be offered on a
delayed or continuous  basis  pursuant to Rule 415 under the  Securities  Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]

If this Form is filed to register additional securities for an offering pursuant
to Rule 462(b) under the Securities Act, please check the following box and list
the  Securities  Act  registration  statement  number of the  earlier  effective
registration statement for the same offering. [ ]



<PAGE>ii


If this Form is a  post-effective  amendment filed pursuant to Rule 462(c) under
the  Securities  Act,  check  the  following  box and  list the  Securities  Act
registration  statement number of the earlier effective  registration  statement
for the same offering. [ ]

If delivery  of the  prospectus  is  expected  to be made  pursuant to Rule 434,
please check the following box. [ ]

<TABLE>
        <S>                                   <C>                <C>                  <C>                  <C>

                         CALCULATION OF REGISTRATION FEE


                                                                    Proposed maximum    Proposed maximum       Amount of
         Title of each class of securities        Amount to be      offering price     aggregate offering    registration
                  to be registered                 registered          per share              price              fee
        -------------------------------------  ------------------ -------------------- ------------------- ----------------

        Common Stock Underlying Series B
        Preferred Stock                             4,236,000 (1)         $2.96 (3)       $12,538,560           $3,311

        Common Stock Underlying Warrants              484,562 (2)         $2.73 (4)       $ 1,322,855           $  350

        Total                                       4,720,562                             $13,861,415           $3,661

</TABLE>


(1)  Represents  the maximum  number of shares of common stock issuable upon the
     conversion of the Series B preferred stock and offered for resale.

(2)  Represents  the  number  of  shares  of common  stock  offered  for  resale
     following  the exercise of warrants,  including  40,000  shares  underlying
     placement agent warrants.

(3)  Calculated in accordance with Rule 457(c) of the Securities Act of 1933, as
     amended  ("Securities Act").  Estimated for the sole purpose of calculating
     the  registration  fee and based upon the average of the high and low price
     per share of our common  stock on January  14,  2000,  as  reported  on the
     Nasdaq SmallCap Market.

(4)  Calculated in accordance with Rule 457(g) of the Securities Act.

The registrant hereby amends this  registration  statement on such date or dates
as may be necessary to delay its effective date until the registrant  shall file
a further amendment which specifically  states that this registration  statement
shall  thereafter  become  effective  in  accordance  with  Section  8(a) of the
Securities  Act of  1933  or  until  the  registration  statement  shall  become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.

<PAGE>1




Subject to Completion January ___, 2000                           PROSPECTUS


                                4,720,562 Shares

                               THERMOGENESIS CORP.

                                  Common Stock


All of the shares of common stock of THERMOGENESIS  CORP. offered are being sold
by selling  stockholders listed in this prospectus.  Of the shares being sold by
the  selling  stockholders,  up to  4,236,000  shares  may be  resold  upon  the
conversion of Series B convertible preferred stock, and up to 484,562 shares may
be resold upon the  exercise  of  outstanding  warrants.  The Series B preferred
stock and warrants were issued in private placements  completed in December 1999
and January 2000. 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 January 17, 2000, the last reported sale price for the common
stock was $2.97.  There is no market for either the Series B preferred  stock or
the warrants.



          INVESTING IN OUR COMMON STOCK INVOLVES A HIGH DEGREE OF RISK.
                          SEE "RISK FACTORS" AT PAGE 5.
                         -------------------------------

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 January ___, 2000.


<PAGE>2

                              AVAILABLE INFORMATION

We file annual,  quarterly,  and current reports,  proxy  statements,  and other
information with the Securities and Exchange  Commission.  You may read and copy
any reports, statements, or other information on file at the Commission's public
reference  room in Washington,  D.C. You can request copies of those  documents,
upon payment of a duplicating fee, by writing to the Commission.

We have filed a  registration  statement on Form S-3 with the  Commission.  This
prospectus,  which forms a part of that registration statement, does not contain
all information included in the registration  statement.  Certain information is
omitted and you should refer to the  registration  statement  and its  exhibits.
With  respect to  references  made in this  prospectus  to any contract or other
document of our company,  such references are not  necessarily  complete and you
should refer to the exhibits  attached to the registration  statement for copies
of the actual  contract or document.  You may review a copy of the  registration
statement,   including  exhibits,  and  other  reports,   statements,  or  other
information  that  we file  with  the  Commission,  at the  Commission's  public
reference room located at Room 1024,  Judiciary Plaza,  450 Fifth Street,  N.W.,
Washington,  D.C. 20549, and at the Commission's regional offices located at 500
West Madison  Street,  Suite 1400,  Chicago,  Illinois  60661 and at Seven World
Trade Center,  13th Floor,  New York,  New York 10048.  Copies of such material,
when  filed,  may also be  obtained  from the  Public  Reference  Section of the
Commission  at 450 Fifth  Street,  N.W.,  Washington,  D.C.  20549 at prescribed
rates.  Please call the Commission at 1-800-SEC-0330 for further  information on
the operation of the public  reference  rooms.  Our filings and the registration
statement  can  also be  reviewed  by  accessing  the  Commission's  website  at
http://www.sec.gov.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

The Commission  allows us to  "incorporate by reference" the information we file
with them,  which means that we can  disclose  important  information  to you by
referring you to those documents.  The information  incorporated by reference is
considered part of this prospectus,  and information that we file later with the
Commission  will  automatically  update and  supersede the  information  in this
prospectus.  We  incorporate  by reference  the  documents  listed below and any
future filings we make with the Commission  under Sections 13(a),  13(c), 14, or
15(d) of the Securities Exchange Act of 1934.

     (1)  Annual Report on Form 10-K for the year ended June 30, 1999;

     (2)  Quarterly  Report on Form 10-Q for the  quarter  ended  September  30,
          1999;

     (3)  Current Report on Form 8-K for the event dated December 22, 1999;

     (4)  Proxy  Statement  for  the  Annual  Meeting  of  Stockholders  held on
          December 10, 1999; and

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

Our Exchange Act file number is 0-16375. You may request a copy of these filings
at no cost, by writing or telephoning us at the following address: THERMOGENESIS
CORP.,  3146 Gold Camp  Drive,  Rancho  Cordova,  California  95670,  Attention:
Corporate Secretary; telephone (916) 858-5100.


<PAGE>3

                               PROSPECTUS SUMMARY


This is a summary of information  contained  elsewhere in this prospectus.  This
summary is not  complete  and does not contain all of the  information  that you
should consider before  investing in the common stock. You should carefully read
the entire prospectus,  including the documents and information  incorporated by
reference into it. This prospectus contains forward-looking  statements that are
subject  to risks and  uncertainties,  such as our  products  being  subject  to
regulatory  approvals,  market acceptance of new  technologies,  and other risks
detailed in the section  entitled  "Risk  Factors"  and in our Annual  Report as
filed with the Commission. A glossary of certain technical terms used is located
at the back of this prospectus.

Our Business

We are a leading  developer  and  manufacturer  of  micro-manufacturing  systems
designed to harvest biopharmaceutical drugs from blood.  Biopharmaceutical drugs
utilize  the body's  naturally  occurring  proteins,  enzymes,  growth  factors,
hormones,  and  progenitor  cells  for  the  treatment  of  human  disease.  Our
technology platforms are designed to micro-manufacture  biopharmaceutical  drugs
from  a  single   donation  of  blood,   in  contrast  to  the   manufacture  of
biopharmaceutical  drugs by using "pools" of blood from thousands of donors,  or
by using expensive recombinant technology.

