# Rules of Practice To Allocate the Burden of Persuasion on Motions To Amend in Trial Proceedings Before the Patent Trial and Appeal Board
> **US Patent and Trademark Office** · Rule · Published 2021-01-13 · 86 FR 2542
## Document
- **Document number:** C1-2020-28159
- **Category:** other
- **Sub-agency:** US Patent and Trademark Office
- **Federal Register citation:** 86 FR 2542
- **CFR reference:** 37 CFR 42
- **Publication date:** 2021-01-13
- **Commerce docket:** Docket No. PTO-P-2019-0011
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/01/13/C1-2020-28159/rules-of-practice-to-allocate-the-burden-of-persuasion-on-motions-to-amend-in-trial-proceedings)
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