WASHINGTON, April 16 A federal appeals court has
ruled against Bayer AG, reversing a ruling by a
lower court and finding that parts of a patent for the German
drugmaker's Yaz oral contraceptive were invalid.
The U.S. Court of Appeals for the Federal Circuit ruled on
Tuesday that a district court in Nevada had erred in finding two
claims of a patent for the contraceptive to be "not invalid."
It reversed the ruling.
The generic companies involved in the ruling, Watson
Pharmaceuticals, which now goes by the name Actavis Inc,
Sandoz Inc - the generic drug unit of Novartis - and
Lupin Ltd, had argued that the patent was invalid and
had told the U.S. Food and Drug Administration that they planned
to bring out generic versions of the contraceptive.
The patent expires on June 30, 2014, the ruling said.