What are the formatting requirements for a substitute specification?

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.

A substitute specification must be submitted with specific formatting requirements as outlined in 37 CFR 1.125(c):

• A clean version (without markings) must be provided.
• A marked-up copy showing all changes relative to the prior version must be submitted.
• Added text must be shown by underlining.
• Deleted text must be shown by strike-through or double brackets (for five or fewer consecutive characters).

The MPEP further states: “The paragraphs of any substitute specification, other than the claims, should be individually numbered in Arabic numerals (for example [0001]) so that any amendment to the specification may be made by replacement paragraph in accordance with 37 CFR 1.121(b)(1).”