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Details for Patent: 6,723,340

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Patent 6,723,340 protects GRALISE, GLUMETZA, and INVOKAMET XR, and is included in three NDAs. There have been zero Paragraph IV challenges on Gralise and Glumetza There are two tentative approvals for the compound protected by this patent. Additional details are available via the generic ingredient links below.

This patent has eleven patent family members in eight countries.

Summary for Patent: 6,723,340

Title: Optimal polymer mixtures for gastric retentive tablets
Abstract:Unit dosage form tablets for the delivery of pharmaceuticals are formed of the pharmaceutical dispersed in a solid unitary matrix that is formed of a combination of poly(ethylene oxide) and hydroxypropyl methylcellulose. The combination offers unique benefits in terms of release rate control and reproducibility while allowing both swelling of the tablet to effect gastric retention and gradual disintegration of the tablet to clear the tablet from the gastrointestinal tract after release of the drug has occurred.
Inventor(s): Gusler; Gloria (Cupertino, CA), Berner; Bret (El Granada, CA), Chau; Mei (Sunnyvale, CA), Padua; Aimee (Daly City, CA)
Assignee: DepoMed, Inc. (Menlo Park, CA)
Application Number:10/029,134
Patent Claim Types:
see list of patent claims
Formulation; Compound; Dosage form;
Patent Metrics:
Source: PatentQuant.com
Field: Pharmaceuticals
Back Citations: 15th percentile
Forward Citations: 2nd percentile

Applicant Tradename Generic Name Dosage NDA Approval Date Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use
Depomed Inc
TABLET;ORAL022544-001Jan 28, 2011RXYesYes6,723,340► subscribeY
Depomed Inc
TABLET;ORAL022544-002Jan 28, 2011RXYesYes6,723,340► subscribeY
Santarus Inc
metformin hydrochloride
TABLET, EXTENDED RELEASE;ORAL021748-001Jun 3, 2005RXYesNo6,723,340► subscribeYY
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International Patent Family for Patent: 6,723,340

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
MexicoPA04003793► subscribe
Japan2013006863► subscribe
Japan5133495► 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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