What type of ink is required for patent application documents?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-10 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 714.07 , patent application documents must be submitted using permanent dark ink or its equivalent . This requirement is specified in 37 CFR 1.52(a) . The MPEP states: 37 CFR 1.52(a) requires ‘permanent dark ink or its equivalent’ to be used on papers which will become part of the record. This ensures that the documents will be legible and durable for long-term record-keeping purposes. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Permanent Dark Ink Required for Record Papers MPEP 714.07 Response Required for OPAP Notice MPEP 714 Markings Required for Replacement Paragraphs MPEP 714 Square Brackets Required for Deletions MPEP 714 New Abstract Required for Substantial Rewriting MPEP 714 Permitted Additional New Drawings Must Be Submitted on a New Sheet MPEP 714 Required Annotated Sheet Required for Amended Drawings MPEP 714 Permitted Annotated Sheet Required for Amended Drawings MPEP 714 Required Replacement Sheets Required for Drawing Changes MPEP 714 Drawings Must Be Submitted to Office of Data Management After Allowance MPEP 714 Recommended Other Related FAQs 5 FAQs Collapse Has the importance of paper type for patent applications changed with digital record-keeping? How does the USPTO currently maintain patent application documents? Can &#8216;Easily Erasable&#8217; paper be used for patent applications? No more FAQs What happens if an amendment under 37 CFR 1.312 adds claims exceeding the previously paid number?