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Serving leading biopharmaceutical companies globally:

Boehringer Ingelheim
Fish and Richardson
Farmers Insurance

Generated: December 15, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,728,721

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Summary for Patent: 4,728,721

Title: Polymer, production and use thereof
Abstract:The present invention provides a biodegradable high molecular polymer characterized in that the content of water-soluble low molecular compounds, as calculated on the assumption that said compounds each is a monobasic acid, is less than 0.01 mole per 100 grams of said high molecular polymer. The thus-obtained molecular polymer has good aging stability and can be used advantageously as an excipient for pharmaceutical preparations.
Inventor(s): Yamamoto; Masaki (Osaka, JP), Okada; Hiroaki (Osaka, JP), Ogawa; Yasuaki (Osaka, JP), Miyagawa; Tsutomu (Saitama, JP)
Assignee: Takeda Chemical Industries, Ltd. (Osaka, JP) Wako Pure Chemical Industries, Ltd. (Osaka, JP)
Application Number:06/858,040
Patent Claim Types:
see list of patent claims
Composition; Compound; Formulation; Use;

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Foreign Priority and PCT Information for Patent: 4,728,721

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan60-97617May 07, 1985

International Patent Family for Patent: 4,728,721

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria87946► Subscribe
Canada1262005► Subscribe
Germany3688213► Subscribe
European Patent Office0202065► Subscribe
Hong Kong5796► Subscribe
Hungary196703► Subscribe
HungaryT43488► Subscribe
Japan2551756► Subscribe
Japan2660401► Subscribe
JapanH08169818► 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:

US Army
Express Scripts
Federal Trade Commission
Harvard Business School
Daiichi Sankyo
Farmers Insurance
Argus Health

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