Last Updated: May 10, 2026

Details for Patent: 3,591,564

Name: Drug Patent Intelligence for US Patent 3591564
Creator: DrugPatentWatch
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Summary for Patent: 3,591,564

Title:	Transparent polyamides from tetrahydrotricyclopentadienylene diamines
Abstract:	PRODUCTION OF TRANSPARENT POLYAMIDES OF TETRAHYDROTRICYCLOPENTADIENYLENE DIAMINES HAVING THE FORMULA: DI(H2N-)PERHYDRO-4,9:5,8-DIMETHANOCYCLOPENTA(B)NAPHTHALENE WHEREIN SAID DIAMINES ARE POLYCONDENSED WITH DICARBOXYLIC ACIDS, DICARBOXYLIC ESTERS OR DICARBOXYLIC CHLORIDES AT ELEVATED TEMPERATURE, AND NEW POLYAMIDES CONTAINING SAID DIAMINES.
Inventor(s):	Paul Raff, Ludwig Schuster, Guenter Becht, Helmut Doerfel
Assignee:	BASF SE
Application Number:	US738739*A
Patent Claim Types: see list of patent claims

Drugs Protected by US Patent 3,591,564

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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 3,591,564

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	258268	⤷ Start Trial
Belgium	671585	⤷ Start Trial
Belgium	678466	⤷ Start Trial
Switzerland	464896	⤷ Start Trial
Germany	1239302	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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