The United States Patent and Trademark Office (USPTO) has proposed a rule that would require third-party requesters of ex parte reexaminations to disclose all real parties in interest (RPI) to the Office. This proposal, published on July 22, 2026, aims to enhance transparency and ensure compliance with statutory estoppel provisions established under the America Invents Act (AIA).
Historically, third parties could anonymously request ex parte reexaminations of issued patents, allowing them to challenge patent validity without revealing their identities. This anonymity has been particularly advantageous for entities seeking to contest patents without exposing themselves to potential litigation or business repercussions. However, the USPTO’s new proposal seeks to balance this anonymity with the need for accountability and adherence to legal constraints.
The proposed rule addresses concerns that anonymous reexamination requests could be used to circumvent estoppel provisions. Under the AIA, parties who have challenged a patent claim through inter partes review (IPR) or post-grant review (PGR) and received a final written decision are barred from requesting or maintaining subsequent proceedings on the same claim. By requiring disclosure of all RPIs, the USPTO aims to prevent entities from anonymously initiating reexaminations that could violate these estoppel provisions.
Reactions to the proposal have been mixed. Patent owners and their advocates have expressed support, viewing the rule as a necessary step to prevent abuse of the reexamination process and to uphold the integrity of patent rights. They argue that transparency in identifying RPIs will deter entities from repeatedly challenging patents through anonymous filings, thereby reducing frivolous or harassing reexamination requests.
Conversely, some industry groups and legal practitioners have raised concerns about the potential impact on the ability to challenge questionable patents. They contend that the option to file reexamination requests anonymously has been a valuable tool for smaller entities or those wary of retaliation. Requiring RPI disclosure could deter legitimate challenges due to fears of exposure and subsequent legal or commercial consequences.
The USPTO has invited public comments on the proposed rule, with a deadline of August 21, 2026. Stakeholders are encouraged to provide feedback on how the requirement for RPI disclosure might affect the reexamination process and the broader patent landscape.
This development reflects the USPTO’s ongoing efforts to refine post-grant proceedings and ensure that mechanisms like ex parte reexamination are used appropriately. By proposing this rule, the Office seeks to strike a balance between maintaining a robust system for challenging patent validity and preventing potential abuses that could undermine the patent system’s integrity.
As the comment period progresses, it remains to be seen how the USPTO will address the diverse perspectives from the patent community and whether the final rule will incorporate modifications based on stakeholder input.