What should applicants do if they receive no response to a status inquiry?

If an applicant receives no response to a status inquiry, the MPEP provides the following guidance:

• The MPEP states: If after a reasonable amount of time no reply has been received, applicants may contact the TC customer service center or CRU.
• For regular patent applications, contact the Technology Center (TC) customer service center at (571) 272-3900.
• For reexamination proceedings, contact the Central Reexamination Unit (CRU) at (571) 272-7705.
• When following up, provide all relevant information, including application number, filing date, and any previous communication references.

It’s important to allow a reasonable time for a response before escalating the inquiry, and to use the appropriate contact channels as specified in the MPEP.

To learn more:

• status inquiries
• follow-up
• Technology Center
• Central Reexamination Unit