TMEP § 108.03
Trademark applicants and registrants should monitor the status of their applications or registrations in cases where a notice or action from the USPTO is expected. Inquiries regarding the status of pending matters should be made during the following time periods:
Should the status inquiry reveal that a document is lost, that no action has been taken regarding correspondence that was submitted, or that some other problem exists, the applicant or registrant must promptly request corrective action. 37 C.F.R. §2.146(i). Failure to act diligently and follow up with appropriate action may result in denial of the requested relief. The USPTO may deny petitions to reactivate abandoned applications and cancelled registrations when a party fails to inquire about the status of a pending matter within a reasonable time. See TMEP §§1705.05 and 1714.01(d).
Written status inquiries are discouraged, because they can delay processing. Whenever possible, status inquiries should be made through the Trademark Status and Document Retrieval (TSDR) database. If additional information regarding the status of an application or registration is required, callers may telephone TAC at (571) 272-9250 or (800) 786-9199.