Law360 (May 26, 2020, 9:34 PM EDT) -- The Federal Circuit on Tuesday upheld a Patent Trial and Appeal Board decision that struck down a Solenis Technologies LP paper-making patent for being obvious, finding that the board properly analyzed the claims and backed its conclusions with "substantial evidence."

In a 13-page nonprecedential opinion, a three-judge panel affirmed the PTAB's decision not to revisit its rejection of Solenis' patent, which taught a process for making paper by using an aqueous "cellulosic stock" that clumps with the addition of certain water-soluble polymers.

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