For general information, mailing addresses, Internet addresses, and contact information for other USPTO services. General Support is available Monday through Friday from 8:30 a.m. to 8 p.m. ET (except federal holidays).
Technical Support is available Monday through Friday 5:30 a.m. to midnight ET and Saturday and Sunday 5:30 a.m. to 10 p.m. ET. (select option # 3). Closed on Thanksgiving, Christmas and New Years.
800-786-9199 (toll-free) | 571-272-1000 (local) | 800-877-8339 (TTY)