En Banc Federal Circuit To Reconsider Scope of Intervening Rights Defense

Patent Law Blog (Patently-O):
By Dennis Crouch

Marine Polymer Tech. v. HemCon, Inc. (Fed. Cir. 2011)

The Court of Appeals for the Federal Circuit has announced that it will hold an en banc rehearing of the Marine Polymer Tech case. Straying from its recent practice, the Court has not suggested any particular questions that it will address nor did the Court offer to receive friend-of-the-court briefs filed without leave. Thus, under the Federal Circuit rules of practice, any amicus curiae may file a brief only with either (1) leave of court or (2) leave of all parties to the appeal. (Fed. Cir. R. 29).

The initial appellate decision focused on the potential for intervening rights created by patentee arguments… made during reexamination. Here, the court held that that a narrowing claim construction argument made by the patentee in a reexamination gives rise to absolute intervening rights for an accused infringer’s products made or sold prior to the reexamination request. An important quirk of the case is that the narrow construction that the patentee suggested to the PTO was the same construction that had been ordered by a district court in this case. Thus, at the time, the argued-for construction was seen as the true construction rather than a narrowing construction. However, the argued-for construction became narrowing after-the-fact once the Federal Circuit rejected the lower court’s construction as unduly narrow.

The majority opinion was written by Judge Dyk and Joined by Senior Judge Gajarsa. Judge Lourie filed a dissent that looked to the patent statute for guidance on the legal scope of intervening rights. He argued that the statute does not create intervening rights based upon arguments but rather only apply to “amended or new claims.” See 35 U.S.C. §§ 307(b), 316(b), and 252.

The question suggested by the plaintiff-appellate

Published:
21.01.12
Category:
IP News