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Last Updated: October 20, 2021

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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;

Drugs Protected by US Patent 4,968,509

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

International Family Members for US Patent 4,968,509

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2001288 ⤷  Free Forever Trial
Australia 611704 ⤷  Free Forever Trial
Canada 1315202 ⤷  Free Forever Trial
Germany 3880762 ⤷  Free Forever Trial
European Patent Office 0305051 ⤷  Free Forever Trial
Spain 2054813 ⤷  Free Forever Trial
Greece 1000254 ⤷  Free Forever Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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