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Serving hundreds of leading biopharmaceutical companies globally:

Julphar
Medtronic
AstraZeneca
Cipla
Fuji
Accenture
McKinsey
Merck
Federal Trade Commission

Generated: May 21, 2018

DrugPatentWatch Database Preview

Details for Patent: 4,820,522

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Summary for Patent: 4,820,522
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:07/078,138
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 4,820,522
Patent Claim Types:
see list of patent claims
Compound; Dosage form; Process; Composition; Formulation;

Drugs Protected by US Patent 4,820,522

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted
Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted

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International Family Members for US Patent 4,820,522

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 0305051 ➤ Try a Free Trial
Spain 2054813 ➤ Try a Free Trial
Greece 880100491 ➤ Try a Free Trial
Greece 1000254 ➤ Try a Free Trial
Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration

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Serving hundreds of leading biopharmaceutical companies globally:

Fish and Richardson
Johnson and Johnson
Chubb
Cerilliant
UBS
QuintilesIMS
McKesson
US Department of Justice
AstraZeneca

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