Last Updated: August 25, 2026

Details for Patent: 3,415,821

Name: Drug Patent Intelligence for US Patent 3415821
Creator: DrugPatentWatch
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Summary for Patent: 3,415,821

Title:	1-(5-substituted)furfurylideneamino hydantoins and imidazolidinones
Abstract:
Inventor(s):	Davis Charles Stewert, Jr Harry Raymond Snyder
Assignee:	Eaton Laboratories Inc , Warner Chilcott Pharmaceuticals Inc
Application Number:	US485566A
Patent Claim Types: see list of patent claims

Drugs Protected by US Patent 3,415,821

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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 3,415,821

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Belgium	686434	⤷ Start Trial
Switzerland	483446	⤷ Start Trial
France	1550961	⤷ Start Trial
Israel	26182	⤷ Start Trial
Sweden	303758	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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