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Serving leading biopharmaceutical companies globally:

Daiichi Sankyo
Harvard Business School
Boehringer Ingelheim
Queensland Health

Generated: November 20, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,904,769

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Summary for Patent: 4,904,769

Title: Highly pure acarbose
Abstract:A purified acarbose which contains less than 10% by weight of sugar-like secondary components is obtained by column chromatograph of a solution of prepurified acarbose with a pH 4 to 7. The column contains as a packing material a weakly acid cation exchanger which has carboxyl groups and is based on dextran, agarose and cellulose or exchangers which are derived from the latter with the addition of polyamide.
Inventor(s): Rauenbusch; Erich (Wuppertal, DE)
Assignee: Bayer Aktiengesellschaft (Leverkusen, DE)
Application Number:06/940,713
Patent Claim Types:
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Composition; Process;

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Foreign Priority and PCT Information for Patent: 4,904,769

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Germany3543999Dec 13, 1985

International Patent Family for Patent: 4,904,769

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria71951► Subscribe
Bulgaria49497► Subscribe
Canada1288768► Subscribe
China1013866► Subscribe
China86108259► Subscribe
Germany3543999► Subscribe
Germany3683611► Subscribe
Denmark164870► Subscribe
Denmark598686► Subscribe
European Patent Office0226121► 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:

Farmers Insurance
Express Scripts
US Department of Justice
Argus Health
Fish and Richardson

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