Three weeks after FDA approved Amgen Inc.'s biosimilar to Genentech Inc.'s Avastin (bevacizumab), the companies have launched opposing suits against each other. Amgen is seeking a declaratory judgment that its product Mvasi (bevacizumab-awwb) does not infringe 27 patents related to Avastin while Genentech is claiming infringement.
Amgen's suit is unusual in the young annals of biosimilar litigation in that it's the sponsor of the follow-on product,...






