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Serving leading biopharmaceutical companies globally:

Boehringer Ingelheim
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Generated: November 23, 2017

DrugPatentWatch Database Preview

Details for Patent: 5,690,923

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Summary for Patent: 5,690,923

Title: Stable topical retinoid compositions
Abstract:Compositions for topical application to the skin are provided, which compositions comprise a retinoid in an aqueous vehicle, and further contain at least one non-ionic surfactant, wherein the non-ionic surfactant is the crystallization-preventing and stabilizing agent for said retinoid and is selected from the group consisting of polyoxyethylene mono fatty alcohol ethers, polyoxyethylene glyceryl fatty acid triesters and ethyleneoxide/propyleneoxide block copolymers.
Inventor(s): DeVringer; Tom (Zoetermeer, NL), Van Harrewijn; Antoon (Delft, NL), Muehlenbruch; Aart (Haarlem, NL)
Assignee: Yamanouchi Europe B.V. (Leiderdorp, NL)
Application Number:08/571,898
Patent Claim Types:
see list of patent claims
Use; Composition;

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Foreign Priority and PCT Information for Patent: 5,690,923

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
93201931Jan 07, 1993
PCT Information
PCT FiledJuly 01, 1994PCT Application Number:PCT/NL94/00151
PCT Publication Date:January 12, 1995PCT Publication Number: WO95/01160

International Patent Family for Patent: 5,690,923

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Finland115607► Subscribe
Czech Republic9503483► Subscribe
Czech Republic285679► Subscribe
Germany69427639► Subscribe
Denmark0706370► Subscribe
European Patent Office0706370► Subscribe
Spain2160631► Subscribe
Finland956204► Subscribe
Canada2166062► Subscribe
Bulgaria61713► 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
Fish and Richardson

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