European Patent Office Affirms Revocation Of Viagra Patent

Law360, New York (February 10, 2005, 12:00 AM EST) -- A generic version of Pfizer’s erectile-dysfunction drug Viagra will reach the shelves of European drug stores after the European Patent Office decided to revoke a method-of-use patent for the drug, capping a seven-year battle between Pfizer and rival drug makers.

In a blow to Pfizer, the EPO affirmed its earlier decision to revoke Pfizer's method-of-use patent containing claims for the use of any PDE inhibitor for the manufacture of an oral treatment for erectile dysfunction.

The ruling was made following a three-day hearing by a Board...
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