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Fowl Play: Federal Circuit Rules “About” Too Vague to Fly

Summary by LexBlog
In a recent precedential decision from the Federal Circuit, the appellate court explained that words of approximation like “about” are not inherently definite or indefinite — but when a patentee fails to provide sufficient guidance as to the meaning of such terms, it can be fatal to the claims. More specifically, in Enviro Tech Chemical Services, Inc. v. Safe Foods Corp., the court affirmed the lower court’s determination that all asserted claim…
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LexBlog broke the news on Thursday, May 7, 2026.
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