Avastin Biosimilar Battle: Amgen, Genentech File Dueling Suits

Amgen seeks declaratory judgement that its biosimilar Mvasi does not infringe 27 Genentech patents, has Genentech suit put under seal; Amgen gave 180-day commercial marketing notice on Oct. 6.

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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,...

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