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Serving leading biopharmaceutical companies globally:

US Department of Justice
Johnson and Johnson
Argus Health

Generated: December 18, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,968,509

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Summary for Patent: 4,968,509

Title: Oral sustained release acetaminophen formulation and process
Abstract:An acetaminophen-sustained release tablet or tablet layer is formed by making a wet granulation, using Povidone (PVP) in water or alcohol-water as the granulating fluid which is mixed with acetaminophen, hydroxyethyl cellulose, a wicking agent e.g. microcrystalline cellulose, then drying and milling the granulation and blending with dry powdered erosion promoter, e.g. pregelatinized starch, wicking agent, lubricant e.g. magnesium stearate and glidant e.g. silicon dioxide, and compressing the resultant granulation, which upon administration results in a slow release of the acetaminophen.
Inventor(s): Radebaugh; Galen W. (Maple Glen, PA), Murtha; John L. (Holland, PA), Glinecke; Robert (Glenside, PA)
Assignee: McNeilab, Inc. (Spring House, PA)
Application Number:07/299,117
Patent Claim Types:
see list of patent claims
Compound; Dosage form; Process; Composition; Formulation;

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International Patent Family for Patent: 4,968,509

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office0305051► Subscribe
Spain2054813► Subscribe
Greece880100491► Subscribe
Greece1000254► Subscribe
Hong Kong87893► Subscribe
Ireland882286► Subscribe
Ireland62831► Subscribe
Germany3880762► Subscribe
India166560► Subscribe
Canada1315202► 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:

Daiichi Sankyo
Boehringer Ingelheim
Argus Health
Johnson and Johnson

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