On January 25, 2018, the U.S. Patent and Trademark Office released Revision 8.2017 of the Ninth Edition of the MPEP. Chapters 200, 700-1000, 1200, 1400, 1500, 1800, 2000-2300, 2500, and 2700 of the MPEP include substantive revisions in the recent release. Find out more about the revisions here.