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Last Updated: July 28, 2021

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Details for Patent: 6,419,953


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Summary for Patent: 6,419,953
Title: Controlled release formulation of divalproex sodium
Abstract:The present invention pertains to a hydrophilic matrix tablet suitable for the once-a-day administration of valproate compounds such as divalproex sodium. The tablet comprises from about 50 weight percent to about 55 weight percent of an active ingredient selected from the group consisting of valproic acid, a pharmaceutically acceptable salt or ester of valproic acid, divalproex sodium, and valpromide; from about 20 weight percent to about 40 weight percent hydroxypropyl methylcellulose; from about 5 weight percent to about 15 weight percent lactose, from about 4 weight percent to about 6 weight percent microcrystalline cellulose, and from about 1 weight percent to about 5 weight percent of silicon dioxide; all weight percentages based upon the total weight of the tablet dosage form. Other aspects of the invention relate to the use of this formulation in the treatment of epilepsy and to methods for manufacturing this dosage form.
Inventor(s): Qiu; Yihong (Gurnee, IL), Poska; Paul Richard (Mundelein, IL), Cheskin; Howard S. (Glencoe, IL), Bollinger; J. Daniel (Libertyville, IL), Engh; Robert K. (Kenosha, WI)
Assignee: Abbott Laboratories (Abbott Park, IL)
Application Number:09/216,650
Patent Claim Types:
see list of patent claims
Compound; Dosage form; Formulation; Composition; Use;

Drugs Protected by US Patent 6,419,953

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 6,419,953

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 021443 ⤷  Free Forever Trial
Austria 254907 ⤷  Free Forever Trial
Austria 275398 ⤷  Free Forever Trial
Australia 2002239260 ⤷  Free Forever Trial
Australia 2478900 ⤷  Free Forever Trial
Bulgaria 105665 ⤷  Free Forever Trial
Brazil 9916361 ⤷  Free Forever Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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