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Sanofi and Regeneron file IPR against Immunex

Mar 23, 2017

Sanofi and Regeneron filed a petition against Immunex, requesting an inter partes review (IPR) of patent 8,679,487.  The petitioners argue that the ‘487 patent is invalid on novelty grounds.  Earlier this month Sanofi and Regeneron filed a complaint in the District Court of Massachusetts, seeking a declaration of non-infringement.