U.S. Patent Office Invalidates Seagen Patent in Dispute between Daiichi Sankyo and Seagen
Daiichi Sankyo Co., Ltd. (TSE: 4568) (hereinafter, Daiichi Sankyo) announced today that the U.S. Patent and Trademark Office (U.S. PTO) rendered a Final Written Decision invalidating all claims of Seagen Inc.’s U.S. patent 10,808,039 (the ’039 patent) that were challenged by Daiichi Sankyo in a post-grant review proceeding (PGR).
- Daiichi Sankyo Co., Ltd. (TSE: 4568) (hereinafter, Daiichi Sankyo) announced today that the U.S. Patent and Trademark Office (U.S. PTO) rendered a Final Written Decision invalidating all claims of Seagen Inc.’s U.S. patent 10,808,039 (the ’039 patent) that were challenged by Daiichi Sankyo in a post-grant review proceeding (PGR).
- “We are pleased that the U.S. PTO invalidated all challenged claims of the ’039 patent,” said Naoto Tsukaguchi, Corporate Officer and General Counsel, Daiichi Sankyo.
- On December 23, 2020, Daiichi Sankyo filed a PGR petition with the U.S. PTO contesting the patentability of certain claims of the ’039 patent.
- On April 7, 2022, the U.S. PTO granted Daiichi Sankyo’s request to institute the PGR.