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Details for Patent: 4,983,395

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Summary for Patent: 4,983,395

Title: Device for administering an active agent to the skin or mucosa
Abstract:A transdermal drug delivery device comprising a drug formulation-containing reservoir defined by a backing layer and a drug-permeable membrane layer, a peelable inner liner that underlies the reservoir and a portion of the backing/membrane outwardly of the reservoir periphery, an adhesive layer that underlies the inner liner and outwardly extending portions of the membrane/backing layers, and a peelable release liner layer that underlies the adhesive layer with a first permanent heat seal between the backing and the membrane about the perimeter of the reservoir and another concentric peelable (impermanent) heat seal between the membrane and the inner liner positioned underlying and at a radius not less than the first permanent heat seal, the heat seals and peelable barrier layer providing barriers that isolate the drug formulation from the adhesive.
Inventor(s): Chang; Yunik (Toms River, NJ), Patel; Dinesh C. (Murray, UT), Ebert; Charles D. (Salt Lake City, UT)
Assignee: TheraTech Inc. (Salt Lake City, UT)
Application Number:07/326,536
Patent Claim Types:
see list of patent claims
Device; Formulation;

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International Patent Family for Patent: 4,983,395

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia631417<disabled in preview>
Canada1302824<disabled in preview>
European Patent Office0316168<disabled in preview>
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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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