In February of 1999,  following FDA 510(k)  clearance of the CryoSeal AHF System
which     micro-manufactures     cryoprecipitated     anti-hemophilic    factors
(Cryoprecipitated AHF) from single units of plasma for the intravenous treatment
of  hemophiliacs,  we  prepared to initiate  clinical  trials for an  autologous
fibrin  glue  (AFG)  indication  for the  CryoSeal  Platform  technology.  These
activities included:  hiring C L McIntosh as the Clinical Research  Organization
to lead the clinical  trial effort and preparing the initial draft of a clinical
protocol for an I.D.E. approved pivotal trial utilizing the Company's autologous
fibrin glue as a hemostatic agent in liver resectioning surgery; selecting sites
and site  investigators;  forming a steering  committee of physicians and a data
monitoring  safety board;  and beginning  preparation  for  pre-clinical  animal
studies and final design  review for the product.  For further  discussion,  see
"Annual Report on Form 10-K -- Business."

Our Strategy

Our strategy to exploit our market opportunity includes the following:

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

o    Develop 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 which produce biopharmaceutical drugs from an autologous or
     directed  single donor unit of blood to reduce or  eliminate  contamination
     and risk of infection to the recipient; and

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

<PAGE>4

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 32 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(R)  System.  The BioArchive  System is a  computer-controlled  liquid
nitrogen    platform   with   dedicated    disposables   for   the   collection,
cryopreservation,  and  archive of blood and blood  components.  The  BioArchive
System is used  internationally and in the U.S. as part of a National Heart Lung
and Blood Institute study to process,  cryopreserve,  and archive  hematopoietic
stem and progenitor  cells sourced from  placental cord blood.  These stem cells
are then used to  reconstitute  the immune  system of  patients  suffering  from
leukemia,  lymphoma,  diverse inherited anemias, or hypoproliferative  stem cell
disorders.  We have entered into a period of rapid transformation as we begin to
manufacture and market micro-manufacturing  systems which may generate recurring
revenues from the ongoing sale of high margin blood processing disposables.

Our  strategy is to utilize our two new  technology  platforms - the  BioArchive
Platform  and  the   CryoSeal(TM)   Platform  -  as  the  basis  for  developing
micro-manufacturing  systems to  produce  biopharmaceutical  drugs  from  either
autologous  or  single-directed  donor  blood  which  will  compete in two major
medical  markets:  Wound Care and  Cellular  Therapy.  Currently  the Company is
aggressively  pursuing worldwide strategic partners in an effort to maximize the
value of its new technology platforms.

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.

                                  Risk Factors

For a  discussion  of  considerations  relevant to an  investment  in the common
stock, see the section entitled "RISK FACTORS" beginning on page 5.

<TABLE>
<S>                                                                                                       <C>

                                  The Offering

Common Stock Outstanding Before the Offering.............................................................21,188,262
Common Stock Offered by Selling Stockholders (a)..........................................................4,720,562
Common Stock Outstanding After the Offering (a)..........................................................25,908,824
Use of Proceeds................................................(we will not receive any proceeds from the offering)
Nasdaq SmallCap Symbol.........................................................................................KOOL

</TABLE>

(a)  Assumes that holders of Series B preferred stock have converted such shares
     into a maximum of  4,236,000  shares of common stock in the  aggregate  and
     that warrant  holders have  exercised  their  warrants to purchase  484,562
     shares of common stock in the aggregate.

<PAGE>5


                                  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 the common stock.  Prospective
investors  should  also  consider  the  following  before  making an  investment
decision.

Recurring Losses.  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, 1999, we
had a net loss of $6,098,904,  and an  accumulated  deficit at June 30, 1999, of
$30,745,189.  The report of independent auditors on our June 30, 1999, financial
statements  includes an explanatory  paragraph  indicating  there is substantial
doubt about our ability to continue  as a going  concern.  For the three  months
ended September 30, 1999, we had an unaudited net loss of $1,752,000.

Need for Additional Financing. Historically, we have had to seek capital for our
growth  and  operations   due  to  lack  of  revenues.   Based  on  proceeds  of
approximately  $4.0 million  received in our most recent private  placement,  we
believe  we will  have  sufficient  working  capital  for our 2000  fiscal  year
operations.  However, if actual sales do not meet expectations, or marketing and
production costs increase  significantly,  we will need additional  financing to
complete and implement our long-term  business  objectives.  Further,  delays in
obtaining required governmental approvals to, 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.  We are
attempting to obtain a bank line of credit  secured by our accounts  receivable.
However,  we cannot  guarantee  that we will be able to obtain a working line of
credit. In the event that there is a cash shortage and we are unable to obtain a
bank loan,  additional  equity  financing  will be required  which will have the
effect of diluting the ownership of existing shareholders.

Dependence on New Products for Future Growth. Historically, substantially all of
our sales have been from products related to the freezing,  thawing, and storing
of blood  plasma.  Because we expect this segment of the blood plasma  market to
have limited growth,  new products for the biotechnology  market will have to be
successfully developed and marketed for future growth. We are currently focusing
on developing and marketing novel  thermodynamic  blood processing  systems such
as: (1) the CryoSealJ AHF System for  automated  production of  Cyroprecipitated
AHF; (2) the  CryoSealJ  AFG System for the  automated  production of autologous
fibrin glue; (3) a MicroSeal(TM)  AFG system;  (4) a CryoFactor APDGF System for
automated  concentration  of  platelet  derived  growth  factors;  and  (5)  the
BioArchive(R) a system for collecting, processing, controlled-rate freezing, and
inventory management of thermolabile blood products in liquid nitrogen utilizing
disposable  containers.  Although these  products use technology  related to our
core  competence,  they also  represent a  departure  from our former core blood
plasma business. Further, although we have had discussions with experts in areas
of application for these products, these products are still in their development
and/or  initial  market  phase.  No  assurance  can be  given  that all of these
potential  products can be  successfully  developed,  and if  developed,  that a
market will also develop for them.

Continued Nasdaq Listing.  The Nasdaq SmallCap Market on which our common shares
are traded has established certain maintenance listing requirements that must be
satisfied  in order for a company's  shares to continue to be listed.  Primarily
because of historical losses, no assurance can be given that we will continue to
be able to satisfy those continued listing  requirements,  which could result in
the delisting of our common shares from the Nasdaq  SmallCap  Market.  Delisting
may result in the trading of our shares on the  Over-The-Counter  Bulletin Board
which may adversely affect the liquidity of our shares.

<PAGE>6


Government Regulation of Products. Most of our products require FDA clearance to
sell in the U.S. Further,  we will require approval from comparable  agencies to
sell our products in foreign  countries.  These  approvals 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.  Further,  if we
cannot establish that our products are substantially equivalent, or superior, in
safety and efficacy to  previously  approved  products in the U. S.,  delays may
result in final clearance from the FDA for marketing its products.  No assurance
can be given that the FDA  clearance to market our products in the U. S. will be
obtained, or that regulatory approval will be received in all foreign countries.
Although the standards  established by the FDA are generally more  encompassing,
our products may also be required to meet certain additional criteria or receive
certain approvals from other foreign governments for marketing and sales.

Influence of Governments and Insurance  Companies on Sales of Our Products.  Our
business may be materially  affected by continuing  efforts by  government,  and
third party  payors 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 the U.S., we expect that there will continue
to be a number of federal and state  proposals to implement  similar  government
control.  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.

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.

Trade  Secrets.  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.

Competition.  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 four  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 plasma  fractionaters  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.

