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Last Updated: November 12, 2019

DrugPatentWatch Database Preview

Details for Patent: 6,419,953

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Which drugs does patent 6,419,953 protect, and when does it expire?

Patent 6,419,953 protects DEPAKOTE ER and is included in one NDA.

Protection for DEPAKOTE ER has been extended six months for pediatric studies, as indicated by the *PED designation in the table below.

This patent has forty patent family members in twenty-seven countries.

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 Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 6,419,953
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
Abbvie DEPAKOTE ER divalproex sodium TABLET, EXTENDED RELEASE;ORAL 021168-001 Aug 4, 2000 AB RX Yes Yes   Start Trial   Start Trial   Start Trial
>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   Start Trial
Austria 254907   Start Trial
Austria 275398   Start Trial
Australia 2002239260   Start Trial
Australia 2478900   Start Trial
Bulgaria 105665   Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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Serving leading biopharmaceutical companies globally:

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