Barr Sues Watson Over Seasonique Patent

Law360, New York (March 5, 2008, 12:00 AM EST) -- A Barr Pharmaceuticals Inc. subsidiary has filed suit against Watson Laboratories Inc., alleging infringement of a patent covering the oral contraceptive Seasonique and seeking to block Watson from selling a generic version before the patent expires in 2024.

Barr announced Wednesday that Duramed Pharmaceuticals Inc. had lodged the suit, asserting a patent that the U.S. Patent and Trademark Office issued on Jan. 22.

Watson notified Barr in January that it had filed an abbreviated new drug application related to Seasonique and had amended its application to...
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