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ARTICLE · 07 APRIL 2024

Specification Support For Numerical Range Endpoints

In RAI Strategic Holdings, Inc. v. Philip Morris Prods. S.A.,[1] (RAI), the United States Court of Appeals for the Federal Circuit (CAFC) vacated and remanded the Patent Trial and Appeal Board's (PTAB)...

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In RAI Strategic Holdings, Inc. v. Philip Morris Prods. S.A.,1 (RAI), the United States Court of Appeals for the Federal Circuit (CAFC) vacated and remanded the Patent Trial and Appeal Board's (PTAB) determination that the phrase "[a heating member] present on the heating projection along a segment having a length of about 75% to about 85% of a length of the disposable aerosol forming substance" of claims 10 and 27 of U.S. Patent No. 10,492,542 lacks support in the written description. This decision serves to reinforce the existing legal standard that a claimed numerical range may be implicitly supported considering the knowledge of a person having ordinary skill in the art, rather than being expressly supported by the written description.

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