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Serving leading biopharmaceutical companies globally:

Express Scripts
Farmers Insurance
Daiichi Sankyo
Queensland Health
Fish and Richardson

Generated: December 15, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,725,439

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Summary for Patent: 4,725,439

Title: Transdermal drug delivery device
Abstract:A medical device for the transdermal delivery of an active agent through sensitive intact skin is provided. The device comprises a matrix containing the drug having reinforcing means, preferably in the form of a fabric, embedded in the upper surface of the matrix. The matrix is formed of an agent permeable material which is tacky but does not adhesively bond to the skin. The device is sufficiently flexible and deformable that the combination of tackiness, flexibility, and deformation permits the device to be maintained in agent transmitting relationship upon skin at such sensitive areas as the scrotum, labia, breast, or penis, for example. In certain embodiments, the skin distal surface is provided with a layer of an agent impermeable material to reduce transfer of the agent from the patient to others.
Inventor(s): Campbell; Patricia S. (Palo Alto, CA), Eckenhoff; James B. (Los Altos, CA), Place; Virgil A. (Kawaihae, HI)
Assignee: ALZA Corporation (Palo Alto, CA)
Application Number:06/818,561
Patent Claim Types:
see list of patent claims
Device; Composition; Use;

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International Patent Family for Patent: 4,725,439

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada1257819► Subscribe
Germany3523065► Subscribe
Germany3687067► Subscribe
European Patent Office0232580► Subscribe
Spain296615► Subscribe
Spain556380► Subscribe
Spain8706455► Subscribe
France2571623► Subscribe
United Kingdom2161073► Subscribe
United Kingdom2185187► 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:

Johnson and Johnson
Daiichi Sankyo
Chinese Patent Office
US Department of Justice
US Army
Express Scripts

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