Petitions received by the USPTO are given a document description or document code that routes the paper to the appropriate deciding office. It is important to use available forms or an appropriate header that clearly identifies the type of petition being filed (e.g., Petition under 37 CFR 1.181 to withdraw a holding of abandonment) to help minimize processing delays.
When filing a petition electronically via patents electronic filing systems, the filer is responsible for choosing the appropriate document description. A list of available document descriptions is available online.
The delegation of authority to decide petitions is outlined in MPEP § 1002. The Patents Petitions Timeline also provides information on deciding offices for various petitions at each stage of prosecution. The most common document description for petitions handled by the Office of Petitions is “Petition for review by the Office of Petitions” (PET.OP). However, certain petitions handled by the Office of Petitions have more specific codes, including Patent Prosecution Highway requests (PPH.PET.652), Track 1 requests (TRACK1.REQ), and petitions to make special based on age/health (PET.OP.AGE).
Describing petitions as letters or miscellaneous documents will likely result in processing delays.