Last Updated: August 31, 2026

Details for Patent: 4,352,803

Name: Drug Patent Intelligence for US Patent 4352803
Creator: DrugPatentWatch
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Summary for Patent: 4,352,803

Title:	Novel naphthyridine derivatives, intermediates thereof, processes for preparation thereof, and use thereof
Abstract:	This invention relates to 1,8-naphthyridine compounds of the formula wherein X is a halogen atom especially fluorine atom, R1 is an ethyl group or a vinyl group, and R2 is a hydrogen atom or a lower alkyl group, their salts and processes for the preparation of them. The 1,8-naphthyridine compounds and their salts are useful as antibacterial agents and intermediates thereof.
Inventor(s):	Jun-ichi Matsumoto, Yoshiyuki Takase, Yoshiro Nishimura
Assignee:	Laboratoire Roger Bellon SA , Sumitomo Pharma Co Ltd
Application Number:	US06/264,824
Patent Claim Types: see list of patent claims	Use; Composition; Dosage form;

Drugs Protected by US Patent 4,352,803

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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: 4,352,803

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Japan	53/104235	Aug 25, 1978
Japan	53/157939	Dec 20, 1978
Japan	53/162095	Dec 29, 1978

International Family Members for US Patent 4,352,803

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Argentina	223983	⤷ Start Trial
Argentina	225195	⤷ Start Trial
Argentina	227529	⤷ Start Trial
Australia	5004979	⤷ Start Trial
Australia	530052	⤷ Start Trial
Canada	1168241	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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