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Details for Patent: 5,962,461

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Patent 5,962,461 protects PRIMSOL and is included in one NDA.

This patent has eleven patent family members in eleven countries.

This patent has expired prematurely due to non-payment of maintenance fees. See details below.

Summary for Patent: 5,962,461

Title: Pleasant-tasting aqueous liquid composition of a bitter-tasting drug
Abstract:A liquid pharmaceutical composition is contemplated that comprises a pharmaceutically effective amount of a bitter tasting drug dissolved or dispersed in an aqueous medium that is free of ethanol. That aqueous medium consists essentially of water, about 5 to about 30 weight percent polyvinylpyrrolidone, about 35 to about 55 weight percent of a C.sub.3 -C.sub.6 polyol, about 0.01 to about 0.5 weight percent ammonium glycyrrhizinate and one or more flavorants. The liquid composition is transparent and has a pleasant taste. The bitter tasting drugs claimed herein are vitamin and mineral preparations, trimethoprim, and guaifenesin.
Inventor(s): Anaebonam; Aloysius O. (Burlington, MA), Clemente; Emmett (Manchester, MA), Fawzy; Abdel A. (Groton, MA)
Assignee: Ascent Pediatrics, Inc. (Billerica, MA)
Application Number:09/011,156
Patent Claim Types:
see list of patent claims
Composition; Delivery;
Patent Metrics:
Source: PatentQuant.com
Field: Not categorized
Back Citations: 6th percentile
Forward Citations: 1st percentile

Applicant Tradename Generic Name Dosage NDA Approval Date Type RLD Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use
Aytu Bioscience Inc
PRIMSOL
trimethoprim hydrochloride
SOLUTION;ORAL074973-001Jan 24, 2000RXYes5,962,461► subscribe
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Premature patent expiration for: 5,962,461

Expiration due to failure to pay maintenance fee

Patent Number Expiration Date
5,962,461 October 05, 2011

Foreign Priority and PCT Information for Patent: 5,962,461

PCT Information
PCT FiledAugust 07, 1997PCT Application Number:PCT/US97/14018
PCT Publication Date:February 12, 1998PCT Publication Number: WO98/05312

Non-Orange Book Patents for Patent: 5,962,461

For Orange Book-listed patents (shown in the main table above) generic applications must certify that the listed patents are expired, invalid, or will not be infringed by generic entry.

The non-Orange Book patents listed below do not require formal certifications, so they do not automatically impede generic entry. Instead, they represent potential opportunities for branded firms to block generic entry through patent infringment challenges.

Patent No. Title Estimated Patent Expiration
5,763,449 Pleasant-tasting aqueous liquid composition of a bitter-tasting drug► subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Because of the complexity of determining patent expiration dates it is advisable to have patent counsel verify freedom to operate.

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International Patent Family for Patent: 5,962,461

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria236624► subscribe
Australia3913297► subscribe
Australia727175► 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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