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Serving leading biopharmaceutical companies globally:

Queensland Health
Johnson and Johnson

Generated: November 25, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,892,739

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Summary for Patent: 4,892,739

Title: Osmotic continuous dispensing oral delivery system containing a pharmaceutically acceptable active agent having a improved core membrane adhesion properties
Abstract:An osmotic dispensing delivery system suitable for oral administration, containing a pharmaceutically acceptable active agent for the controlled continuous release of about 50 to about 90 percent by weight of said active agent into the gastrointestinal tract at a rate of about 5 to about 12 percent by weight of said agent per hour consisting essentially of: (a) a shaped solid core containing an osmotically active composition comprising an effective amount of a pharmaceutically acceptable active agent, alone or in combination with a pharmaceutically acceptable binder, an osmotically active driving agent, or tabletting lubricant, or mixtures thereof; (b) said core being substantially evenly coated with a discrete layer of a water-soluble, or water-dispersible, and water permeable substantially non-osmotically active solid polymeric binder, said binder layer being present in an amount between about 0.3 percent and about 10 percent of the weight of the core; (c) a semi-permeable shaped wall member impermeable to said active composition and permeable to gastrointestinal fluid, surrounding and adhesively bonded to the binding layer; and (d) at least one passageway in the wall, for dispensing the active agent, in communication with said core and the external environment.
Inventor(s): Shah; Shailesh B. (Union, NJ), Koparkar; Arun D. (Westfield, NJ)
Assignee: Ciba-Geigy Corporation (Ardsley, NY)
Application Number:07/185,564
Patent Claim Types:
see list of patent claims
Delivery; Composition; Dosage form;

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International Patent Family for Patent: 4,892,739

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Germany58901373► Subscribe
Denmark196189► Subscribe
Denmark175232► Subscribe
European Patent Office0339506► Subscribe
Spain2031302► Subscribe
Finland891921► Subscribe
Finland90203► Subscribe
Greece3005399► Subscribe
HungaryT50625► Subscribe
Hungary201469► 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:

Express Scripts
Harvard Business School
Farmers Insurance
Argus Health

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