[authors: Courtenay C. Brinckerhoff, Jeanne M. Gills, Stephen B. Maebius]

A patent applicant who is denied a patent after appealing to the U.S. Patent and Trademark Office’s Board of Appeals and Interferences has the option of either appealing directly to the Federal Circuit or proceeding with a challenge in district court under 35 USC § 145 (§145 Civil Action). On Wednesday, April 18, 2012, the U.S. Supreme Court decided Kappos v. Hyatt (No. 10-1219), which raised questions regarding the ability to introduce new evidence and the applicable standard of review when a patent applicant brings such a §145 Civil Action. The Court affirmed the decision of the en banc Federal Circuit, holding that “there are no evidentiary restrictions beyond those already imposed by the Federal Rules of Evidence and the Federal Rules of Civil Procedure,” and that “when new evidence is presented on a disputed question of fact,” the district court must “make a de novo finding.” The Court agreed with the Federal Circuit that the district court may “consider whether the applicant had an opportunity to present the evidence to the PTO” when deciding how much weight the new evidence should be given. This decision will be welcomed by patent applicants who have received negative PTO decisions on patentability, and reflects the realities — and difficulties — of marshalling evidence during patent prosecution. For example, the Court’s ruling opens the door for a district court to consider certain types of new evidence (such as live witness testimony) in a §145 Civil Action that cannot be presented before the PTO, as well as other evidence that may not have been available to be presented during the PTO proceedings.