<SEC-DOCUMENT>0001209191-19-045498.txt : 20190812
<SEC-HEADER>0001209191-19-045498.hdr.sgml : 20190812
<ACCEPTANCE-DATETIME>20190812161721
ACCESSION NUMBER:		0001209191-19-045498
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190809
FILED AS OF DATE:		20190812
DATE AS OF CHANGE:		20190812

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CASAMENTO CHARLES J
		CENTRAL INDEX KEY:			0001117167

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38738
		FILM NUMBER:		191016716

	MAIL ADDRESS:	
		STREET 1:		99 BELBROOK WAY
		CITY:			ATHERTON
		STATE:			CA
		ZIP:			94027

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Eton Pharmaceuticals, Inc.
		CENTRAL INDEX KEY:			0001710340
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				371858472
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		21925 W. FIELD PARKWAY
		STREET 2:		SUITE 235
		CITY:			DEER PARK
		STATE:			IL
		ZIP:			60010-7208
		BUSINESS PHONE:		(847) 787-7361

	MAIL ADDRESS:	
		STREET 1:		21925 W. FIELD PARKWAY
		STREET 2:		SUITE 235
		CITY:			DEER PARK
		STATE:			IL
		ZIP:			60010-7208
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-08-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001710340</issuerCik>
        <issuerName>Eton Pharmaceuticals, Inc.</issuerName>
        <issuerTradingSymbol>ETON</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001117167</rptOwnerCik>
            <rptOwnerName>CASAMENTO CHARLES J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>21925 W FIELD PKWY #235</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DEER PARK</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60010</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-08-09</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.1057</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>71920</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The range of purchase prices paid is $6.10 to $6.11. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information will be provided regarding the number of shares purchased or sold at each separate price.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ W. Wilson Troutman, Attorney-in-fact</signatureName>
        <signatureDate>2019-08-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
