If an inter partes review petition is filed under section 311, the patent owner shall have the right to file a preliminary response to the petition, within a time period set by the Director, that sets forth reasons why no inter partes review should be instituted based upon the failure of the petition to meet any requirement of this chapter. 35 U.S.C. § 313 Added Pub. L. 106-113, div. B, §1000(a)(9) [title IV, §4604(a)], Nov. 29, 1999, 113 Stat. 1536, 1501A-568; amended Pub. L. 107-273, div. C, title
(a) INFRINGER'S CIVIL ACTION.- (1) POST-GRANT REVIEW BARRED BY CIVIL ACTION.-A post-grant review may not be instituted under this chapter if, before the date on which the petition for such a review is filed, the petitioner or real party in interest filed a civil action challenging the validity of a claim of the patent. (2) STAY OF CIVIL ACTION.-If the petitioner or real party in interest files a civil action challenging the validity of a claim of the patent on or after the date on which the petitioner