Limited  Marketing  and Sales  Force for New  Products.  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

<PAGE>7


distribution agreements for the area of the two new platform products, there are
no  assurances  that the  distributors  will  produce  significant  sales of the
systems.

Lack of Production  Experience for New Products.  We currently  manufacture  our
blood plasma  thawers and freezers that are less  technologically  sophisticated
products.  Although we have redesigned our manufacturing facility to accommodate
the  BioArchive  System  and the  CryoSeal  System,  we do not have  significant
experience  in  manufacturing  those  more  complex  medical  devices  or in the
manufacture  of  disposables.  Furthermore,  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 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.

No  Assurance  of New  Product  Acceptance.  The  market  acceptance  of our new
products in development  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 and the BioArchive  System.  Even if our 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  of  either  of these  new  systems  to  achieve
significant  market share could have material  adverse  effects on our long term
business,  financial condition, and results of operation. See our "Annual Report
on Form  10-K --  Description  of  Business"  and  "Risk  Factors  --  Uncertain
Availability of Third-Party Reimbursement."

There is No Assurance  That Our Senior  Management  Team Will Remain With Us. We
are dependent upon the experience and services of Philip H. Coelho, Chairman and
Chief  Executive  Officer,  and James H. Godsey,  President and Chief  Operating
Officer.  The loss of either person would adversely  affect our  operations.  We
have  obtained  key man life  insurance  covering  Mr.  Coelho in the  amount of
$2,000,000 as some protection  against this risk. See our "Annual Report on Form
10-K - Description of the Business -- Employees."

Product  Liability and Uninsured  Risks. 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.

Risk of Software  Defects.  Our CryoSeal  System and  BioArchive  System rely on
computer software  components that direct the harvesting process of the CryoSeal
System, and the controlled-rate freezing,  storage and retrieval robotics of the
BioArchive  System.  The software program for these products,  including updated
versions  in the future,  may contain  undetected  errors or  failures.  Despite
testing by us and our customers,  there can be no assurance that errors will not
be found in the software  during  continuous  use.  Unfound errors may result in
loss or delay in market acceptance,  which could have an adverse material effect
on our business, financial condition, and results of operations.

<PAGE>8

Future  Sales of  Unregistered  Shares  Could Have A Negative  Impact on Trading
Price of the Common Stock. Under an agreement with the selling stockholders,  we
have agreed to register for resale by this prospectus  shares of common stock to
be issued  upon the  conversion  of the  Series B  preferred  stock and upon the
exercise of the warrants.  The Series B preferred stock is currently convertible
into  approximately  8.3% of our  outstanding  common  stock.  If a  substantial
decline in the average market price of our common stock were to occur and all of
the Series B preferred shares are then converted,  up to approximately  19.8% of
our  outstanding  common  stock  could  become  available  for  resale  by  this
prospectus.  Because the trading  price for our common  stock may be affected by
the number of shares available for resale,  the market price of our common stock
could drop as a result of sales of a large  number of shares of our common stock
in the market  after this  offering,  or the  perception  that such sales  could
occur.

We Could Be Required  to Redeem Our Series B  Convertible  Preferred  Stock at a
Premium  Which  Would  Require a Large  Expenditure  of Capital and Could Have a
Material Adverse Affect on Our Financial Condition.  The holders of our Series B
convertible  preferred  stock  have the  right to force us to  repurchase  their
Series B convertible  preferred  stock at a premium if the Company takes certain
action,  deemed  to be solely within the Company's  control - e.g.,  causing the
Company to be delisted from the Nasdaq  Market,  or taking other defined  action
detrimental to the Series B holders.  See "Description of Securities" below. The
repurchase  of our Series B  convertible  preferred  stock would require a large
expenditure  of capital  and we may not have  sufficient  funds to  satisfy  the
redemption.  In  addition,  you could face  further  dilution of your  ownership
percentage  as a result of a decline in the market  price of our common stock or
in the event of certain defaults which would result in an increase in the number
of shares of common stock  issuable upon  conversion of the Series B convertible
preferred  stock.  Any such event could adversely  affect the price of our stock
and our ability to raise  additional  capital.  We have no  intention  of taking
action that would require such an event.

No Cash Dividends.  To date, we have not paid any cash dividends,  and we do not
expect to pay any cash on our common stock in the foreseeable future. The Series
B convertible  preferred stock carries a mandatory 6% dividend,  paid quarterly,
out of funds legally available. At our election, that dividend may be accrued to
the conversion  value of that series of stock in lieu of any cash payment.  With
our current cash needs,  we do not anticipate  that the dividend will be paid in
cash  and,  therefore,  additional  shares of  common  stock may be issued  upon
conversion. See "Description of Securities" below.


<PAGE>9



                          SUMMARY FINANCIAL INFORMATION

The  following  summary  information  is derived from the  financial  statements
included in our Annual Report on Form 10-K for the year ended June 30, 1999, and
Quarterly  Report  on Form  10-Q  for the  quarter  ended  September  30,  1999,
incorporated by reference  herein,  and should be read in conjunction with those
financial statements and the related notes thereto.

<TABLE>
<S>                                       <C>               <C>              <C>               <C>                <C>

                                                                                                  For the Three Months
                                               For the Year Ended June 30,                         Ended September 30,
                                       ------------------------------------------------       -----------------------------

                                          1997                1998              1999               1998             1999
                                      -------------      -------------     -------------       ------------     ------------

Statement of Operations Data:

Revenues                               $ 6,614,044        $ 4,396,891       $ 5,004,890        $ 1,099,000       $   980,000

Operating expenses                     $ 7,207,274        $ 8,493,699       $ 6,859,093        $ 1,643,000       $ 1,512,000

Net loss                               $(4,805,822)       $(9,550,795)      $(6,098,904)       $(1,804,000)      $(1,752,000)

Basic and diluted net loss per
common share                           $     (0.32)       $     (0.54)      $     (0.50)       $     (0.10)      $     (0.08)

Weighted average shares
outstanding                             14,805,000         17,629,876        19,242,310         18,925,669        20,804,942

</TABLE>

<TABLE>
<S>                                                      <C>                <C>               <C>               <C>



                                                                     June 30,                          September 30,
                                                       --------------------------------      ------------------------------

                                                            1998               1999              1998              1999
                                                       --------------      ------------      -------------     ------------
Selected Balance Sheet Data:

Working Capital                                          $3,665,798         $5,054,940        $2,039,959        $3,471,000

Total Assets                                             $7,799,242         $8,133,264        $5,943,760        $6,427,000

Total Liabilities                                        $2,226,350         $1,414,620        $2,164,362        $1,443,000

Stockholders' Equity                                     $5,572,892         $6,718,644        $3,779,398        $6,427,000

</TABLE>

<PAGE>10

                                   THE COMPANY

We  design  and  sell  products  and  devices  which  utilize  our   proprietary
thermodynamic technology for the processing of biological substances,  including
the cryopreservation,  thawing,  harvesting,  and archiving of blood components.
Historically, our primary revenues have been from sales of blood plasma freezers
and thawers to hospitals, blood banks, and blood transfusion centers. Currently,
we are manufacturing  several categories of thermodynamic devices that are being
sold to the blood plasma  industry  under FDA  clearance to market in the United
States. Other potential markets for our proprietary technology include surgical,
pharmaceutical,  and industrial applications. Since fiscal year 1998, we focused
our  efforts  on  research  and  development  and  refinement  of a core line of
products for blood banks.  Since fiscal 1994, we have developed new applications
for  our   products   and   technology,   including  a  system  for   harvesting
cryoprecipitated  AHF from a donor's  blood  plasma for use in the  treatment of
hemophilia,  and by some  physicians as a hemostatic  agent or tissue sealant in
certain surgical and medical procedures.

