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Details for Patent: 4,528,287

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Summary for Patent: 4,528,287

Title: 6-Fluoro-1, 4-dihydro-4-oxo-7-substituted piperazinylquinoline-3-carboxylic acids and the method for preparing the same
Abstract:The invention is concerned with the novel piperazinylquinoline-3-carboxylic acids represented by formula (I) ##STR1## or a pharmacologically-acceptable salt thereof, a process for the preparation of them, and a pharmaceutical composition which contains these new compounds as active ingredient and can be used as the therapeutic agent against bacteria.
Inventor(s): Itoh; Yasuo (Katsuyamashi, JP), Kato; Hideo (Fukuishi, JP), Ogawa; Nobuo (Katsuyamashi, JP), Koshinaka; Eiichi (Katsuyamashi, JP), Suzuki; Tomio (Kamishiimura, JP), Yagi; Noriyuki (Katsuyamashi, JP)
Assignee: Hokuriku Pharmaceutical Co., Ltd. (Katsuyamashi, JP)
Application Number:06/651,423
Patent Claim Types:
see list of patent claims
Compound; Composition;

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Foreign Priority and PCT Information for Patent: 4,528,287

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan58-171271Sep 19, 1983
Japan59-45664Mar 12, 1984
Japan59-123780Jun 18, 1984

International Patent Family for Patent: 4,528,287

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria34573► subscribe
Australia3298484► subscribe
Australia553415► subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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