Patent Cooperation Treaty: The Patent Cooperation Treaty is an international patent law treaty, concluded in 1970. It provides a unified procedure for filing patent applications to protect inventions in each of its contracting states. A patent application filed under the PCT is called an international application, or PCT application.
Information on drawing requirements is based substantially on 37 CFR § 1.84. Black and white drawings are normally required. India ink, or its equivalent that secures black solid lines, must be used for drawings. For nonprovisional utility applications, the “sheets” of drawings should be contained in an electronic document in PDF format filed via EFS-Web […]
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Drawings shall be executed in durable, black, sufficiently dense, and dark, uniformly thick, and well-defined, lines and strokes without colorings. Cross-sections shall be indicated by oblique hatching which should not impede the clear reading of the reference signs and leading lines. The scale of the drawings and the distinctness of their graphical execution shall be
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