Posts Tagged: "intervening rights"

Where the en banc decision gets particularly interesting (and adversarial) is with respect to the second question, namely when does “intervening rights” apply to reexamined claims? By a 6 to 4 vote, (and a reversal of the panel decision), a majority of the en banc Federal Circuit also concluded “as an alternative ground for affirmance” of the district court’s judgment that “intervening rights do not apply to claims that have not been amended and are not new.” The majority opinion by Judge Lourie (the dissenter in the panel decision) was joined by Chief Judge Rader, and Judges Newman, Bryson, Prost, and Linn (who was one of the 5 “nay” votes on the meaning “biocompatible). The dissenting opinion on the “intervening rights” question by Judge Dyk (who wrote the majority opinion in the panel decision) was joined by Senior Judge Gajarsa (who also joined the majority opinion in the panel decision), Judge Reyna, and Judge Wallach.

On September 26, 2011, the a three-judge-panel of the United States Court of Appeals for the Federal Circuit issued a ruling in Marine Polymer Technologies, Inc. v. HemCon, Inc., which found intervening rights due to certain patent claims due to the fact that Marine Polymer made arguments about claim language during reexamination, but without actually amending the claims. See Marine Polymer vacated opinion. On January 20, 2012, the full Federal Circuit decided to hear this case en banc and ordered that the original panel decision be vacated and the appeal reinstated. No additional briefing by the parties was requested, but on January 26, 2012, the Federal Circuit issued an Order allowing amicus briefs to be filed on or before February 10, 2012. On February 10, 2012 the Biotechnology Industry Organization and Pharmaceutical Research and Manufacturers of America filed a joint Amici Curiae Brief supporting the appellee and seeking affirmance of the district court decision.

Companies accused of patent infringement are increasingly looking at patent reexamination at the Patent Office as an attractive avenue for challenging the patent’s validity. Reexamination offers a number of well-known advantages as a forum for such validity challenges over District Court, among them the absence of a presumption of validity and a lower burden of proof. Less well-known, however, is the potential for reexamination to eliminate an accused infringer’s liability for past damages – even if the PTO confirms the validity of a patent in reexamination, the accused infringer might be entitled to “intervening rights,” effectively eliminating past damages, if the patent owner amends its claims to distinguish its invention over the prior art. This possibility of “intervening rights” received a big boost last week with the CAFC’s decision in Marine Polymer Techs. v. HemCon, finding that such rights may be created even without an amendment of the claims if the patent owner presents arguments in reexamination that “effectively amend” the claims.

I like writing about esoteric patent law topics and the question of “intervening rights” in reexaminations/reissues is one of the more esoteric. See my 1998 JPTOS article entitledIntervening Rights: A Potential Hidden Trap for Reexamined Patent. The case of Marine Polymer Technologies, Inc. v. HemCon, Inc. is one of those rare instances in this esoteric area of patent law where the Federal Circuit announced a new “wrinkle” on when “intervening rights” apply in reexamination. Unfortunately, the rule announced by the majority in Marine Polymer Technologies (“intervening rights” apply to unamended claims based on statements made during reexamination) is squarely in conflict with the express language of 35 U.S.C. § 307(b), as Judge Lourie’s dissent vigorously (and more importantly, correctly) points out.