Last Updated: September 24, 2026

Details for Patent: 3,461,461

Name: Drug Patent Intelligence for US Patent 3461461
Creator: DrugPatentWatch
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Summary for Patent: 3,461,461

Title:	6-amino-4-(substituted amino)-1,2-dihydro-1-hydroxy-2-iminopyrimidines
Abstract:
Inventor(s):	William C Anthony, Joseph J Ursprung
Assignee:	Pharmacia and Upjohn Co
Application Number:	US505993A
Patent Claim Types: see list of patent claims

Drugs Protected by US Patent 3,461,461

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Patented / Exclusive Use	Submissiondate
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Patented / Exclusive Use	>Submissiondate

International Family Members for US Patent 3,461,461

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Switzerland	495361	⤷ Start Trial
Germany	1620649	⤷ Start Trial
Germany	1695939	⤷ Start Trial
Germany	1695940	⤷ Start Trial
Germany	1695958	⤷ Start Trial
Germany	1695959	⤷ Start Trial
Germany	1795837	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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