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Serving leading biopharmaceutical companies globally:

US Department of Justice
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Generated: December 17, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,430,343

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Summary for Patent: 4,430,343

Title: Benzimidazole derivatives, process for the preparation thereof and pharmaceutical composition containing the same
Abstract:Novel benzimidazole derivatives of the formula: ##STR1## wherein R.sup.1 is an alkyl group having 1 to 3 carbon atoms, allyl group, propargyl group, or phenyl group; R.sup.2 is hydrogen atom or an alkyl group having 1 to 3 carbon atoms; and n is 2 or 3, or pharmaceutically acceptable acid addition salts thereof, which have excellent antihistaminic activities and are useful as antiallergics for various allergic diseases, and a process for the preparation thereof, and an antihistaminic composition containing the compound as an active ingredient.
Inventor(s): Iemura; Ryuichi (Kawanisi, JP), Kawashima; Tsuneo (Kobe, JP), Fukuda; Toshikazu (Osaka, JP), Ito; Keizo (Osaka, JP), Nose; Takashi (Nara, JP), Tsukamoto; Goro (Toyonaka, JP)
Assignee: Kanebo, Ltd. (Tokyo, JP)
Application Number:06/436,032
Patent Claim Types:
see list of patent claims
Compound; Composition;

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Foreign Priority and PCT Information for Patent: 4,430,343

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan56-178804Nov 06, 1981

International Patent Family for Patent: 4,430,343

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria19878► Subscribe
Germany3271269► Subscribe
European Patent Office0079545► Subscribe
JapanH0224821► Subscribe
JapanS5879983► 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:

Chinese Patent Office
Cantor Fitzgerald
Farmers Insurance
Express Scripts

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