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Serving leading biopharmaceutical companies globally:

Johnson and Johnson
Argus Health
Fish and Richardson
Daiichi Sankyo

Generated: December 17, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,957,924

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Summary for Patent: 4,957,924

Title: Therapeutic valine esters of acyclovir and pharmaceutically acceptable salts thereof
Abstract:The present invention relates to certain amino acid exters of the purine nucleoside acyclovir, pharmaceutically acceptable salts thereof and their use in the treatment of herpes virus infections. The invention also includes pharmaceutical formulations and processes for the preparation of such compounds.
Inventor(s): Beauchamp; Lilia M. (Raleigh, NC)
Assignee: Burroughs Wellcome Co. (Research Traingle Park, NC)
Application Number:07/228,377
Patent Claim Types:
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Compound; Composition; Dosage form; Use;

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Foreign Priority and PCT Information for Patent: 4,957,924

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom8719367Aug 15, 1987

International Patent Family for Patent: 4,957,924

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Finland883757► Subscribe
Finland89713► Subscribe
Denmark170803► Subscribe
Denmark451388► Subscribe
Germany19575021► Subscribe
Denmark82694► Subscribe
Germany3855333► Subscribe
Germany3852682► Subscribe
Spain2087639► Subscribe
Spain2065914► 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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Serving leading biopharmaceutical companies globally:

Queensland Health
US Army

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