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Details for Patent: 7,138,524

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Summary for Patent: 7,138,524

Title:Processes for preparing anhydrous and hydrate forms of antihistaminic piperidine derivatives, polymorphs and pseudomorphs thereof
Abstract:The present invention is related to novel processes for preparing anhydrous and hydrated forms of piperidine derivatives, polymorphs and pseudomorphs thereof of the formulas ##STR00001## which are useful as antihistamines, antiallergic agents and bronchodilators.
Inventor(s): McCarty; Frederick J. (Hilton Head Island, SC), Carr; Albert A. (Cincinnati, OH)
Assignee: Aventis Pharmaceuticals, Inc. (Bridgewater, NJ)
Application Number:10/162,011
Patent Claim Types:
see list of patent claims
Compound;
Patent Metrics:
Source: PatentQuant.com
Field: Organic fine chemistry
Back Citations: 39th percentile
Forward Citations: 5th percentile

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Premature patent expiration for: 7,138,524

Expiration due to failure to pay maintenance fee

Patent Number Expiration Date
7,138,524 November 21, 2014

International Patent Family for Patent: 7,138,524

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria220667► subscribe
Australia2426595► subscribe
Australia693892► 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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