Supreme Court Rejects Federal Circuit's Insolubly Ambiguous Indefiniteness Standard | Practical Law
In Nautilus, Inc. v. Biosig Instruments, Inc., the US Supreme Court rejected the US Court of Appeals for the Federal Circuit's "insolubly ambiguous" standard for determining whether a patent claim is invalid for indefiniteness under 35 U.S.C. § 112, ¶ 2. The Supreme Court announced a new standard, holding that a claim is invalid for indefiniteness if it fails to inform a person skilled in the art of the invention's scope when read in light of the specification and prosecution history.