In Re KAHOOT! As

• Court: Court of Appeals for the Federal Circuit
• Decided: February 25, 2026
• Docket: 26-119
• Status: Unpublished

Opinion

Case: 26-119 Document: 26 Page: 1 Filed: 02/25/2026

NOTE: This order is nonprecedential.

United States Court of Appeals for the Federal Circuit ______________________

In Re KAHOOT! AS, Petitioner ______________________

2026-119 ______________________

On Petition for Writ of Mandamus to the United States Patent and Trademark Office in No. IPR2025-00696. ______________________

ON PETITION AND MOTION ______________________

Before TARANTO, MAYER, and STARK, Circuit Judges. PER CURIAM. ORDER The Director of the United States Patent and Trade- mark Office denied Kahoot! AS’s petition for inter partes review (“IPR”) of Interstellar Inc.’s patent. In particular, the Director reasoned that the “patent has been in force for over six years, creating strong settled expectations,” and Kahoot! had failed to show IPR would be “an appropriate use of [Patent Trial and Appeal] Board resources under these circumstances.” Appx287. Kahoot! now petitions for a writ of mandamus directing the PTO to vacate and recon- sider without relying on “settled expectations.” Amici Case: 26-119 Document: 26 Page: 2 Filed: 02/25/2026

2 IN RE KAHOOT! AS

move for leave to file briefs in support, and the Director and Interstellar oppose the petition. The standard for mandamus relief is demanding. Ka- hoot! must show, among other things, that it has a clear and indisputable right to the relief it seeks. Cheney v. U.S. Dist. Ct. for D.C., 542 U.S. 367, 380–81 (2004). We cannot say Kahoot! has made that showing here. Given Congress committed institution decisions to the Director’s discretion, even when the statutory pre-condi- tions are present, SAS Inst., Inc. v. Iancu, 584 U.S. 357, 366 (2018); Apple Inc. v. Squires, ___ F.4th ___, 2026 WL 406495, at *1, (Fed. Cir. Feb. 13, 2026), and protected the exercise of that discretion from review by making such de- terminations “final and nonappealable,” 35 U.S.C. § 314(d), we have recognized that, in the absence of colora- ble constitutional claims (which are not raised here), man- damus is ordinarily unavailable for review of institution decisions. Mylan Lab’ys Ltd. v. Janssen Pharmaceutica, N.V., 989 F.3d 1375, 1382 (Fed. Cir. 2021). Kahoot! argues that reliance on purported “settled ex- pectations” exceeds the Director’s statutory authority. But, on that challenge, its entitlement to relief is anything but clear, as our cases have held these kinds of “ultra vires ar- gument[s] cannot be a basis for granting the petition for mandamus.” Id. at 1382–83; see also In re Motorola Sols., Inc., 159 F.4th 30, 38 (Fed. Cir. 2025); Apple Inc. v. Vidal, 63 F.4th 1, 12 (Fed. Cir. 2023) (noting § 314(d)’s bar on re- view applies to challenges that “focus directly and ex- pressly on institution standards”). Given our limits on review and the demanding standard for relief, we deny the petition. Accordingly, Case: 26-119 Document: 26 Page: 3 Filed: 02/25/2026

IN RE KAHOOT! AS 3

IT IS ORDERED THAT: (1) The amici motions are granted. (2) The petition is denied. FOR THE COURT

February 25, 2026 Date