MPEP § fp29.101
All discussions between the applicant and the examiner regarding the merits of a pending application will be considered an interview and are to be made of record. See MPEP § 713. The examiner will not discuss the merits of the application with applicant's representative if the representative is not registered to practice before the USPTO. Appointment as applicant’s representative before the International Bureau pursuant to Rule 3 of the Common Regulations under the Hague Agreement does NOT entitle such representative to represent the applicant before the USPTO. Furthermore, an applicant that is a juristic entity must be represented by a patent attorney or agent registered to practice before the USPTO. Additional information regarding interviews is set forth below.
Telephonic or in person interviews
A telephonic or in person interview may only be conducted with an attorney or agent registered to practice before the USPTO ("registered practitioner") or with a pro se applicant (an applicant who is the inventor and who is not represented by a registered practitioner).
The registered practitioner may either be of record or not of record. To become "of record," a power of attorney (POA) in accordance with 37 CFR 1.32 must be filed in the application. Form PTO/AIA/80 "Power of Attorney to Prosecute Applications Before the USPTO," available at www.uspto.gov/ patent/forms/forms-patent-applications-filed-or-after-september-16-2012, may be used for this purpose. See MPEP § 402.02(a) for further information. Interviews may also be conducted with a registered practitioner not of record provided the registered practitioner can show authorization to conduct an interview by completing, signing and filing an "Applicant Initiated Interview Request Form" (PTOL-413A) (available at the USPTO web page indicated above). See MPEP § 405. For acceptable ways to submit forms to the USPTO, see "When Responding to Official USPTO Correspondence" below.
Add this paragraph at the end of the Refusal where a patent attorney or agent registered to practice before the United States Patent and Trademark Office has not been appointed as applicant's representative.