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 were designed for blood banks and hospitals and received
510(k)  permission  to market,  and we sell those  products  either  directly or
through our  distribution  network in the 32  countries  where our  products are
marketed.  See our "Annual Report on Form 10-K. -- Description of the Business -
Distribution Channels".

From 1988 to 1992,  our products  were designed to transfer heat by causing heat
transfer  liquids to directly  contact  plastic sealed  containers  within which
resided various blood components.  Early product designs used liquids containing
chloro-flouro-carbons  ("CFC")  which  we  phased  out  in  the  fall  of  1992.
Thereafter, we developed an alternative heat transfer method which automatically
interposed  a thin  flexible  membrane  between  the heat  transfer  liquid  and
biological  substances  which  process  allowed  for use of  non-CFC  based heat
transfer liquids.

Principal  products initially  developed by us and marketed to hospitals,  blood
banks, and blood transfusion centers consisted of freezers and thawers for blood
plasma.  We have  continued  to design and develop  various  freezer  models and
thawers for expanded  applications,  and these products remain the core products
of our current  business.  To expand our market and product use, we have changed
the focus of our research  and  development  to the design of new products  that
would be applied to different applications within the blood industry,  including
surgical,  pharmaceutical,  and medical  procedures  that  utilize  freezing and
thawing  technology as part of standard  procedures.  See our "Annual Report on
Form 10-K."

Recent Financing and Other Recent Events

On December 22, 1999,  and January 4, 2000, we completed a private  placement of
4,040 shares of Series B convertible  preferred  stock,  raising an aggregate of
$4,040,000,  before  direct  expenses.  Warrants to purchase  484,562  shares of
common stock at an exercise  price of $2.73 per share were also issued.  The net
proceeds from the private  placement are being used for general working capital.
Under the terms of the private placement, we are required to register the common
shares underlying the Series B preferred stock and warrants.


<PAGE>11



                             SUMMARY OF THE OFFERING

We are  registering  4,720,562  shares of common stock for resale by the selling
stockholders  of which a maximum  of  4,236,000  shares  may be issued  upon the
conversion of Series B preferred stock and 484,562 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  upon the conversion of the Series B preferred  stock.

                              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  option 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.  These activities are limited by the purchase agreements between
us and the Series B  convertible  preferred  stockholders  during  periods of 20
trading days occurring  every six months for the three years when the conversion
price is subject to periodic adjustment.

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.

<PAGE>12


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

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 January 20, 2000,
and indicates  certain  information known to us with respect to (i) any material
relationship  between  the  selling  stockholders  and us during  the past three
years,  (ii)  the  number  of  shares  of  common  stock  held  by  the  selling
stockholders,  (iii) the  amount to be  offered  for the  selling  stockholders'
account,  and (iv) 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  converted  their  Series B  preferred  stock or
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 shareholders
may resell their shares pursuant to Rule 144.

The Series B  convertible  preferred  stock and warrants are not  registered  or
listed for trading on the Nasdaq Stock Market or on any exchange.

The  shares  shown as owned  and  offered  by  Advantage  Fund II Ltd.,  by Koch
Investment  Group Limited,  and by Clarion  Capital under this prospectus may be
issued upon  conversion of Series B convertible  preferred stock and exercise of
warrants acquired by these selling  stockholders from us in a private placement.
Under the terms of the Series B convertible preferred stock and the warrants, no
selling stockholder can convert Series B convertible preferred stock or exercise
warrants  to the extent  such  conversion  or  exercise  would cause the selling
stockholder's  beneficial  ownership  of  our  common  stock  (excluding  shares
underlying  unconverted  Series B convertible  preferred  stock and  unexercised
warrants) to exceed 4.9% of the outstanding shares of common stock.

<PAGE>13

<TABLE>
        <S>                                         <C>                     <C>                 <C>                 <C>

                                                      Shares Owned          Shares to            Shares Owned
                                                   Prior to Offering         be Sold            After Offering (6)
                                                   -------------------   ----------------      ----------------
        Name of Stockholder                              Number              Number                  Number         Percentage
        -------------------------------            -------------------   ----------------      ----------------     -----------

        Advantage Fund II Ltd.                         1,507,549 (1)         2,896,125 (2)(4)             0              0



        Koch Investment Group Limited                    904,529 (1)         1,737,675 (3)(4)             0              0

        Clarion Capital Corporation                      134,121 (1)(2)         46,762 (4)          110,000              *

        Division of Financial West Group                  40,000 (5)            40,000                    0              0
        Reedland Capital Partners, a

</TABLE>

Footnotes to Table
- ------------------

*    Less than one percent.

(1)  Represents the number of shares  issuable upon the conversion of the Series
     B  convertible  preferred  stock at the initial fixed  conversion  price of
     $2.2719,  including  conversion of two years of accrued dividends  thereon,
     plus shares issuable upon exercise of the warrants.

(2)  Genesee  International,  Inc., the investment  manager of Advantage Fund II
     Ltd.,  may be deemed to  beneficially  own the shares  offered by Advantage
     through  its shared  dispositive  and voting  power over such  shares.  Mr.
     Donald R. Morken, the controlling stockholder of Genesee International, may
     be deemed to control the exercise by Genesee  International  of such shared
     dispositive and voting power over such shares.

(3)  Koch Industries, Inc., the indirect parent company of Koch Investment Group
     Limited,  may be deemed to  beneficially  own the  shares  offered  by Koch
     Investment  Group Limited  through its shared  dispositive and voting power
     over such  shares.  Messrs.  Charles  Koch and  David  Koch,  the  majority
     stockholders of Koch  Industries,  may be deemed to control the exercise by
     Koch  Industries  of such  shared  dispositive  and voting  power over such
     shares

(4)  Represents  the  maximum  number  of  shares  that can be  issued  upon the
     conversion of Series B convertible  preferred stock which is  approximately
     19.8% of the then issued and outstanding  shares at the time of the closing
     plus the shares  issuable upon the exercise of the warrants.  However,  the
     subscription agreements limit the number of shares of common stock that can
     be  issued to the  holders  upon  conversion  of the  Series B  convertible
     preferred stock to 4.9% of the then  outstanding  shares of common stock at
     any time.

(5)  Represents  shares underlying  placement agent warrants,  exercisable until
     December 22, 2004, at $2.72628 per share

(6)  Assumes all shares offered are sold.

As of the date of this  prospectus,  the  selling  stockholders  do not hold any
other  of our  securities  other  than  the  shares  being  offered  under  this
prospectus and the Series B convertible  preferred stock and warrants  described
in  this  prospectus,   except  for  110,000  shares  held  by  Clarion  Capital
Corporation.  None of the selling stockholders has had any material relationship
with us within the past three years.

<PAGE>14

                            DESCRIPTION OF SECURITIES

Our authorized capital stock consists of two classes:  50,000,000 shares,  $.001
par value, of common stock and 2,000,000  shares,  $.001 par value, of preferred
stock.  As  of  January  14,  2000,  21,338,262  shares  of  common  stock  were
outstanding,  750,000 shares of Series A preferred stock were  outstanding,  and
4,040 shares of Series B preferred  stock were  outstanding.  There are no other
series of preferred stock outstanding.

