Publication for Opposition
If the examining attorney raises no objections to registration, or if the applicant overcomes all objections, the examining attorney will approve the mark for publication in the Official Gazette.
The USPTO will send a Notice of Publication to the applicant stating the date of publication. Any party who believes it may be damaged by registration of the mark has thirty (30) days from the publication date to file either an opposition to registration or a request to extend the time to oppose.
If no opposition is filed or if the opposition is unsuccessful, the application enters the next stage of the registration process. A Certificate of Registration will issue for applications based on use, or on a foreign registration under S44, or a Notice of Allowance will issue for intent-to-use applications.
Source: U.S. Patent and Trademark Office.