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Ambiguous Indefiniteness

Foley & Lardner LLP

Court Finds Dow Claims Clearly Indefinite

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In Dow Chemical Co. v. Nova Chemicals Corp., the Federal Circuit held claims reciting a limitation that could be calculated in several ways indefinite where the patent claims, specification, and prosecution history failed to...more

McDonnell Boehnen Hulbert & Berghoff LLP

In re Packard (Fed. Cir. 2014)

Often times it appears that, serendipitously or by design, the Federal Circuit issues an opinion on an aspect of patent law that the Supreme Court is also considering. And sometimes the shadow of the Court's impending...more

Foley & Lardner LLP

Federal Circuit Holds That Patent Indefiniteness Requires Insoluble Ambiguousness

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In Biosig Instruments, Inc. v. Nautilus Inc., the Federal Circuit reversed the district court’s finding that the claims at issue were invalid as indefinite, because the claims were not “insolubly ambiguous.” This case...more

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