Last Updated: September 24, 2026

Details for Patent: 3,903,283

Name: Drug Patent Intelligence for US Patent 3903283
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Summary for Patent: 3,903,283

Title:	2-Aminoalkyl tetrahydroquinolines as anti-schistosomal agents
Abstract:	Novel 2-aminoalkyl-7-substituted-1,2,3,4,-tetrahydroquinoline compounds, useful as effective anti-schistosomal agents, are disclosed and suitable modes of preparation are described. These compounds all possess either nitro, cyano or halogen substituted at the 7-position of the molecule, in addition to having a methyl, hydroxymethyl, alkoxymethyl or formyl group located at the adjacent 6-position.
Inventor(s):	Hugh Colin Richards
Assignee:	Pfizer Ltd Great Britain , Pfizer Inc
Application Number:	US462211A
Patent Claim Types: see list of patent claims

Drugs Protected by US Patent 3,903,283

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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

Foreign Priority and PCT Information for Patent: 3,903,283

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
United Kingdom	26893/67	Jun 10, 1967

International Family Members for US Patent 3,903,283

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Belgium	762071	⤷ Start Trial
Switzerland	498116	⤷ Start Trial
Germany	1770595	⤷ Start Trial
Spain	354673	⤷ Start Trial
France	7680	⤷ Start Trial
United Kingdom	1166538	⤷ Start Trial
Israel	30088	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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