---
kind: "unit"
title: "37"
title_heading: "Patents, Trademarks, and Copyrights"
key: "chI/subchA/part1/subpartA"
level: "subpart"
label: "Subpart A"
heading: "General Provisions"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/37/chI-subchA-part1-subpartA"
sections_count: 29
---

# Subpart A — General Provisions

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

- [§1.1. Addresses for non-trademark correspondence with the United States Patent and Trademark Office.](/cfr/37/1.1.md)
- [§1.2. Business to be transacted in writing.](/cfr/37/1.2.md)
- [§1.3. Business to be conducted with decorum and courtesy.](/cfr/37/1.3.md)
- [§1.4. Nature of correspondence and signature requirements.](/cfr/37/1.4.md)
- [§1.5. Identification of patent, patent application, or patent-related proceeding.](/cfr/37/1.5.md)
- [§1.6. Receipt of correspondence.](/cfr/37/1.6.md)
- [§1.7. Times for taking action; Expiration on Saturday, Sunday or Federal holiday.](/cfr/37/1.7.md)
- [§1.8. Certificate of mailing or transmission.](/cfr/37/1.8.md)
- [§1.9. Definitions.](/cfr/37/1.9.md)
- [§1.10. Filing of correspondence by Priority Mail Express®.](/cfr/37/1.10.md)
- [§1.11. Files open to the public.](/cfr/37/1.11.md)
- [§1.12. Assignment records open to public inspection.](/cfr/37/1.12.md)
- [§1.13. Copies and certified copies.](/cfr/37/1.13.md)
- [§1.14. Patent applications preserved in confidence.](/cfr/37/1.14.md)
- [§1.15. Reserved](/cfr/37/1.15.md)
- [§1.16. National application filing, search, and examination fees.](/cfr/37/1.16.md)
- [§1.17. Patent application and reexamination processing fees.](/cfr/37/1.17.md)
- [§1.18. Patent post allowance (including issue) fees.](/cfr/37/1.18.md)
- [§1.19. Document supply fees.](/cfr/37/1.19.md)
- [§1.20. Post-issuance fees.](/cfr/37/1.20.md)
- [§1.21. Miscellaneous fees and charges.](/cfr/37/1.21.md)
- [§1.22. Fees payable in advance.](/cfr/37/1.22.md)
- [§1.23. Methods of payment.](/cfr/37/1.23.md)
- [§1.24. Reserved](/cfr/37/1.24.md)
- [§1.25. Deposit accounts.](/cfr/37/1.25.md)
- [§1.26. Refunds.](/cfr/37/1.26.md)
- [§1.27. Definition of small entities and establishing status as a small entity to permit payment of small entity fees; when a determination of entitlement to small entity status and notification of loss of entitlement to small entity status are required; fraud on the Office.](/cfr/37/1.27.md)
- [§1.28. Refunds when small entity status is later established; how errors in small entity status are excused.](/cfr/37/1.28.md)
- [§1.29. Micro entity status.](/cfr/37/1.29.md)