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Serving leading biopharmaceutical companies globally:

Johnson and Johnson
UBS
Federal Trade Commission
Novartis
Chubb
Deloitte
Teva
Cantor Fitzgerald
Covington
US Army

Generated: January 17, 2018

DrugPatentWatch Database Preview

Details for Patent: 4,442,101

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Summary for Patent: 4,442,101
Title: Sesquihydrate of naphthyridine derivative, and process for the preparation thereof
Abstract:Novel 1-ethyl-6-fluoro-1,4-dihyono-4-oxo -7-(1-piperazinyl)-1,8-naphthyridine-3-carboxylic acid.sesquihydrate (ATT-2266.sesquihydrate). The aforesaid compound can be prepared by heating 1-ethyl-6-fluoro-1,4-dihydro-4-oxo -7-(1-piperazinyl)-1,8-naphthyridine-3-carboxylic acid at a temperature above about 60.degree. C. in the presence of water in an amount sufficient to form the sesquihydrate. This sesquihydrate is much more stable than the anhydrate and the trihydrate and is superior to the anhydrate in the rate of dissolution and transference into the body through the intestines. Thus, it is especially useful as a pharmaceutical compound.
Inventor(s): Ichihashi; Hitoshi (Kyoto, JP), Tanaka; Terukazu (Osaka, JP), Imasato; Yu (Toyonaka, JP)
Assignee: Dainippon Pharmaceutical Co., Ltd. (Osaka, JP) Laboratoire Roger Bellon (Neuilly sur Seine, FR)
Application Number:06/345,916
Patent Claim Types:
see list of patent claims
Compound; Use; Process; Composition;

Drugs Protected by US Patent 4,442,101

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted
Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted

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Foreign Priority and PCT Information for Patent: 4,442,101

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan56-20749Feb 13, 1981

International Patents Family Members for US Patent 4,442,101

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 8017382 ➤ Subscribe
Australia 547082 ➤ Subscribe
Canada 1216292 ➤ Subscribe
Czechoslovakia 8200998 ➤ Subscribe
Czechoslovakia 254958 ➤ Subscribe
German Democratic Republic 202573 ➤ Subscribe
Germany 3266261 ➤ Subscribe
Denmark 63482 ➤ Subscribe
Denmark 160046 ➤ Subscribe
European Patent Office 0058614 ➤ Subscribe
Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration

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Serving leading biopharmaceutical companies globally:

Medtronic
Federal Trade Commission
McKesson
Cipla
Moodys
Baxter
Cantor Fitzgerald
Accenture
Fish and Richardson

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