USPTO Adds Real-Party Disclosure Requirement for Ex Parte Patent Reexamination Requests
The U.S. Patent and Trademark Office has published a new disclosure requirement for parties seeking third-party ex parte patent reexamination. The measure requires identification of all real parties in interest connected to a request, potentially giving patent owners and other participants more information about who is behind a challenge.
The USPTO lists the action as a July 20, 2026 notice titled “Requirement to Identify All Real Parties in Interest to a Third Party Request for an Ex Parte Reexamination.” The notice appeared in the Federal Register on July 22, 2026, under citation 91 FR 46038.
What the notice changes
The requirement concerns third-party requests in the USPTO’s ex parte patent-reexamination process. Its practical effect, according to the agency’s notice listing, is greater disclosure of parties with an interest in a reexamination request, subject to the terms of the notice.
That disclosure could matter when the named requester is not the only party involved in the dispute. Identifying the real parties in interest may help reveal which companies, investors or other organizations have a stake in a patent challenge. The approved materials do not provide the complete notice text, however, so they do not establish the precise information that must be submitted or how the agency will evaluate disclosures.
The change also should not be described as a ban on anonymous patent challenges. The available materials do not confirm that effect. They likewise do not indicate that the USPTO has changed the underlying standard for deciding patentability.
Why patent participants are watching
Patent disputes can involve more than the parties formally named in a filing. Greater visibility into those relationships may affect litigation strategy, financing, licensing negotiations and competitive intelligence in U.S. patent disputes.
For patent owners, knowing who may benefit from a reexamination request could provide additional context when assessing the challenge. For businesses and other entities considering a request, the new disclosure obligation may require closer attention to ownership, funding or other interests connected to the proceeding.
The change is nationwide because USPTO patent-reexamination procedures apply to U.S. patent proceedings. That gives the notice relevance beyond a single company, industry or jurisdiction, even though the available source packet does not identify particular patent owners, requesters or disputes affected by it.
What is known about implementation
The USPTO’s 2026 patent-related-notices catalog identifies the notice and its Federal Register citation. The agency also maintains a separate 2026 procedural calendar and proceeding-record system for the Patent Trial and Appeal Board, but the real-parties-in-interest notice is distinct from the PTAB hearing schedule.
The available materials do not establish whether the requirement applies immediately to pending requests or only to new filings. They also do not provide an effective date, filing instructions, exceptions or enforcement details beyond the notice’s stated disclosure requirement.
Those implementation questions are the next practical issue for patent owners, challengers, counsel and businesses involved in reexamination proceedings. Until the complete notice and its operative details are reviewed, the confirmed development is narrower: the USPTO has announced and published a requirement aimed at identifying all real parties in interest behind a third-party ex parte reexamination request.
The action is an agency notice, not a congressional law or a final court ruling. Its immediate significance is the potential for greater transparency in a part of the U.S. patent system where the identity of interested parties can affect how disputes are understood and managed.
Sources
- Patent-related notices – 2026, U.S. Patent and Trademark Office
- Hearing Schedules, U.S. Patent and Trademark Office
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