Common Stock

Common stock  shareholders have full voting rights, one vote for each share held
of record.  Subject to  preferential  rights of Series A and Series B  preferred
stock shareholders,  common stock shareholders are entitled to receive dividends
as may be declared by the Board out of funds  legally  available  therefor,  and
share pro rata in any  distributions to stockholders  upon  liquidation.  Common
stock shareholders have no conversion, preemptive, or other subscription rights.
All of the outstanding shares of common stock are, and the shares offered hereby
will be, validly issued, fully paid, and nonassessable.

Preferred Stock

As discussed below, we have two series of preferred stock designated.  The Board
is authorized to establish  other series or designations of preferred stock with
rights, preferences, privileges, and restrictions on such stock as the Board may
determine, subject to the rights of the outstanding series of preferred stock.

Series A Convertible Redeemable Preferred Stock

We have designated 1,200,000 shares as Series A convertible redeemable preferred
stock. Each share of Series A preferred stock has the following characteristics:

     Conversion. Each share of Series A preferred stock is convertible into five
shares of common  stock at the option of the  holder or at our  option  provided
that the common  stock is trading at an average  price equal to or greater  than
$5.00  per  share  for 30  consecutive  trading  days.  Each  share of  Series A
preferred stock is subject to customary anti-dilution protection.

     Voting  Rights.  Provided  that  more  than 35% of the  number  of Series A
preferred  stock  shares  remain  outstanding,  the  Series  A  preferred  stock
shareholders  are entitled to vote for one director,  as a separate  class,  and
approval  by  holders of at least a majority  of the Series A  preferred  stock,
voting together as a separate  class,  is required for certain events  including
(i) any  issuance  of a new  series of shares  having  rights,  preferences,  or
privileges with respect to liquidation preference, redemption or dividend rights
senior or  equivalent  to the  Series A  preferred  stock,  (ii) any  payment or
declaration of any dividends  rights or any other  distribution or redemption of
any of our capital stock,  (iii) sale or disposition of substantially all of our
property or business or any  consolidation or merger with any entity in which we
are not the  survivor,  (iv) an amendment to our  articles of  incorporation  or
bylaws,  and (v) any investments of another business exceeding $1 million in the
aggregate.  Unless  required by law, the Series A preferred  stock  shareholders
will  be  entitled  to  vote  on  all  other   matters  with  the  common  stock
shareholders,  together  as a class,  on an as  converted  basis.  The  Series A
preferred  stock  shareholders  have approved by a majority vote the issuance of
the Series B preferred shares on a pari passu basis with the Series A shares.

<PAGE>15


     Dividends.  Each share of Series A  preferred  stock is entitled to receive
non-cumulative  dividends  at the  same  rate  and  same  time as any  dividends
declared on our common stock determined on an as converted basis.

     Liquidation  Rights.  Upon liquidation,  dissolution,  or winding up of our
company,  the holder of Series A preferred stock shall be entitled to received a
liquidation preference equal to $6.25 per share which shall increase at the rate
of 8% per share, per year,  compounded  annually on each anniversary date of the
issuance of the Series A preferred stock before there are any  distributions  to
common  stock   shareholders.   After  payment  to  Series  A  preferred   stock
shareholders of the liquidation  preference as adjusted,  the Series A preferred
stock  shareholders shall not be entitled to any further  distribution.  If upon
any liquidation,  dissolution,  or winding up the assets to be distributed among
the Series A preferred stock shareholders shall be insufficient for full payment
of the  liquidation  preference,  then the  amount  to be  distributed  shall be
distributed  ratably to the Series A preferred stock  shareholders and any other
preferred stock of equal rank.

     Preemptive Rights. Each Series A preferred stock shareholder has preemptive
rights to purchase any new share  issuance by us in order to maintain his or her
percentage share ownership interest in our company.

                      Series B Convertible Preferred Stock

     We have designated  4,040 shares as Series B convertible  preferred  stock.
Each share of Series B preferred stock has the following characteristics:

     Conversion.  The Series B convertible  preferred stock is currently limited
in conversion to a maximum of 4,236,000 shares.  However, the current conversion
price is a fixed conversion price of $2.2719 which represents the average market
price of our common stock for the ten days prior to the issuance of the Series B
convertible  preferred  stock on December 22, 1999, the date we sold the initial
4,000 shares of the Series B convertible preferred stock. Commencing on June 22,
2000,  the  conversion  price will be adjusted on such date and every six months
thereafter to be the lesser of (a) 130% of the fixed  conversion price as stated
above,  or (b) 90% of the  average  market  price for the ten days prior to such
adjustment  date. The conversion  price is subject to further  adjustment  under
certain  other  circumstances,  including  our inability to provide the Series B
convertible  preferred  stockholders with common stock  certificates on a timely
basis  after  receiving  notice  of their  conversion,  our  failure  to pay any
applicable  redemption  price  when  due,  and  the  occurrence  of  any  of the
repurchase  events  described  below for reasons not solely  within our control.
Upon an adjustment of the conversion  price, the number of shares into which the
Series  B  convertible  preferred  stock  may be  converted  is  correspondingly
adjusted.  The conversion  price and number of shares of common stock underlying
the Series B convertible preferred stock is also subject to adjustment for stock
splits,  stock dividends,  combinations,  capital  reorganizations,  and similar
events relating to our common stock.

     Voting  Rights.  The Series B  convertible  preferred  stock has no general
voting rights. However, holders of the Series B convertible preferred stock have
the right to consent to the issuance of any capital  stock that is senior to the
Series B convertible  preferred  stock,  to any amendment of our  certificate of
incorporation  which  materially and adversely  affects the Series B convertible
preferred  stock,  and to any amendment to the terms of the Series B convertible
preferred stock. In addition,  pursuant to the purchase  agreements entered into

<PAGE>16


in  connection  with the issuance of the Series B convertible  preferred  stock,
without the consent of the holders of the Series B convertible  preferred stock,
we may not issue for approximately  twelve months after issuance of the Series B
preferred stock, any common stock (or securities convertible into common stock),
at a price below the market  price of the common  stock on the date of issuance,
except in certain specified  instances.  For  approximately  twelve months after
issuance,  the holders of the Series B convertible  preferred  stock also have a
right of first refusal to acquire any such equity securities except in specified
instances set forth in the purchase agreements.

     Dividends.  Dividends  at the rate of $60 per  annum  per share of Series B
preferred stock (6% annual dividend) are payable in cash or, at our option,  may
be added to the value of the Series B  convertible  preferred  stock  subject to
conversion  and to the $1,000 per share  liquidation  preference of the Series B
convertible preferred stock.

     Redemption.  If we are in  compliance  with  the  terms  of  the  Series  B
convertible preferred stock and our agreements with the selling stockholders, we
have the right at any time to redeem the Series B convertible preferred stock at
a premium  (generally,  120% of the  $1,000  per share  liquidation  value  plus
accrued and unpaid dividends),  and under certain  circumstances,  at the market
value of the common stock into which the Series B  convertible  preferred  stock
would  otherwise be  convertible.  Assuming we are in compliance with such terms
and  agreements,  after the third  anniversary  of  issuance,  we may redeem the
Series B convertible  preferred stock at its liquidation  value plus accrued and
unpaid dividends.

