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Serving leading biopharmaceutical companies globally:

Chinese Patent Office
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Generated: October 24, 2017

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Details for Patent: 4,189,469

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Summary for Patent: 4,189,469

Title: Pharmaceutical compositions
Abstract:A pharmaceutical composition for oral administration in dosage unit form which comprises at least one xanthine derivative selected from the group consisting of (a) (.omega.-1(-hydroxyalkyl-dialkylxanthines wherein the (.omega.-1)-hydroxyalkyl group contains 5 or 6 carbon atoms and is in the 1- or 7-position, the alkyl group in the other of the 1- and 7-position contains from 1 to 12 carbon atoms and the alkyl group in the 3-position contains from 1 to 4 carbon atoms, (b) (.omega.-1)-oxoalkyl-dimethylxanthines wherein the (.omega.-1)-oxoalkyl group contains 5 or 6 carbon atoms and is in the 1- or 7-position, (c) dimethylxanthine derivatives having an additional alkyl group containing from 4 to 12 carbon atoms in the 1- or 7-position, and (d) dimethylxanthine derivatives having an additional benzyl group in the 1- or 7-position and a saliva forming agent, each dosage unit containing at least 300 mg of xanthine derivative, and the weight ratio of xanthine derivative to saliva forming agent being in the range from 1:2 to 10:1 and a method for the preparation of said composition.
Inventor(s): Gleixner; Klaus (Taunusstein-Wehen, DE), Muller; Roland (Wiesbaden, DE), Lehrach; Franz (Wiesbaden, DE)
Assignee: Hoechst Aktiengesellschaft (Frankfurt, DE)
Application Number:05/683,795
Patent Claim Types:
see list of patent claims
Composition; Dosage form; Process;

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Foreign Priority and PCT Information for Patent: 4,189,469

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Germany2520978May 10, 1975

International Patent Family for Patent: 4,189,469

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia502644► Subscribe
Australia1376576► Subscribe
Belgium841617► Subscribe
Cyprus1153► Subscribe
Germany2520978► Subscribe
Denmark205376► Subscribe
Denmark153918► Subscribe
France2310764► Subscribe
United Kingdom1547232► Subscribe
Hong Kong42382► 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:

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