Are color drawings allowed in PCT applications?

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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. No, color drawings are not allowed in PCT applications. According to MPEP 1825 , “ Color drawings are not acceptable. ” All drawings must be executed in black, with uniformly thick and well-defined lines. This requirement ensures clarity and reproducibility of the drawings across different patent offices and reproduction methods. However, in exceptional cases where it’s impossible to present certain information in a black and white drawing (e.g., crystalline structures), photographs may be allowed. The MPEP states: “ Where, exceptionally, photographs are submitted, they must be on sheets of A4 size, they must be black and white, and they must respect the minimum margins and admit of direct reproduction. Color photographs are not accepted. “ Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Color photographs are not accepted for drawings. MPEP 1825 Photographs Must Be Black and White on A4 Size Sheets MPEP 1825 Required Color Drawings Not Acceptable MPEP 1825 Drawings Must Be Executed With Drafting Instrument MPEP 1825 Required Drawings Must Be Executed Properly MPEP 1825 Required PCT Drawings Must Adhere to Physical Standards MPEP 1825 Required Photographs Not Allowed Except for Crystalline Structures MPEP 1825 Photographs May Be Used for Undrawable Features MPEP 1825 Drawings Must Be Necessary for Understanding Invention MPEP 1825 Required Drawings Must Have Specific Margins MPEP 1825 Required Other Related FAQs 5 FAQs Collapse What are the requirements for color drawings in international patent applications? What are the consequences of submitting informal drawings in an international patent application? How should figures be numbered in PCT application drawings...