Pursuant to 37 CFR 1.1, correspondence intended for the USPTO must be mailed to P.O. Box 1450, Alexandria, VA 22313-1450, except as otherwise provided.
Here are a few other correspondence address reminders that appeared in the same notice:
1. Correspondence intended for the USPTO, unless directed otherwise, must be
Director of the U.S. Patent and Trademark Office, P.O. Box 1450
Alexandria, VA 22313-1450
2. Correspondence in patent-related matters to organizations reporting to the Commissioner for Patents must be addressed to:Commissioner for Patents P.O. Box 1450 Alexandria, VA 22313-1450
3. Correspondence in trademark-related matters, except documents sent to the
Assignment Services Division for recordation, requests for copies of trademark
documents, and documents directed to the Madrid Processing Unit, must be
addressed to:Commissioner for Trademarks P.O. Box 1451 Alexandria, VA
The above addresses are the USPTOâ€™s three general mailing addresses for mail delivered by the USPS; however, the USPTO has separate mailing addresses for certain correspondence as set forth in the notice titled "Mailing and Hand Carry Addresses for Mail to the United States Patent and Trademark Office" (formerly, "Special Mail Stops For Patent Mail") that is published each week in the Official Gazette Notices and posted on the USPTO Internet web site.
Questions regarding this notice may be e-mailed to PatentPractice@uspto.gov, or directed to the Inventorsâ€™ Assistance Center (formerly the Patent Assistance Center (PAC)) by telephone at 800-786-9199 or 703-308-4357.