Watson Confirms Amphastar Patent Lawsuit - PR Newswire - sacbee.com

(NYSE: WPI) today confirmed that Momenta Pharmaceuticals, Inc. and Sandoz Inc. have filed suit against Amphastar Pharmaceuticals, Inc. and Watson on September 21, 2011 in the United States District Court for the District of Massachusetts. The suit alleges that Amphastar's Enoxaparin Sodium Injection product, which Watson has the exclusive right to distribute in the U.S. retail pharmacy channel, infringes Momenta's U.S. Patent Nos. 7,790,466 and 7,575,886...