You can log in to the official website of the Trademark Office and enter the trademark registration number or trademark applicant information. However, there will be delays in trademark office inquiries. If you are in a hurry, it is recommended to ask a trademark agent for a rejection notice. You can consult more professional trademark agents about the rejection review situation. The reason and content of the rejection cannot be found, but an agent with certain experience can conduct a search based on the trademark name (pattern) you provided.