-----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,
 Lk0++LHffKqmw1f08TsGGE++ewMGkzlO8dDtkaxUZgln5JANgXnN8mZxkhPxOXd0
 erAkz0Y82e0CWAdJ6XFY7Q==

<SEC-DOCUMENT>0001226537-05-000005.txt : 20051228
<SEC-HEADER>0001226537-05-000005.hdr.sgml : 20051228
<ACCEPTANCE-DATETIME>20051228112947
ACCESSION NUMBER:		0001226537-05-000005
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20051224
FILED AS OF DATE:		20051228
DATE AS OF CHANGE:		20051228

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BENNETT GRANT C
		CENTRAL INDEX KEY:			0001226537

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-16088
		FILM NUMBER:		051288178

	BUSINESS ADDRESS:	
		STREET 1:		P O BOX 338
		CITY:			CHARTLEY
		STATE:			MA
		ZIP:			02712
		BUSINESS PHONE:		5082220614

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CERAMICS PROCESS SYSTEMS CORP/DE/
		CENTRAL INDEX KEY:			0000814676
		STANDARD INDUSTRIAL CLASSIFICATION:	POTTERY & RELATED PRODUCTS [3260]
		IRS NUMBER:				042832509
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1229

	BUSINESS ADDRESS:	
		STREET 1:		111 SOUTH WORCESTER STREET
		STREET 2:		PO BOX 338
		CITY:			CHARTLEY
		STATE:			MA
		ZIP:			02712
		BUSINESS PHONE:		508-222-0614

	MAIL ADDRESS:	
		STREET 1:		111 SOUTH WORCESTER STREET
		STREET 2:		PO BOX 338
		CITY:			CHARTLEY
		STATE:			MA
		ZIP:			02712
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-12-24</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000814676</issuerCik>
        <issuerName>CERAMICS PROCESS SYSTEMS CORP/DE/</issuerName>
        <issuerTradingSymbol>cpsx</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001226537</rptOwnerCik>
            <rptOwnerName>BENNETT GRANT C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>111 SOUTH WORCESTER STREET</rptOwnerStreet1>
            <rptOwnerStreet2>PO BOX 338</rptOwnerStreet2>
            <rptOwnerCity>CHARTLEY</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02712</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President &amp; CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-12-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>G</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10777</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.05</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1601554</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Grant Bennett</signatureName>
        <signatureDate>2005-12-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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