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Serving leading biopharmaceutical companies globally:

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Generated: October 16, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,900,755

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Summary for Patent: 4,900,755

Title: Controlled release combination of carbidopa/levodopa
Abstract:A matrix or monolithic drug delivery system for the controlled release of carbidopa and levodopa consists of the two drugs uniformly dispersed in a polymer vehicle at a concentration that is greater than the solubility of either drug in the polymer. Treatment of parkinsonism with the controlled release formulation provides several advantages over treatment with the standard carbidopa/levidopa combinations presently employed.
Inventor(s): Dempski; Robert E. (Dresher, PA), Scholtz; Edward C. (King of Prussia, PA), Nibbelink; Donald W. (Lansdale, PA), Reines; Scott A. (New Hope, PA)
Assignee: Merck & Co. (Rahway, NJ)
Application Number:07/315,057
Patent Claim Types:
see list of patent claims
Formulation; Compound; Dosage form;

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International Patent Family for Patent: 4,900,755

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Hong Kong56191► Subscribe
Canada1318602► Subscribe
Cyprus1578► Subscribe
Germany3766308► Subscribe
Germany3875705► Subscribe
Denmark302587► Subscribe
Denmark170514► Subscribe
Denmark685888► Subscribe
Denmark170515► Subscribe
European Patent Office0253490► 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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