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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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MIC-Info: RSA-MD5,RSA,
 NVrCIliZGHPgA6IEwTAdozpBxs8t8C0JcGVvJXWH850I/lG1znW/hQJ7s2SkJHns
 CFMFL3INM0dXD6QzVdyYwQ==

<SEC-DOCUMENT>0001136782-06-000004.txt : 20060512
<SEC-HEADER>0001136782-06-000004.hdr.sgml : 20060512
<ACCEPTANCE-DATETIME>20060512104003
ACCESSION NUMBER:		0001136782-06-000004
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060430
FILED AS OF DATE:		20060512
DATE AS OF CHANGE:		20060512

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NOCOPI TECHNOLOGIES INC/MD/
		CENTRAL INDEX KEY:			0000888981
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-SERVICES, NEC [8900]
		IRS NUMBER:				870406496
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		537 APPLE ST
		STREET 2:		STE 100
		CITY:			WEST CONSHOHOCKEN
		STATE:			PA
		ZIP:			19428-2903
		BUSINESS PHONE:		6108349600

	MAIL ADDRESS:	
		STREET 1:		537 APPLE ST
		STREET 2:		230 SUGARTOWN RD STE 100
		CITY:			WEST CONSHOHOCKEN
		STATE:			PA
		ZIP:			19428-2903

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HART STANLEY G
		CENTRAL INDEX KEY:			0001136782

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20333
		FILM NUMBER:		06832621

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		610-834-9600

	MAIL ADDRESS:	
		STREET 1:		C/O NOCOPI TECHNOLOGIES INC
		STREET 2:		9C PORTLAND ROAD
		CITY:			WEST CONSHOHOCKEN
		STATE:			PA
		ZIP:			19428
</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>2006-04-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000888981</issuerCik>
        <issuerName>NOCOPI TECHNOLOGIES INC/MD/</issuerName>
        <issuerTradingSymbol>NNUP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001136782</rptOwnerCik>
            <rptOwnerName>HART STANLEY G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O NOCOPI TECHNOLOGIES INC</rptOwnerStreet1>
            <rptOwnerStreet2>9C PORTLAND ROAD</rptOwnerStreet2>
            <rptOwnerCity>WEST CONSHOHOCKEN</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19428</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.215</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-04-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>100000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2007-01-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-04-30</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>100000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>350000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Stock Option granted without payment of consideration</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Stanley Gene Hart</signatureName>
        <signatureDate>2006-05-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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