Key Takeaways
- Effective Date: July 20, 2026.
- Who Is Affected: Patent applicants and patent owners domiciled outside the United States and its territories.
- What Is Required: Most papers filed with the USPTO on or after July 20, 2026, must be submitted through a USPTO-registered patent practitioner.
- Applies to Existing Matters: The requirement applies regardless of when the patent application was filed or when the patent issued.
- Recommended Action: Review pending U.S. patent matters now and establish U.S. representation well before upcoming deadlines.
Effective July 20, 2026, the United States Patent and Trademark Office (USPTO) will require patent applicants and patent owners who are domiciled outside the United States and its territories to be represented by a USPTO-registered patent practitioner in communications with the Office. The new requirement reflects a broader trend toward harmonization of patent practice among the world’s leading intellectual property offices.
What Is Changing?
Beginning July 20, 2026, papers submitted to the USPTO on behalf of a foreign-domiciled patent applicant or patent owner generally must be signed by a USPTO-registered patent attorney or patent agent. The requirement applies to all papers received on or after July 20, 2026, regardless of when the underlying patent application was filed or patent issued.
Why the Change?
Historically, the USPTO permitted certain foreign-domiciled applicants and patent owners to communicate directly with the Office or through foreign patent counsel without retaining a USPTO-registered practitioner. This differed from long-standing practice before many other patent offices, including the European Patent Office and the Japan Patent Office, where local representation has generally been required. According to the USPTO, the new rule is intended to improve examination quality, administrative efficiency, reduce backlog, deter fraud and misrepresentation, and bring U.S. practice into closer alignment with international norms. The change also addresses a long-standing practical imbalance under which U.S. practitioners generally had to work through local counsel abroad while foreign applicants often had greater flexibility before the USPTO.
Who Is Affected?
The requirement applies to patent applicants and patent owners whose domicile is outside the United States or its territories, including foreign corporations, universities, research institutions, individual inventors, foreign subsidiaries owning U.S. patent assets, and other non-U.S. entities involved in USPTO proceedings.
What Types of Matters Are Covered?
The rule broadly applies to patent prosecution, Office Action responses, continuation practice, reissue, reexamination, maintenance matters, post-issuance proceedings, and other communications with the USPTO requiring representation.
Practice Note: Understanding ‘Foreign Domicile’
A U.S. mailing address, subsidiary, distributor, or branch office does not necessarily make an applicant U.S.-domiciled. Individuals are generally domiciled where they maintain their permanent legal residence. Business entities are generally domiciled where their principal place of business is located, meaning where senior executives direct and control the organization’s activities. Many multinational companies with significant U.S. operations may nevertheless be considered foreign-domiciled. If there is uncertainty regarding domicile, the issue should be resolved before papers are filed after July 20, 2026.
Recommended Action
Foreign applicants and patent owners should review all pending U.S. patent matters promptly. If responses, maintenance filings, assignments, reissue applications, or other submissions will be due after July 20, 2026, arrangements should be made now to ensure that a USPTO-registered patent practitioner has adequate time to review and prepare the required filings.
Leech Tishman regularly represents clients throughout the world before the USPTO and works closely with foreign patent firms to coordinate U.S. patent prosecution, portfolio management, and post-grant proceedings. Our team is prepared to discuss how this procedural change may affect your portfolio and assist in ensuring compliance with the new requirements. For more information or assistance, please contact John Christopher, Partner in Leech Tishman’s Intellectual Property Practice Group.