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Serving leading biopharmaceutical companies globally:

Chinese Patent Office
Federal Trade Commission
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Generated: November 19, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,753,802

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Summary for Patent: 4,753,802

Title: Verapamil dosage form
Abstract:An osmotic dosage form comprising verapamil and mannitol in a nonequilibrium ratio.
Inventor(s): Stephens; Sally I. (Mt. View, CA), Hamel; L. G. (Sunnyvale, CA)
Assignee: Alza Corporation (Palo Alto, CA)
Application Number:06/841,144
Patent Claim Types:
see list of patent claims
Dosage form; Delivery; Composition;

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International Patent Family for Patent: 4,753,802

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria59549► Subscribe
Australia587307► Subscribe
Australia6871587► Subscribe
Canada1261703► Subscribe
Germany3766858► Subscribe
European Patent Office0238189► Subscribe
Greece3001290► Subscribe
JapanH0798748► Subscribe
JapanS62226924► Subscribe
South Korea900003385► 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:

Johnson and Johnson
US Department of Justice
Daiichi Sankyo
Harvard Business School
Express Scripts
Argus Health

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