What are the guidelines for solid lines in international design application reproductions?

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.

Solid lines play a crucial role in international design application reproductions. According to MPEP 2920.04(b):

“Solid lines must be used to show the claimed subject matter. Solid lines may not be used to show hidden planes and surfaces which cannot be seen through opaque materials.”

Key guidelines for using solid lines:

• Use solid lines to depict the claimed subject matter of the design
• Do not use solid lines for hidden planes or surfaces
• Avoid using solid lines for surfaces obscured by opaque materials
• Ensure consistency in line weight and quality throughout the drawings

Proper use of solid lines is essential for clearly defining the scope of the claimed design and distinguishing it from unclaimed or environmental elements.