The U.S. Patent and Trademark Office (USPTO) issued a final rule on March 20, 2026,
mandating that all applicants, inventors, and patent owners not residing in the United
States must be represented by a USPTO-registered patent attorney or agent for all
patent-related matters, effective July 20, 2026.
The new rule covers the entire process: new application filings, Office Action responses,
information disclosure statements, and post-grant maintenance proceedings. Documents
lacking the signature of a U.S. registered practitioner will be rejected outright, leading to
immediate application denials or procedural delays. The requirement applies even to joint
applications with U.S. co-applicants if any applicant is foreign-domiciled.
This reform aims to enhance application quality, regulate representation practices, and eliminate
non-compliant filings. Global innovators seeking U.S. patent protection must immediately
adjust strategies by engaging qualified U.S. counsel to avoid losing rights and incurring
unrecoverable application costs.
