Can an examiner reject a patent application after it has been allowed?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-27 10 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. Yes, an examiner can reject a patent application after it has been allowed. The MPEP 1308.01 states: “The examiner may withdraw the application from issue because of: An amendment under 37 CFR 1.312; A printer rush; A mistake on the part of the Office; A violation of 37 CFR 1.56 or illegality in the application; Unpatentability of one or more claims; or For interference.” This demonstrates that even after allowance, various circumstances may lead to a rejection or withdrawal from issue. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Director May Withdraw Application from Issue MPEP 1308 Permitted Notice of Withdrawal From Issue When Fee Paid MPEP 1308 Required Requirement for Withdrawal from Issue MPEP 1308 Petition to Withdraw Application from Issue Must Be Directed to TC Director MPEP 1308 Recommended USPTO May Withdraw Application After Fee Payment Under Certain Conditions MPEP 1308 Permitted Petition for Withdrawal from Issue Upon Office Initiative or Applicant Request MPEP 1308 Permitted Petition for Withdrawing Application from Issue MPEP 1308 Required Petition for Withdrawal from Issue Requires Specific Defect MPEP 1308 Recommended Petition for Withdrawing Application from Issue Must Be Mailed to Specific Address MPEP 1308 Prohibited Petition to Withdraw Application from Issue Must Be Timely Filed MPEP 1308 Permitted Other Related FAQs 5 FAQs Collapse Can a previously paid issue fee be applied to a new Notice of Allowance? What actions does an examiner take after an application is withdrawn from issue? What happens if an examiner discovers prior art after a notice of allowance? How does the timing of an IDS submission affect the examination process after...