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Colorcon
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Generated: October 20, 2017

DrugPatentWatch Database Preview

Details for Patent: 5,591,452

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Summary for Patent: 5,591,452

Title: Controlled release formulation
Abstract:A controlled release preparation for oral administration contains tramadol, or a pharmaceutically acceptable salt thereof, as active ingredient.
Inventor(s): Miller; Ronald B. (Basel, CH), Leslie; Stewart T. (Cambridge, GB2), Malkowska; Sandra T. A. (Cambridgeshire, GB2), Smith; Kevin J. (Cambridge, GB2), Wimmer; Walter (Limburg, DE), Winkler; Horst (Linter, DE), Hahn; Udo (Nentershausen, DE), Prater; Derek A. (Cambridge, GB2)
Assignee: Euro-Celtique, S.A. (Luxembourg, LU)
Application Number:08/241,129
Patent Claim Types:
see list of patent claims
Composition; Formulation; Compound; Dosage form;

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Foreign Priority and PCT Information for Patent: 5,591,452

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Germany43 15 525.1May 10, 1993
United Kingdom9324045Nov 23, 1993
United Kingdom9404544Mar 09, 1994
United Kingdom9404928Mar 14, 1994

International Patent Family for Patent: 5,591,452

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office1527775► Subscribe
European Patent Office1504758► Subscribe
European Patent Office1504757► Subscribe
European Patent Office1502591► Subscribe
Finland121620► Subscribe
Finland943022► Subscribe
Finland121565► Subscribe
HungaryT75703► Subscribe
Hungary228177► Subscribe
Hungary9401478► 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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