Request for Extension of Time to File a Statement of Use
Extension Request - a sworn statement signed by the owner or a person authorized to sign on behalf of the owner, stating that the applicant still has a bona fide intention to use the mark in commerce, and needs additional time to use the mark in commerce. A filing fee per class of goods/services must accompany the Extension Request. (see the current fee schedule at How to Pay Fees to determine the current fee for Code 6004/7004).
The Extension Request, if granted, gives the owner an additional six (6) months to either: (1) use the mark in commerce and file a Statement of Use; or (2) file another Extension Request.
You may continue to file Extension Requests every six (6) months. However, you must use the mark and file a Statement of Use within three (3) years of the issue date of the Notice of Allowance. The USPTO will not register a mark if, after thirty-six (36) months of the issue date of the Notice of Allowance, a Statement of Use has not been filed.
Source: U.S. Patent and Trademark Office.