Title 35 › Part III— PATENTS AND PROTECTION OF PATENT RIGHTS › Chapter 32— POST-GRANT REVIEW › § 326
The Director must write rules that explain how post-grant reviews work. The rules will make case files public unless someone files a petition and asks for it to be sealed. They will say how to show enough reason to start a review, how to add extra information after a petition is filed, how the review fits with other patent cases, and how discovery works (limited to evidence tied to each party’s claims). The rules must allow protective orders for private information, penalties for abuse or delay, a chance for the patent owner to answer with facts and expert statements, and at least one chance for the petitioner to file written comments. Either side can get an oral hearing. The final decision must be issued within 1 year after the review starts, but the Director can extend that by up to 6 months for good cause and may change timing if cases are joined. The Patent Trial and Appeal Board will handle each review. During a review, the patent owner may file one motion to amend the patent to cancel claims or to propose a reasonable number of replacement claims. More amendment motions can be allowed if both sides agree to help settlement or if the owner shows good cause. Any amendment cannot broaden claims or add new material. The petitioner must prove unpatentability by a preponderance of the evidence.
Full Legal Text
Patents — Source: USLM XML via OLRC
Legislative History
Reference
Citation
35 U.S.C. § 326
Title 35 — Patents
Last Updated
Apr 5, 2026
Release point: 119-73not60