What types of mistakes can be corrected through a Certificate of Correction?

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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. A Certificate of Correction can be used to correct various types of mistakes in a patent, including: Typographical errors Clerical errors Mistakes of a minor character According to MPEP 1481 , “A mistake in a patent may be corrected by certificate of correction only if the mistake is of a clerical or typographical nature, or of minor character, and was not the fault of the Office.” It’s important to note that substantial changes or corrections that could be considered new matter are not permitted through this process. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Certificate of Correction Mistakes Must Be Minor MPEP 1481 Required Requirements for Certificate of Correction of Applicant’s Mistake MPEP 1481 Required Patentee Can Request Certificate of Correction MPEP 1481 Permitted Criteria for Certificate of Correction Under 35 U.S.C. 255 MPEP 1481 Mistake of Minor Character Excludes Claim Broadening MPEP 1481 Mistake Affecting Claim Scope Must Be Corrected by Reissue MPEP 1481 Required Correction Must Not Add New Matter or Require Reexamination MPEP 1481 Prohibited Correction Must Not Add New Matter or Require Reexamination MPEP 1481 Mistakes Correctable via Reissue Application MPEP 1481 Permitted Correction for Applicant’s Mistake MPEP 1481 Other Related FAQs 5 FAQs Collapse What happens if a new inventor is identified in a CPA without filing a proper request? Can an inventor&#8217;s oath or declaration be corrected or withdrawn after submission? What should I do if an inventor&#8217;s name has changed after filing a patent application? Can a Certificate of Correction be used to add a priority claim that was omitted from the original patent application? How do...