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Serving leading biopharmaceutical companies globally:

Daiichi Sankyo
Express Scripts

Generated: November 22, 2017

DrugPatentWatch Database Preview

Details for Patent: 5,447,926

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Summary for Patent: 5,447,926

Title: Quinolone carboxylic acid derivatives
Abstract:A quinolone carboxylic acid derivative having the following formula (1), ##STR1## wherein R.sup.1 is a hydrogen atom, an alkyl group, an aralkyl group, an ester residual group which can be hydrolyzed in living bodies, R.sup.2 is a hydrogen atom or an amino group which may be substituted by one or two lower alkyl groups, X is a hydrogen atom or a halogen atom, Y is CH.sub.2, O, S, SO, SO.sub.2, or N--R.sup.3, wherein R.sup.3 is a hydrogen atom or a lower alkyl group, and Z is an oxygen atom or two hydrogen atoms; or a salt thereof; and an antimicrobial agent comprising the same. The compound exhibits a superior antimicrobial activity, especially against gram positive microorganisms, and is thus useful for the treatments and prevention of various infectious diseases in clinics.
Inventor(s): Konno; Fujiko (Tomisato, JP), Shibata; Akihiro (Yachiyo, JP), Matsuda; Hideaki (Abiko, JP), Asaoka; Takemitsu (Narita, JP), Kawahara; Ryuichi (Ichikawa, JP), Taido; Naokata (Funabashi, JP), Kuraishi; Tasdayuki (Chiba, JP), Takeda; Sunao (Ichihara, JP)
Assignee: SS Pharmaceutical Co., Ltd. (Tokyo, JP)
Application Number:08/305,977
Patent Claim Types:
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Compound; Composition; Use;

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Foreign Priority and PCT Information for Patent: 5,447,926

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan2-191339Jul 19, 1990
Japan3-079774Apr 12, 1991

International Patent Family for Patent: 5,447,926

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office0493608► Subscribe
Canada2065846► Subscribe
Germany69113604► Subscribe
Denmark0493608► Subscribe
Spain2080327► Subscribe
Austria128707► Subscribe
Greece3017651► Subscribe
Hong Kong125296► Subscribe
JapanH054968► Subscribe
Japan2613139► 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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Serving leading biopharmaceutical companies globally:

Cantor Fitzgerald
Express Scripts
Argus Health

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