37 CFR § 1.133 - Interviews.
(1) Interviews with examiners concerning applications and other matters pending before the Office must be conducted on Office premises and within Office hours, as the respective examiners may designate. Interviews will not be permitted at any other time or place without the authority of the Director.
(2) An interview for the discussion of the patentability of a pending application will not occur before the first Office action, unless the application is a continuing or substitute application or the examiner determines that such an interview would advance prosecution of the application.
(3) The examiner may require that an interview be scheduled in advance.
(b) In every instance where reconsideration is requested in view of an interview with an examiner, a complete written statement of the reasons presented at the interview as warranting favorable action must be filed by the applicant. An interview does not remove the necessity for reply to Office actions as specified in §§ 1.111 and 1.135.