---
kind: "unit"
title: "35"
title_heading: "Patents"
key: "ptI/ch2"
level: "chapter"
label: "Chapter 2"
heading: "Proceedings in the Patent and Trademark Office"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/35/ptI-ch2"
sections_count: 8
---

# Chapter 2 — Proceedings in the Patent and Trademark Office

Title 35 — Patents › Part I — United States Patent and Trademark Office

## Sections

- [§21. Filing date and day for taking action](/usc/35/21.md)
- [§22. Printing of papers filed](/usc/35/22.md)
- [§23. Testimony in Patent and Trademark Office cases](/usc/35/23.md)
- [§24. Subpoenas, witnesses](/usc/35/24.md)
- [§25. Declaration in lieu of oath](/usc/35/25.md)
- [§26. Effect of defective execution](/usc/35/26.md)
- [§27. Revival of applications; reinstatement of reexamination proceedings](/usc/35/27.md)
- [§28. Award of certificates to accelerate certain matters at the Patent and Trademark Office](/usc/35/28.md)