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Details for Patent: 5,252,334

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Summary for Patent: 5,252,334

Title: Solid matrix system for transdermal drug delivery
Abstract:A matrix for containing drugs for transdermal delivery systems is disclosed. The matrix, formed of a skin-adhesive acrylate copolymer, attains high rates of drug delivery without the addition of drug delivery rate enhancers. In preferred embodiments the matrix is used to administer steroids, in particular estradiol. Water-soluble polymers may be added as well.
Inventor(s): Chiang; Chia-Ming (Foster City, CA), Tenzel; Renee A. (Mountain View, CA)
Assignee: Cygnus Therapeutic Systems (Redwood City, CA)
Application Number:07/857,094
Patent Claim Types:
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Delivery; Device;

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International Patent Family for Patent: 5,252,334

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria131074► subscribe
Australia6441590► subscribe
Australia644815► 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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