What types of mistakes can be corrected with 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. According to MPEP 1481 , there are three types of mistakes that can be corrected with a Certificate of Correction: Clerical mistakes Typographical mistakes Mistakes of minor character The MPEP states: “Two separate statutory requirements must be met before a Certificate of Correction for an applicant’s mistake may issue. The first statutory requirement concerns the nature, i.e., type, of the mistake for which a correction is sought. The mistake must be: (1) of a clerical nature, (2) of a typographical nature, or (3) a mistake of minor character.” It’s important to note that these mistakes must not involve changes that would constitute new matter or require reexamination. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Correction Must Not Add New Matter or Require Reexamination MPEP 1481 Prohibited Correction Must Not Add New Matter or Require Reexamination MPEP 1481 Certificate of Correction Mistakes Must Be Minor MPEP 1481 Required Requirements for Certificate of Correction of Applicant’s Mistake MPEP 1481 Required Correction for Clerical Mistakes Allowed MPEP 1481 Required Mistake of Minor Character Excludes Claim Broadening MPEP 1481 Correction for Applicant’s Mistake MPEP 1481 Criteria for Certificate of Correction Under 35 U.S.C. 255 MPEP 1481 Requirement for Type of Applicant’s Mistake MPEP 1481 Patentee Can Request Certificate of Correction MPEP 1481 Permitted 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 Can an inventor&#8217;s oath or declaration be corrected or withdrawn after submission?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...