View all text of Chapter 43 [§ 2501 - § 2507]

§ 2506.
Limitations of suits to annul patents

Suits by the United States to vacate and annul any patent shall only be brought within six years after the date of the issuance of such patents.

(Mar. 3, 1891, ch. 559, 26 Stat. 1093; Mar. 3, 1891, ch. 561, § 8, 26 Stat. 1099.)