How should applicants handle status inquiries for PCT applications?

This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.

For status inquiries regarding PCT applications, the MPEP provides specific guidance:

• Inquiries relating to international applications filed under the Patent Cooperation Treaty (PCT) should be directed to the PCT Help Desk.
• The MPEP states: Inquiries relating to international applications (PCT) … should be directed to the PCT Help Desk at 1-800-PTO-9199 or 571-272-4300.
• The PCT Help Desk can provide information on the processing of international applications at the United States Receiving Office (RO/US), United States International Searching Authority (ISA/US), and United States International Preliminary Examining Authority (IPEA/US).

It’s important to use the correct channel for PCT-related inquiries to ensure accurate and timely information.