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Details for Patent: 5,194,247

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Summary for Patent: 5,194,247

Title: Synergistic skin depigmentation composition
Abstract:There is disclosed a synergistic composition for skin depigmentation with reduced irritation which does not contain a corticosteroid comprising 4-hydroxyanisole and a retinoid, such as all-trans retinoic acid, 11-cis,13-cis-12-hydroxymethyl retinoic acid .delta.-lactone or (N-acetyl-4-aminophenyl) retinoate, in a pharmaceutically acceptable topical vehicle.
Inventor(s): Nair; Xina (E. Amherst, NY), Tramposch; Kenneth M. (Williamsville, NY)
Assignee:
Application Number:07/554,904
Patent Claim Types:
see list of patent claims
Composition; Compound;

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International Patent Family for Patent: 5,194,247

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria104544► subscribe
Brazil1100177► subscribe
Canada2022917► 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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