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Amici back Sandisk challenge to US PTAB’s settled expectations rule

By Nick Robertson ( September 23, 2025, 20:35 GMT | Insight) -- Three groups of amici filed motions to appear before the US Court of Appeals for the Federal Circuit this week backing SanDisk Technologies’ and Western Digital’s mandamus petition challenging the Patent Trial and Appeals Board’s settled expectations discretionary-denial factor.SanDisk Technologies’ and Western Digital’s attempt to challenge the Patent Trial and Appeals Board’s discretionary-denial factors has garnered multiple amici in the days since its filing last Thursday. Former US Patent and Trademark Office Acting Director Joe Matal — representing a group of trade organizations — Unified Patents and a group of law professors each urged the US Court of Appeals for the Federal Circuit to grant the petition....

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