Last Updated: July 21, 2026

Details for Patent: 3,663,706

Name: Drug Patent Intelligence for US Patent 3663706
Creator: DrugPatentWatch
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Summary for Patent: 3,663,706

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Title:	Use of 2,4-diaminoquinazolines as hypotensive agents
Abstract:	NOVEL 2,4-DIAMINOQUINAZOLINES WHEREIN AT LEAST ONE OF THE 6-OR 7-POSITIONS IS SUBSTITUTED WITH ALKOXY HAVING FROM 1 TO 3 CARBON ATOMS AND ACID ADDITION SALTS THEREOF, THE PREPARATION THEREOF AND THE UTILITY THEREOF AS HYPOTENSIVE AGENTS.
Inventor(s):	Hans-Jurgen E Hess
Assignee:	Pfizer Pharmaceuticals LLC
Application Number:	US871171A
Patent Claim Types: see list of patent claims

Drugs Protected by US Patent 3,663,706

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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

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