     If certain events occur which are solely within our control, the holders of
the Series B  convertible  preferred  stock  have the right to  request  that we
repurchase  all or some of their  Series B  convertible  preferred  stock at the
greater of the premium or  converted  market  value.  These  events  include our
taking actions or omitting to take actions that result in the following:

o    there is no  closing  bid  price  reported  for our  common  stock for five
     consecutive trading days;

o    our common  stock  ceases to be listed for  trading on the Nasdaq  SmallCap
     Market;

o    the holders of the Series B convertible  preferred stock are unable, for 30
     or more days  (whether  or not  consecutive)  to sell  their  common  stock
     issuable  upon  conversion  of the  Series B  convertible  preferred  stock
     pursuant to an effective registration statement;

o    we default under any of the agreements relating to our sale of the Series B
     convertible  preferred  stock,  including  our  failure  to timely  deliver
     certificates for common stock upon conversion;

o    certain business combination events;

o    the adoption of any amendment to our Articles of  Incorporation  materially
     adverse to the holders of the Series B convertible  preferred stock without
     the  consent  of the  holders of a  majority  of the  Series B  convertible

<PAGE>17


     preferred stock; and

o    the  holders  of the  Series B  convertible  preferred  stock are unable to
     convert all of their shares because of limitations under exchange or market
     rules that require  stockholder  approval of certain stock issuances and we
     fail to obtain such approval.

     Liquidation  Rights.  Upon  liquidation,   the  holders  of  the  Series  B
convertible preferred stock will be entitled to receive, before any distribution
to holders of our common stock or any other class or series of our capital stock
ranking  junior  to  the  Series  B  convertible  preferred  stock,  liquidation
distributions equal to $1,000 per share, plus any accrued and unpaid dividends.

Series B Warrants

We also issued warrants in connection with the private placement of our Series B
convertible  preferred  stock. We issued warrants to purchase  444,562 shares of
common stock to the holders of Series B convertible  preferred stock, and 40,000
warrants to the placement  agent. The exercise price of the warrants is $2.72628
per share, and they expire on December 22, 2004.

The exercise  price and number of shares of common stock  issuable upon exercise
of the warrants  held by the Series B  convertible  preferred  stockholders  are
subject to adjustment in certain events.

Series B Registration Obligation

We have agreed to register for resale the shares of common stock  issuable  upon
the conversion of the Series B convertible  preferred  stock and the exercise of
the warrants.

Stock Options

As of January  17,  2000,  we had  outstanding  options  to  purchase a total of
2,125,500  shares of common stock at exercise prices ranging from $1.13 to $4.50
per share, of which options to purchase 1,887,166 shares were exercisable.  Some
of these  options are subject to vesting,  and in general,  have a three or five
year exercise period.  See our "Annual Report on Form 10-K -- Notes to Financial
Statements."

Other Warrants

As of January 17,  2000,  warrants to  purchase a total of  2,958,763  shares of
common stock were outstanding with exercise prices ranging from $1.20 to $3.0966
per share, all of which were exercisable. Included in the number of warrants are
warrants to purchase  484,562 shares of common stock which are subject to resale
by this  prospectus.  See our "Annual  Report on Form 10-K -- Notes to Financial
Statements" which is incorporated by reference in this prospectus.

<PAGE>18

                     CERTIFICATE OF INCORPORATION AND BYLAWS

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 by
it 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 American Securities Transfer & Trust,
Inc., 938 Quail Street, Suite 101, Lakewood, Colorado 80215-5513.

                                     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, 1999, 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 David C. Adams,  V.P. and
General Counsel.  Mr. Adams beneficially owned options to acquire 180,000 shares
of common stock and owned  outright  24,474 shares of common stock as of January
18, 2000.


<PAGE>19

                       GLOSSARY OF CERTAIN TECHNICAL TERMS


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

AUTOLOGOUS:  autogenous; related to self; originating within an organism itself,
as an autograft or autotransfusion.

CLASS II MEDICAL  SYSTEM:  those  devices for which general  controls  alone are
insufficient  to  assure  safety  and  effectiveness  and  for  which  mandatory
performance standards must be developed by the FDA.

COAGULATION:  (1) the process of clot formation;  (2) in surgery, the disruption
of  tissue  by   physical   means  to  form  an   amorphous   residuum,   as  in
electrocoagulation and photocoagulation.

CORE LINE PRODUCTS:  (1) device for the  ultra-rapid  cryopreservation  of human
blood plasma; (2) portable device for the ultra-rapid  cryopreservation of human
blood  plasma;  (3) device for the rapid  thawing of frozen  plasma for hospital
patient care;  (4) device for the hermetic  sealing of blood tissue  containers;
(5) "smart"  blood  collection  monitor;  (6) Vial  BioArchiveTM  System for the
Japanese Red Cross.

CRYOPRECIPITATE:  any precipitate that results from cooling,  as cryoglobulin or
antihemophilic factor.

CRYOPRECIPITATED AHF: A preparation of antihemophilic  factor, which is obtained
from a single unit of plasma collected and processed in a closed system.

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

CRYOSEALTM: 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.

DEWAR:  container  that keeps its  contents  at a  constant  and  generally  low
temperature by means of two external walls between which a vacuum is maintained.

FACTOR VIII:  antihemophilic  factor (AHF): a relatively  storage-labile  factor
participating only in the intrinsic pathway of blood coagulation.  Deficiency of
this factor, when transmitted as a sex-linked  recessive trait, causes classical
hemophilia  (hemophilia A). More than one molecular form of this factor has been
discovered.  Called also antihemophilic globulin (AHG) and antihemophilic factor
A.

FACTOR XIII: fibrin  stabilizing  factor (FSF): a factor that polymerizes fibrin
monomers so that they become stable and insoluble in urea,  thus enabling fibrin
to form a firm  blood  clot.  Deficiency  of this  factor  produces  a  clinical
hemorrhagic  diathesis.  Called also fibrinase and Laki-Lorand factor (LLF). The
inactive  form is also  known  as  protransglutaminase  and the  active  form as
transglutaminase.

<PAGE>20


FIBRONECTIN: an adhesive glycoprotein:  one form circulates in plasma, acting as
an opsonin;  another is a cell-surface  protein which mediates cellular adhesive
interactions.  Fibronectins  are  important  in  connective  tissue,  where they
cross-link to collagen, and they are also involved in aggregation of platelets.

HEMATOLOGY:  that branch of medical  science,  which treats of the morphology of
the blood and blood forming tissues.

HEMOSTATIC:  (1) checking the flow of blood;  (2) an agent that arrests the flow
of blood.

MACULAR:  pertaining to or characterized by the presence of macules;  pertaining
to the macula retinae.

N2 BIOARCHIVE:  system for controlled  rate freezing,  storage and retrieval and
inventory   management   of   biological   samples  which  require  LN2  storage
temperatures, such as placental, stem and progenitor cells.

PIPELINE  PRODUCTS:  (1) CryoSealTM  System,  thermodynamic  processor;  (2) LN2
BioArchiveTM  System,  computerized LN2 dewar with robotic arm; (3) CryoFactorTM
System,   thermodynamic   processor;   (4)  MicroSealantTM   System,  bench  top
thermodynamic processor; (5) CryoPlateletTM System, thermodynamic processor.

PLATELET  DERIVED  GROWTH  FACTOR  (PDGF):  a substance  contained  in the alpha
granules  of  platelets  and  capable  of  inducing  proliferation  of  vascular
endothelial cells, vascular smooth muscle cells, fibroblasts and glia cells; its
action contributes to the repair of damaged vascular walls.

PROGENITOR: a parent or ancestor.

THERMOLABILE:  easily altered or decomposed by heat.

VON WILLEBRAND'S FACTOR: the attribute of Factor VIII necessary for the adhesion
of  platelets to vascular  elements.  Deficiency  of this factor  results in the
prolonged bleeding time seen in von Willebrand's disease.

<PAGE>21

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.  Other Expenses of Issuance and Distribution.

