The Split on Pleading Scienter for Inequitable Conduct

by David Hricik, Mercer Law School

Federal Rule of Civil Procedure 9(b) requires that fraud or mistake be pled with particularity.  The Federal Circuit has held that, although inequitable conduct is “broader than fraud” inequitable conduct must be pled with particularity in Exergen Corp. v. Wal-Mart Stores, Inc., 575 F.3d 1312, 1330 (Fed. Cir. 2009).  (A digression:  I think this is wrong because the Supreme Court has held that Rule 9(b) is limited to “fraud” and “mistake” and it is improper to rely on judicial policies to expand the plain meaning of the rule.  See David Hricik, Wrong about Everything: The Application by the District Courts of Rule 9(b) to Inequitable Conduct, 86 Marquette Law Review  895 (2003) (here).)

One issue that has split the district courts is whether the “single most reasonable inference” standard for scienter applies at the pleading stage. The court in Deere & Co v. Kinze Mfg., Inc (No. 4:20-cv-00389-RGE-HC, C.D. Iowa May 1, 2023) collected the cases:

iLife Techs. Inc. v. AliphCom, No. 14-CV-03345-WHO, 2015 WL 890347, at *4 n.1 (N.D. Cal. Feb. 19, 2015) (“I recognize that there is currently a dispute among courts as to the pleading requirements for an inequitable conduct counterclaim.”) (collecting cases); see also Wyeth Holdings Corp.

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