Palo Alto Networks, Inc. has filed a new inter partes review petition at the Patent Trial and Appeal Board, opening IPR2026-00362 on May 15, 2026. For patent litigators and in-house IP teams, this is the kind of proceeding worth watching early: even before the Board decides whether to institute review, the petition can offer a detailed roadmap of invalidity theories, claim-prioritization strategy, and the petitioner’s broader litigation posture.
At this stage, the publicly available case caption identifies Palo Alto Networks, Inc. as the petitioner, but the docket summary provided here does not specify the challenged patent number, the patent owner, or the exact unpatentability grounds asserted. In a newly filed IPR, those details typically appear in the petition, mandatory notices, and accompanying exhibits. Once those filings are available, practitioners will want to focus on which claims are targeted, whether the petition relies on anticipation, obviousness, or both under 35 U.S.C. §§ 102 and 103, and how the petitioner frames its claim constructions and motivations to combine prior art.
Those details matter because institution outcomes often turn less on the existence of prior art in the abstract and more on how precisely the petition maps that art to the challenged claims. If Palo Alto Networks is attacking a patent in the cybersecurity, network security, or software infrastructure space, the case may also raise familiar PTAB issues involving functional claim language, combinations of technical references, and the use of expert declarations to bridge gaps in the prior art.
From a strategic perspective, counsel should monitor whether the patent owner files a preliminary response that emphasizes discretionary denial, parallel district court litigation, real-party-in-interest disputes, or claim-construction issues. Timing can be especially important where there are co-pending infringement actions, because institution decisions may influence settlement leverage, stays, and downstream estoppel considerations.
For patent prosecutors, this proceeding may become a useful study in how software and security-related claims are tested against prior art at the PTAB. For litigators, it may reveal how a major technology company is using the Board to challenge patent risk. And for portfolio managers, it is another reminder that patents in crowded technical fields must be drafted and defended with PTAB scrutiny in mind.
As the docket develops, this case should provide a clearer picture of the challenged patent, the patent owner’s response, and whether the Board views the petition as strong enough to warrant institution.