Amgen has told Janssen of its intention to launch its proposed biosimilar to Janssen’s Stelara (ustekinumab) in the US as early as May 2023 – prompting the originator to file suit against the California-based biotech alleging infringement of two of its ustekinumab patents, including its compound patent that issued 17 years ago.
The suit filed by Janssen Biotech in a Delaware district court claims that, on information and belief, Amgen filed its...






