In the course of examining a trademark application, the Examining Attorney may identify issues that preclude registration of your mark. They may be substantive (i.e., there is a fundamental flaw with the trademark you wish to register) or procedural (i.e., there was a problem with your application). Any issues the Examining Attorney identifies will be described in an "Office Action," to which you must respond within six (6) months of receipt.
Some problems raised by an Office Action can be corrected with an amendment to the application. Status Code 666 arises when the Examining Attorney makes a request, and your response was not properly filed or did not properly respond to the issue raised by the Examiner. For more information on the specific issues needed to be addressed, see the correspondence you received from the USPTO. For more information on the Trademark Application Process in general, visit:
For more information on possible grounds for rejection, visit: