Title 35 › PART III — PATENTS AND PROTECTION OF PATENT RIGHTS › CHAPTER 31 — INTER PARTES REVIEW › § 316
The Director of the Patent Office must write rules for how inter partes reviews work. The rules must make case files public unless someone asks to seal a document and a judge has not yet decided. The rules must say how to start a review, how to send extra information after a petition, and how these reviews fit with other patent cases. Discovery is limited mostly to taking testimony from people who filed affidavits or declarations and to what is needed for fairness. The rules must allow protective orders for secret information, punish misuse of the process or discovery, let the patent owner answer with evidence and expert statements, let either side ask for an oral hearing, and give the petitioner at least one chance to file written comments. The Director must set a deadline so the final decision comes within 1 year after a review starts, but may extend that by up to 6 months for good cause and may set times for joinder requests. The Patent Trial and Appeal Board must run each review. During a review, the patent owner may file one motion to amend: cancel challenged claims or offer a reasonable number of replacement claims. More amendment motions can be allowed if both sides agree to help settle or if the rules allow it. Any amendment cannot broaden claims or add new subject matter. The petitioner must prove unpatentability by a preponderance of the evidence. The Director must consider how the rules affect the economy, the patent system’s fairness, Office efficiency, and the ability to finish reviews on time.
Full Legal Text
Patents, Source: USLM XML via OLRC
Legislative History
Reference
Citation
35 U.S.C. § 316
Title 35, Patents
Last Updated
Sep 22, 2026
Release point: 119-110