Notice of Abandonment

A written notification from the USPTO that an application has been declared abandoned or, in other words, is no longer pending. If the application was abandoned unintentionally or due to Office error, the applicant has a deadline of two months from the issue date of the notice of abandonment to file either (1) a petition to revive the application or (2) a request to reinstate the application.

Source: U.S. Patent and Trademark Office.