The following table sets forth the costs and expenses  payable by our company in
connection with the issuance and distribution of the securities being registered
hereunder.  No expenses shall be borne by the selling  stockholders.  All of the
amounts shown are estimates, except for the SEC registration fee.



SEC registration fee                               $ 3,661
Printing and engraving expenses                    $   -0-
Accounting fees and expenses                     * $
Legal fees and expenses                          * $
Transfer agent and registrar fees                * $   -0-
Fees and expenses for qualification under
state securities laws                              $   -0-
Miscellaneous                                    * $   -0-
                                                   ---------

                                        TOTAL      $
                                                   =========

*    estimated

<PAGE>II-1


Item 15. Indemnification of Directors and Officers

Section 145 of the Delaware General  Corporation Law permits  indemnification of
directors,  officers, and employees of corporations under certain conditions and
subject to certain  limitations.  Article  Eighth of our  Amended  and  Restated
Certificate of Incorporation  contain provisions for the  indemnification of its
directors and officers to the fullest extent permitted by law.

Under such law, we are  empowered to indemnify  any person who was or is a party
or is threatened to be made a party to any  proceeding  (other than an action by
or in the right of our  company to procure a judgment in its favor) by reason of
the fact that such  person is or was an  officer,  director,  employee  or other
agent of our company or our subsidiaries,  against expenses,  judgments,  fines,
settlements,  and other amounts  actually and reasonably  incurred in connection
with such  proceeding,  if such person  acted in good faith and in a manner such
person  reasonably  believed to be in our best  interests  and, in the case of a
criminal  proceeding,  has no  reasonable  cause to believe  the conduct of such
person  was  unlawful.  In  addition,  we  may  indemnify,  subject  to  certain
exceptions, any person who was or is a party or is threatened to be made a party
to any  threatened,  pending,  or  completed  action  by or in the  right of our
company  to  procure  a  judgment  in our  favor by reason of the fact that such
person is or was an officer, director, employee or other agent of our company or
our  subsidiaries,  against  expenses  actually and reasonably  incurred by such
person in  connection  with the  defense or  settlement  of such  action if such
person  acted in good faith and in a manner  such  person  believed to be in the
best interest of our company and shareholders.  We may advance expenses incurred
in  defending  any  proceeding  prior to final  disposition  upon  receipt of an
undertaking  by the agent to repay that amount it shall be  determined  that the
agent is not entitled to indemnification as authorized.

In addition,  we have director's and officer's  liability  insurance,  which our
bylaws provide authority to maintain to insure directors or officers against any
liability incurred capacity as such, or arising out of their status as such.

Item 16.   Exhibits and Financial Statement Schedules

<TABLE>
<S>     <C>     <C>                                                                    <C>

Exhibit  Description

3.1      (a)      Amended and Restated Certificate of Incorporation                      (4)
         (b)      Revised Bylaws                                                         (4)
4.1               Certificate of Designation Series A Convertible Redeemable
                  Preferred Stock                                                       (12)
4.2               Certificate of Designation of Series B Convertible
                  Preferred Stock                                                       (16)
4.3               Warrant [form]                                                        (16)
4.4               Registration Rights Agreement Dated Dec. 22, 1999 [form]              (16)
5.1               Opinion of David C. Adams, General Counsel to the registrant
10.1     (a)      Letter of Agreement with Liquid Carbonic, Inc.                         (1)
         (b)      Letter of Agreement with Fujitetsumo USA                               (1)
         (c)      Letter of Agreement with Fujitetsumo Japan                             (1)
         (d)      License Agreement between Stryker Corp. and
                  THERMOGENESIS CORP., Corp.                                             (5)
         (e)      Lease of Office and Mfg. Space                                         (4)
         (f)      Executive Development and Distribution Agreement
                  between THERMOGENESIS CORP. and Daido Hoxan Inc.                       (3)

<PAGE>II-2


         (g)      Administrative Office Lease                                            (6)
         (h)      Employment Agreement for Philip H. Coelho                              (8)
         (i)      Employment Agreement for Charles de B. Griffiths                       (8)
         (j)      Employment Agreement for Walter J. Ludt                                (8)
         (k)      Employment Agreement for David C. Adams                               (11)
         (l)      Employment Agreement for James H. Godsey                              (11)
         (m)      Employment Agreement for Sam Acosta                                   (11)
         (n)      Licensing/Manufacturing Agreement with On-Time Mfg.                    (8)
         (o)      License Agreement and distribution with Asahi Medical                  (9)
         (p)      License Agreement with Pall/Medsep Corporation                        (10)
         (q)      Distribution Agreement with Dideco S.P.A.                             (13)
         (r)      Employment Agreement for Philip H. Coelho                             (15)
         (s)      Employment Agreement for Renee Ruecker                                (15)
         (t)      Amendment to License Agreement with Asahi Medical                     (15)
         (u)      Subscription Agreement dated Dec. 22, 1999 [form]                     (16)

23.1              Consent of General Counsel is contained in exhibit 5.1.

23.2              Consent of Ernst & Young LLP, independent auditors

27.1              Financial Data Schedule (Not Applicable)

</TABLE>

<PAGE>II-3

Footnotes to Index

(1)  Incorporated  by  reference  to  Registration  Statement  No.  33-37242  of
     THERMOGENESIS CORP., Corp. filed on February 7, 1991.

(2)  Incorporated by reference to Form 8-K for July 19, 1993.

(3)  Incorporated by reference to Form 8-K for June 9, 1995.

(4)  Incorporated by reference to Form 10-KSB for the year ended June 30, 1994.

(5)  Incorporated by reference to Form 8-K for September 27, 1995.

(6)  Incorporated by reference to Form 10-QSB for the quarter ended December 31,
     1995.

(7)  Incorporated by reference to Form 8-K for November 27, 1996.

(8)  Incorporated by reference to Form 10-KSB for the year ended June 30, 1996.

(9) Incorporated by reference to Form 8-K for May 29, 1996.

(10) Incorporated by reference to Form 8-K for March 27, 1997.

(11) Incorporated by reference to Form 10-K for the year ended June 30, 1997.

(12) Incorporated by reference to Form 8-K for January 14, 1998.

(13) Incorporated by reference to Form 8-K for February 16, 1998.

(14) Incorporated by reference to Form 10-K for the year ended June 30, 1998.

(15) Incorporated by reference to Form 10-K for the year ended June 30, 1999.

(16) Incorporated by reference to Form 8-K for December 23, 1999.

Item 17.  Undertakings

(a)    The undersigned Company hereby undertakes:

       (1) To file, during any period in which offers or sales are being made, a
       post-effective amendment to this registration statement:

          (i)  To include any prospectus  required by Section  (10)(a)(3) of the
               Securities Act;

          (ii) To reflect in the  prospectus  any facts or events  arising after
               the effective  date of this  Registration  Statement (or the most
               recent post-effective  amendment thereof) which,  individually or
               in  the  aggregate,   represent  a  fundamental   change  in  the
               information set forth in this Registration Statement;

         (iii) To include any material  information  with respect to the plan of
               distribution  not  previously   disclosed  in  this  Registration
               Statement  or any  material  change to such  information  in this
               Registration Statement.


<PAGE>II-4

               Provided,  however,  that  paragraphs  (a)(1)(i) and  (a)(1)(ii),
               above, do not apply if the information required to be included in
               a  post-effective  amendment by these  paragraphs is contained in
               periodic  reports  filed  with  or  furnished  by the  Registrant
               pursuant  to  Section  13 or 15(d) of the  Exchange  Act that are
               incorporated by reference in this Registration Statement.

