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Serving leading biopharmaceutical companies globally:

Farmers Insurance
Chinese Patent Office
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Daiichi Sankyo

Generated: October 23, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,968,507

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Summary for Patent: 4,968,507

Title: Controlled porosity osmotic pump
Abstract:The instant invention is directed to an osmotic pump comprising: (A) at least one active agent surrounded by (B) a rate controlling water insoluble wall, having a fluid permeability of 6.96.times.10.sup.-18 to 6.96.times.10.sup.-14 cm.sup.3 sec/g and a reflection coefficient of less than 1, prepared from: (i) a polymer permeable to water but impermeable to solute and (ii) 0.1 to 60% by weight, based on the total weight of (i) and (ii), of at least one pH insensitive pore forming additive dispersed throughout said wall.
Inventor(s): Zentner; Gaylen M. (Lawrence, KS), Rork; Gerald S. (Lawrence, KS), Himmelstein; Kenneth J. (Irvine, CA)
Assignee: Merck & Co., Inc. (Rahway, NJ)
Application Number:07/073,781
Patent Claim Types:
see list of patent claims
Delivery; Device;

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International Patent Family for Patent: 4,968,507

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office0169105► Subscribe
Germany3583712► Subscribe
Denmark276585► Subscribe
Denmark175370► Subscribe
Spain8704741► Subscribe
Spain544350► Subscribe
Cyprus1652► Subscribe
Canada1266827► Subscribe
Austria65910► Subscribe
Hong Kong57292► 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:

Boehringer Ingelheim
Farmers Insurance
Federal Trade Commission
US Army
US Department of Justice
Daiichi Sankyo

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