THERMOGENESIS CORP. ANNOUNCES FOURTH QUARTER
                              AND YEAR END RESULTS

               Company Achieves Record Quarter and Annual Revenues
                           Led By BioArchive(R) Sales


Rancho Cordova,  California  (September 10, 2004) - THERMOGENESIS CORP. (Nasdaq:
KOOL) today  announced  results for it's fourth  quarter and year ended June 30,
2004.  Net  revenues  for the  quarter  ended June 30,  2004,  increased  25% to
$3,636,000,  compared to $2,898,000  for the fourth  quarter of fiscal 2003. For
the year ended June 30,  2004,  the  Company's  net  revenues  increased  14% to
$11,646,000 compared to $10,187,000 for the prior year. The gross profit for the
fourth quarter was  $1,244,000 or 34% of net revenues  compared to $1,008,000 or
35% for the  fourth  quarter  ended June 30,  2003.  For the year ended June 30,
2004, the gross profit  increased to $3,802,000 or 33% compared to $2,287,000 or
22% for the prior year.

Our net loss for the quarter  ended June 30, 2004,  was  $1,097,000 or $0.02 per
basic and diluted  share  compared to a $991,000 net loss of $0.03 per basic and
diluted share for the quarter  ended June 30, 2003.  For the year ended June 30,
2004,  the net loss was  $4,777,000  or $0.11  per basic and  diluted  share,  a
decrease from $5,603,000 or $0.15 per basic and diluted share for the year ended
June 30, 2003.

The Company  posted  it's  highest  revenues  since it's  inception,  led by the
BioArchive  product  line which  generated  $7,745,000  in revenues for the year
ended June 30, 2004, an increase of  $2,297,000 or 42% over the prior year.  The
Company sold 26 devices in the year ended June 30,  2004,  versus 20 in the year
ended June 30,  2003.  The Company  attributes  the  increase to the infusion of
government  funding in Japan and  Moscow  and the  growth of private  cord blood
banking in Asia.

"The increase in the annual gross profit margin  demonstrates the success of the
restructuring plan implemented in the last quarter of fiscal 2003", stated Kevin
Simpson,  President  and  Chief  Operating  Officer.  "This  restructuring  plan



included  an increase in volume and  selling  prices of the  BioArchive  product
line,  reduction of our in-house  costs of  manufacturing,  and an array of cost
reduction activities to improve our operating margin."

The Company  reported a cash  balance of $16.6  million  and working  capital of
$19.8  million  at June 30,  2004  compared  to $6.8  million  of cash and $10.4
million of working capital at June 30, 2003.

"I am  very  pleased  with  our  results  for  fiscal  2004,  specifically,  our
achievement  of  record   revenues  and  gross  profit,   and  a   significantly
strengthened   balance  sheet",   said  Philip  Coelho,   Chairman  and  CEO  of
ThermoGenesis.  "It appears that our  BioArchive  product  platform is achieving
international  market  acceptance  and we hope the same  trend  will  follow the
completion  of the  CryoSeal  US  clinical  trial and  market  launch of product
platform extensions."

Company Conference Call
Management will host a conference call today, September 10, 2004 at 11:00 AM PDT
to review the financial  results and other corporate  events,  followed by a Q&A
session. The call can be accessed by dialing:  (800) 860-2442 within the U.S. or
(412) 858-4600  outside the U.S and giving the conference name  "THERMOGENESIS".
Participants  are  asked to call the  assigned  number  approximately  5 minutes
before the  conference  call  begins.  A replay of the  conference  call will be
available  two hours  after the call for the  following  five  business  days by
dialing:  (877) 344-7529 within the U.S. or (412) 317-0088  outside the U.S. and
entering the following account number: 323 and the following  conference number:
353367.

About ThermoGenesis Corp.
After extensive  research,  THERMOGENESIS  CORP.'s newly  introduced  technology
platforms  lead the world in their ability to produce  biological  products from
single units of blood.  Umbilical  cord blood banks are  utilizing the Company's
BioArchive  System as an enabling  technology  for the  cryogenic  archiving  of
hematopoietic  stem cell  units.  The  CryoSeal  FS  System  is used to  prepare
autologous  hemostatic and adhesive  surgical  sealants from patient blood.  The
CryoSeal  FS  System  is  currently  undergoing  a Phase  III  trial  and is not



currently sold in the U.S.  THERMOGENESIS  CORP. has been a leading  supplier of
state-of-the-art  Ultra-Rapid Blood Plasma Freezers and Thawers to hospitals and
blood banks since 1992.

The statements contained in this release which are not historical facts are
forward-looking statements that are subject to risks and uncertainties that
could cause actual results to differ materially from those expressed in the
forward-looking statements, including, but not limited to, certain delays beyond
the Company's control with respect to market acceptance of new technologies and
products, delays in testing and evaluation of products and other risks detailed
from time to time in the Company's filings with the Securities and Exchange
Commission.

                         For More Information, Contact:
                               THERMOGENESIS CORP.
                        Renee M. Ruecker: (916) 858-5100
                 or visit the web site at www.thermogenesis.com


                               THERMOGENESIS CORP.
                            Condensed Balance Sheets
                                    Unaudited


                                                                                                   

                                                                               June 30,                  June 30,
                                                                                 2004                      2003
                                                                           ---------------           -----------------
ASSETS
Current assets:
  Cash and cash equivalents                                                  $16,612,000                $6,815,000
  Accounts receivable, net                                                     3,107,000                 2,014,000
  Inventory                                                                    2,470,000                 2,650,000
  Other current assets                                                           582,000                   820,000
                                                                           ---------------           -----------------

      Total current assets                                                    22,771,000                12,299,000

Equipment, net                                                                 1,146,000                   442,000

Other assets                                                                     197,000                    50,000

                                                                             $24,114,000               $12,791,000
                                                                           ===============           ================

LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable                                                            $1,709,000                $1,165,000
  Other current liabilities                                                    1,264,000                   769,000
                                                                           ---------------           -----------------

      Total current liabilities                                                2,973,000                 1,934,000

Long-term liabilities                                                            173,000                   283,000

Stockholders' equity                                                          20,968,000                10,574,000
                                                                           ---------------           -----------------

                                                                             $24,114,000               $12,791,000
                                                                           ===============           ================