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A New Strain Of Inequitable Conduct Litigation

Law360, New York (October 5, 2017, 12:06 PM EDT) -- In July, a split panel of the Federal Circuit upheld the district court’s use of an adverse inference from litigation misconduct to hold a patent unenforceable for inequitable conduct. The Federal Circuit’s decision in the case, Regeneron Pharmaceuticals Inc. v. Merus NV,[1] raises interesting questions about the relationship between attorney misconduct during litigation (which is not supposed to affect the enforceability of a patent) and misconduct during prosecution of the patent (which can). Because the court’s opinion gives no clear answer to these questions, it opens...
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