               (2)   That, for the purpose of determining any liability under
               the Securities Act, each such  post-effective  amendment shall be
               deemed  to  be a  new  registration  statement  relating  to  the
               securities  offered therein,  and the offering of such securities
               at that time shall be deemed to be the initial bona fide offering
               thereof.

               (3) To remove from  registration by means of a  post-effective
               amendment  any of the  securities  being  registered  that remain
               unsold at the termination of the offering.

(b)  The  undersigned   Registrant  hereby  undertakes  that,  for  purposes  of
     determining  liability  under  the  Securities  Act,  each  filing  of  the
     Registrant's  annual  report  pursuant to Section 13(a) or Section 15(d) of
     the Exchange  Act that is  incorporated  by reference in this  Registration
     Statement shall be deemed to be a new  registration  statement  relating to
     the securities  offered herein, and the offering of such securities at that
     time shall be deemed to be the initial bona fide offering thereof.

(c)  Insofar as indemnification for liabilities arising under the Securities Act
     of 1933 may be permitted to directors,  officers and controlling persons of
     THERMOGENESIS  CORP.  pursuant to the foregoing  provisions,  or otherwise,
     THERMOGENESIS  CORP. has been advised that in the opinion of the Commission
     such  indemnification  is against public policy as expressed in the Act and
     is, therefore, unenforceable. In the event that a claim for indemnification
     against such liabilities (other than the payment by the Company 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, the Company will, unless in the opinion of
     its counsel the matter has been settled by controlling precedent, submit to
     a  court  of   appropriate   jurisdiction   the   question   whether   such
     indemnification  by it  is  against  public  policy  as  expressed  in  the
     Securities  Act and will be  governed  by the  final  adjudication  of such
     issue.


<PAGE>II-5

                                   SIGNATURES

Pursuant  to  the  requirements  of the  Securities  Act of  1933,  the  Company
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized,  in Rancho Cordova,  County of Sacramento,  State of California,  on
January 18, 2000.

                               THERMOGENESIS CORP.

                                      /s/    PHILIP H. COELHO
                                             ----------------------------------
                                             Philip H. Coelho, Chairman & C.E.O.

KNOW ALL PERSONS BY THESE  PRESENTS,  that each person whose  signature  appears
below constitutes and appoints James H. Godsey or David C. Adams as his true and
lawful   attorney-in-fact  and  agent,  with  full  power  of  substitution  and
re-substitution,  for him and in his  name,  place,  and  stead,  in any and all
capacities, to sign any and all amendments (including post-effective amendments)
to this registration statement, and to file the same, with all exhibits thereto,
and other  documents in connection  therewith,  with the Securities and Exchange
Commission,  granting  unto said  attorneys-in-fact  and  agent,  full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in connection  therewith,  as fully to all intents and purposes as he
might or could do in  person,  hereby  ratifying  and  confirming  all that said
attorney-in-fact  and agent or any of them, or of his substitute or substitutes,
may lawfully do or cause to be done by virtue hereof.

Pursuant to the  requirements of the Securities Act of 1933,  this  registration
statement has been signed below by the following  persons in the  capacities and
on the dates indicated:


/s/ PHILIP H. COELHO
    ----------------
    Philip H. Coelho                                    Dated: January 18, 2000
    Philip H. Coelho, C.E.O.
    and Chairman of the Board
   (Principal Executive Officer)

 /s/ RENEE M. RUECKER
     -----------------                                  Dated: January 18, 2000
     Renee M. Ruecker,
     Vice President Finance
     (Principal Accounting Officer and
     Principal Financial Officer)

 /s/ JAMES H. GODSEY
     -------------------                               Dated: January 18, 2000
     James H. Godsey,
     President, C.O.O.
     Director

 /s/ HUBERT E. HUCKEL                                  Dated: January 18, 2000
     ----------------------
     Hubert E. Huckel,
     Director

/s/ Patrick McEnancy
    ----------------------
    PATRICK MCENANCY                                   Dated: January 18, 2000

 /s/ DAVID S. HOWELL                                   Dated: January 18, 2000
     ----------------------
     David S. Howell,
     Director



January 19, 2000

Board of Directors
THERMOGENESIS CORP.
3146 Gold Camp Drive
Rancho Cordova, California 95670

RE:    Common Stock of THERMOGENESIS CORP.

Dear Gentlemen:

I have acted as general counsel to THERMOGENESIS  CORP., a Delaware  corporation
(the "Company"),  in connection with the registration of 4,720,562 shares of the
Company's  common stock (the  "Shares")  under the  Securities  Act of 1933,  as
amended (the  "Securities  Act"), of which 444,562 of the Shares will be offered
to holders of the Company's  warrants,  and all of which will be sold by selling
stockholders of the Company as further  described in the Company's  registration
statement  on Form  S-3  filed  under  the  Securities  Act  (the  "Registration
Statement").

For the purpose of rendering  this  opinion,  I examined  originals or copies of
such  documents  as deemed to be  relevant.  In  conducting  my  examination,  I
assumed,  without  investigation,   the  genuineness  of  all  signatures,   the
correctness of all certificates,  the authenticity of all documents submitted to
me as originals, the conformity to original documents of all documents submitted
as certified or photostatic  copies,  and the  authenticity  of the originals of
such copies,  and the accuracy and completeness of all records made available to
me by the Company.  In addition,  in rendering this opinion,  I assumed that the
Shares will be offered in the manner and on the terms  identified or referred to
in the Registration Statement, including all amendments thereto.

My opinion is limited  solely to matters  set forth  herein.  I am  admitted  to
practice  in the State of  California  and I express no opinion as to the law of
any other jurisdiction other than the laws of the State of Delaware and the laws
of the United States.

Based upon and subject to the foregoing,  after giving due regard to such issues
of law as I deemed relevant,  and assuming that (i) the  Registration  Statement
becomes  and  remains  effective,  and  the  prospectus  which  is a part of the
Registration   Statement  (the   "Prospectus"),   and  the  Prospectus  delivery
requirements  with  respect  thereto,  fulfill  all of the  requirements  of the
Securities Act, throughout all periods relevant to the opinion,  (ii) all offers
and sales of the Shares will be made in compliance  with the securities  laws of
the states having jurisdiction  thereof, and (iii) the Company receives,  to the
extent  applicable,  the consideration set forth in the Prospectus,  I am of the
opinion that the Shares issued are, and the Shares to be issued will be, legally
issued, fully paid and nonassessable.

<PAGE>2


I hereby  consent  in  writing  to the use of my  opinion  as an  exhibit to the
Registration  Statement and any amendment thereto.  By giving such consent, I do
not thereby  admit that I come within the category of persons  where  consent is
required under Section 7 of the  Securities Act or the rules and  regulations of
the Securities and Exchange Commission.

Sincerely,

/s/ DAVID C. ADAMS
    -----------------
    David C. Adams
    General Counsel



               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS


We  consent to the  reference  to our firm under the  caption  "Experts"  in the
Registration  Statement (Form S-3) and related Prospectus of THERMOGENESIS CORP.
for  the  registration  of  4,720,562  shares  of its  common  stock  and to the
incorporation  by reference  therein of our report  dated August 13, 1999,  with
respect to the financial statements and schedule of THERMOGENESIS CORP. included
in its Annual  Report (Form 10-K) for the year ended June 30,  1999,  filed with
the Securities and Exchange Commission.


                                                    /s/  ERNST & YOUNG LLP


                                                         Sacramento, California
                                                         January 17, 2000


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