In an April 11, 2019 order, Judge Andrews of the District of Delaware ruled that a Hatch-Waxman defendant’s obviousness defenses were precluded under 35 U.S.C. § 315(e)(2) even though the barring PTAB decision issued over a year after the court had held an obviousness trial.  Novartis Pharm. Corp. v. Par Pharm., Inc., No. 14-cv-01289 (D. Del. Apr. 11, 2019), Docket No. 198.  Read on for the details.
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IPR petitioners Proppant Express Investments, LLC and Proppant Express Solutions, LLC (collectively, “PropX”) have a pending instituted inter partes review (IPR) on certain claims of U.S. Patent No. 9,511,929 (“the ’929 patent”).  Unfortunately for PropX, it mistakenly grouped its arguments against one of the dependent claims—claim 4—into the wrong ground, which led the Patent Trial and Appeal Board (the “Board”) to deny institution of IPR of that claim, due to inadequate support.  IPR2017-02103, Paper 19 at 32, 34.  After institution, PropX sought to amend the petition to move claim 4 into the proper ground.  The Board denied PropX’s request because PropX was not diligent: despite Patent Owner’s (“Oren”) Preliminary Response pointing out PropX’s mistake, PropX failed to notice the mistake until after institution.  IPR2017-02103, Paper 22.

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