What is the difference between obvious and non-obvious mistakes in international patent applications?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-27 10 Rules 4 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. The MPEP 1876 distinguishes between obvious and non-obvious mistakes in international patent applications: Obvious mistakes are addressed using Form PCT/IPEA/411. Non-obvious mistakes are handled differently: “Mistakes that are not obvious may be called to applicant’s attention in Box VII of PCT/IPEA/408.” This distinction is important because it affects how examiners communicate with applicants about different types of errors. Obvious mistakes are those that are clearly apparent and can be rectified easily, while non-obvious mistakes may require more explanation or discussion. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Non-Obvious Mistakes Noted in Box VII of PCT/IPEA/408 MPEP 1876 Permitted Mistakes Noted and Called to Applicant’s Attention by Examiner MPEP 1876 Permitted Rectification of Obvious Mistakes Must Be Forwarded to International Bureau MPEP 1876 Required Examiner Can Invite Applicant to Correct Obvious Errors Using Form PCT/IPEA/411 MPEP 1876 Permitted International Preliminary Examining Authority Must Indelibly Mark Rectified Sheets MPEP 1876 Required Replacement Sheets and Letters Required for Obvious Mistakes MPEP 1876 Rectified Sheet Not Considered for Report MPEP 1876 Required International Bureau Must Notify Elected Offices of Rectifications MPEP 1876 Examiners Must Sign PCT/IPEA Forms MPEP 1876 Required Notification of Defects in International Application Required MPEP 1860 Other Related FAQs 4 FAQs Collapse What is the examiner&#8217;s role in identifying mistakes in international patent applications? What is the purpose of Form PCT/IPEA/408 in international patent applications? How are obvious mistakes in international patent applicati...