37 CFR 42.107 : Patents, Trademarks, And Copyrights (§ 1.1 To Chapter V) — (§ 1.1 To Chapter V) — United States Patent And Trademark Office, Department Of Commerce (§ 1.1 To Parts 151-199) — General (§ 1.1 To § 90.3) — Trial Practice Before The Patent Trial And Appeal Board (§ 42.1 To § 42.412) — Inter Partes Review (§ 42.100 To § 42.123) — General (§ 42.100 To § 42.107) — Preliminary response to petition

(a) The patent owner may file a preliminary response to the petition. The response is limited to setting forth the reasons why no inter partes review should be instituted under 35 U.S.C. 314. The response can include evidence except as provided in paragraph (c) of this section. The preliminary response is subject to the page limits under § 42.24.

(b) Due date. The preliminary response must be filed no later than three months after the date of a notice indicating that the request to institute an inter partes review has been granted a filing date. A patent owner may expedite the proceeding by filing an election to waive the patent owner preliminary response.

(c) No new testimonial evidence. The preliminary response shall not present new testimony evidence beyond that already of record, except as authorized by the Board.

(d) No amendment. The preliminary response shall not include any amendment.

(e) Disclaim Patent Claims. The patent owner may file a statutory disclaimer under 35 U.S.C. 253(a) in compliance with § 1.321(a) of this chapter, disclaiming one or more claims in the patent. No inter partes review will be instituted based on disclaimed claims.