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Serving leading biopharmaceutical companies globally:

US Army
Cantor Fitzgerald
Fish and Richardson
Daiichi Sankyo

Generated: December 17, 2017

DrugPatentWatch Database Preview

Details for Patent: 5,186,938

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Summary for Patent: 5,186,938

Title: Adhesive transdermal dosage layer
Abstract:An adhesive bilayer transdermal dosage system capable of sustained release of a pharmaceutically active drug to the skin of a human patient having a first component layer which is a pharmaceutically active drug-containing essentially planar sheet of an at least partially cross-linked acrylic adhesive. The planar sheet is formed of a flexible self-supporting cross-linked acrylate of sufficient adhesivity, durability and strength whereby intimate diffusional contact with the skin of the patient is maintained for a period of at least about 24 hours without destruction of the physical integrity of the sheet. The sheet is capable of retaining, dispersed therein, sufficient pharmaceutically active drug to deliver to the skin a pharmaceutically effective amount of the drug over a 24-hour period without dissolution of the at least partially crosss-linked acrylic adhesive. The system also contains a second component layer intimately adhered to one side of the first component layer. The second component layer is resistant to the passage of the pharmaceutically active drug from the first component layer. Methods for making the first component layer and dosage system are also disclosed.
Inventor(s): Sablotsky; Steven (Miami, FL), Questel; John M. (Cuyahoga Falls, OH), Thompson; James A. (Akron, OH)
Assignee: Key Pharmaceuticals, Inc. (Kenilworth, NJ)
Application Number:07/744,632
Patent Claim Types:
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International Patent Family for Patent: 5,186,938

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria59302► Subscribe
Australia4676185► Subscribe
Australia576889► Subscribe
Germany3581188► Subscribe
Denmark128486► Subscribe
Denmark169202► Subscribe
European Patent Office0190262► Subscribe
Spain546457► Subscribe
Spain8800058► Subscribe
Finland85106► 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:

Farmers Insurance
US Department of Justice
Argus Health
Federal Trade Commission

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