During post grant trials before the Patent Trial and Appeal
Board, patent owners can attempt to amend their claims by filing
substitute claims in a motion to amend.
Such a motion can be made contingent on the PTAB finding one or
more original claims unpatentable, such that it effectively
launches a parallel proceeding within the inter partes review or
post grant review trial, with both parties briefing the validity of
the substitute claims concurrently with the patent owner's
response and sur-reply, and the petitioner's reply.
Motions to amend are presumed contingent, unless the patent
owner indicates otherwise or cancels original claims.1
If the PTAB finds the originally challenged claims unpatentable
based on the petition grounds, then the PTAB evaluates the
patentability of the substitute claims over any grounds that the
petitioner raised in opposition to the motion.