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Generated: December 10, 2017

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Details for Patent: 5,035,899

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Summary for Patent: 5,035,899

Title: Peroral preparation of acid-unstable compound
Abstract:A peroral preparation of an acid-unstable compound comprises (1) a core containing the acid-unstable compound, (2) a first layer, coated on the core, comprising a hardly water-soluble, film-forming material and fine particles of a hardly water-soluble substance, suspended in the material, and (3) a second layer, coated on the first layer, of enteric film. The acid-unstable compound is a benzimidazole compound.
Inventor(s): Saeki; Yasuharu (Tsukuba, JP), Koyama; Noritoshi (Ibaraki, JP), Watanabe; Sumio (Aichi, JP), Aoki; Shigeru (Gifu, JP)
Assignee: Eisai Co., Ltd. (Tokyo, JP)
Application Number:07/332,731
Patent Claim Types:
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Compound; Dosage form;

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Foreign Priority and PCT Information for Patent: 5,035,899

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan63-121233May 18, 1988

International Patent Family for Patent: 5,035,899

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Spain2051919► Subscribe
Germany68900566► Subscribe
Denmark239189► Subscribe
Denmark174664► Subscribe
European Patent Office0342522► Subscribe
Finland93422► Subscribe
Finland891650► Subscribe
German Democratic Republic283771► Subscribe
Austria70442► Subscribe
Canada1336958► 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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