PCT AI Section 204 — Headings of the Parts of the Description

Ninth Edition, Revision 01.2024

• (a) The headings of the parts of the description shall preferably be as follows:
  • (i) for matter referred to in Rule 5.1(a)(i) , “Technical Field”;
  • (ii) for matter referred to in Rule 5.1(a)(ii) , “Background Art”;
  • (iii) for matter referred to in Rule 5.1(a)(iii) , “Disclosure of Invention” or “Summary of Invention”;
  • (iv) for matter referred to in Rule 5.1(a)(iv) , “Brief Description of Drawings”;
  • (v) for matter referred to in Rule 5.1(a)(v) , “Best Mode for Carrying out the Invention,” or, where appropriate, “Mode(s) for Carrying out the Invention” or “Description of Embodiments”;
  • (vi) for matter referred to in Rule 5.1(a)(vi) , “Industrial Applicability”.
  • (vii) [Deleted]
  • (viii) [Deleted]
• (b) The heading “Title of Invention” shall preferably precede the title of the invention.