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Details for Patent: 5,591,452

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Patent 5,591,452 protects RYZOLT and is included in one NDA. There has been one Paragraph IV challenge on Ryzolt.

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;
Patent PDF download available with subscription

Glossary
Applicant Tradename Generic Name Dosage NDA Approval Date Type RLD Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use
Purdue Pharma
RYZOLT
tramadol hydrochloride
TABLET, EXTENDED RELEASE;ORAL021745Dec 30, 2008DISCNNo5,591,452<disabled>Y
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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 Publication Date
South Africa9201366Dec 30, 1992
South Africa9205687Mar 02, 1993
South Africa9402959Jan 05, 1995
South Africa9404599Feb 14, 1995
South Africa9404773Feb 22, 1995
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