-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 VbGVK7oBLvCWWEpdNqF4tCzhlN0A6Zau/ywnqVB4PkqdzDN0cTsRAOlFfj4aCAF/
 SktT2lKlugnm75clhSY1fg==

<SEC-DOCUMENT>0001001277-04-000402.txt : 20040916
<SEC-HEADER>0001001277-04-000402.hdr.sgml : 20040916
<ACCEPTANCE-DATETIME>20040916185524
ACCESSION NUMBER:		0001001277-04-000402
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040825
FILED AS OF DATE:		20040916
DATE AS OF CHANGE:		20040916

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Marr Dennis F PhD
		CENTRAL INDEX KEY:			0001303368

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	333-82900
		FILM NUMBER:		041034697

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		(916) 858-5100

	MAIL ADDRESS:	
		STREET 1:		THERMOGENESIS CORP
		STREET 2:		2711 CITRUS ROAD
		CITY:			RANCHO CORDOVA
		STATE:			CA
		ZIP:			95742

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			THERMOGENESIS CORP
		CENTRAL INDEX KEY:			0000811212
		STANDARD INDUSTRIAL CLASSIFICATION:	LABORATORY APPARATUS & FURNITURE [3821]
		IRS NUMBER:				943018487
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		2711 CITRUS ROAD
		CITY:			RANCHO CORDOVA
		STATE:			CA
		ZIP:			95742
		BUSINESS PHONE:		9168585100

	MAIL ADDRESS:	
		STREET 1:		2711 CITRUS ROAD
		CITY:			RANCHO CORDOVA
		STATE:			CA
		ZIP:			95742

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INSTA COOL INC OF NORTH AMERICA
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>for082504_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2004-08-25</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000811212</issuerCik>
        <issuerName>THERMOGENESIS CORP</issuerName>
        <issuerTradingSymbol>KOOL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001303368</rptOwnerCik>
            <rptOwnerName>Marr Dennis F PhD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>THERMOGENESIS CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>2711 CITRUS ROAD</rptOwnerStreet2>
            <rptOwnerCity>RANCHO CORDOVA</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95742</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>V.P. of Res. &amp; Dev.</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Options</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>3.98</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2011-08-25</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>60000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">12,000 vests on 8/25/05; 12,000 vests on 8/25/06; 12,000 vests on 8/25/07; 12,000 vests on 8/25/08; and 12,000 vests on
8/25/09.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Dennis Marr</signatureName>
        <signatureDate>2004-09-14</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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