---
kind: "unit"
title: "37"
title_heading: "Patents, Trademarks, and Copyrights"
key: "chI/subchA/part1/subpartE"
level: "subpart"
label: "Subpart E"
heading: "Supplemental Examination of Patents"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/37/chI-subchA-part1-subpartE"
sections_count: 6
---

# Subpart E — Supplemental Examination of Patents

Title 37 C.F.R. — Patents, Trademarks, and Copyrights › Chapter I — United States Patent and Trademark Office, Department of Commerce › Subchapter A — General › Part 1 — Rules of Practice in Patent Cases

## Sections

- [§1.601. Filing of papers in supplemental examination.](/cfr/37/1.601.md)
- [§1.605. Items of information.](/cfr/37/1.605.md)
- [§1.610. Content of request for supplemental examination.](/cfr/37/1.610.md)
- [§1.615. Format of papers filed in a supplemental examination proceeding.](/cfr/37/1.615.md)
- [§1.620. Conduct of supplemental examination proceeding.](/cfr/37/1.620.md)
- [§1.625. Conclusion of supplemental examination; publication of supplemental examination certificate; procedure after conclusion.](/cfr/37/1.625.md)