Patent Cooperation Treaty Helpdesk


The Patent Cooperation Treaty (PCT) is an international agreement among intellectual property offices and intergovernmental authorities regarding the process of international patent applications. Please contact the PCT Helpdesk for questions and information concerning the PCT and filing a PCT application.

Assistance is available Monday through Friday (except federal holidays) from 8:30 a.m. to 5 p.m. ET.

Phone: 571-272-4300 (local)