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35 U.S.C. §§ 321-329: Post-grant review

35 U.S.C. 321-329 authorizes post-grant review at the PTAB.

Citation: 35 U.S.C. §§ 321-329

Type: Statute

Jurisdiction: Federal

Issuing body: U.S. Congress

Status: In force

Sections 321 through 329 authorize post-grant review, a Patent Trial and Appeal Board trial on any ground of invalidity, available only within nine months after grant. The petitioner must prove unpatentability by a preponderance of the evidence under section 326(e), and estoppel follows a final written decision under section 325(e).

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