Pfizer's Viagra Patent Survives Teva Challenge

Law360, New York (August 15, 2011, 1:38 PM EDT) -- A Virginia federal judge on Friday rejected Teva Pharmaceuticals USA Inc.'s bid to sell a generic version of Viagra, ruling that a Pfizer Inc. patent for the blockbuster drug remains valid and enforceable.

U.S. District Judge Rebecca Beach Smith found that the decision to try an orally administered version of the active ingredient, sildenafil, to treat erectile dysfunction was not obvious and that the chemicals covered by the patent-in-suit were sufficiently different from a similar version protected by an earlier Pfizer patent to nix Teva's claim...
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