15 CFR § 280.321
Notification of changes of address
April 14, 2021
The applicant for recordal or the holder of a certificate of recordal shall notify the Director, USPTO, of any change of address or change of name no later than six months after the change. The holder must do so whether the certificate of recordal is in an active or inactive status.
[61 FR 50558, Sept. 26, 1996. Redesignated and amended at 65 FR 39803, 39804, June 28, 2000]