U.S. Patent Act
..Part I. Patent and Trademark Office
....Chapt. 3. Practice Before Patent and Trademark Office
The Commissioner may, after notice and opportunity for a hearing suspend or exclude, either generally or in any particular case, from further practice before the Patent and Trademark Office, any person, agent, or attorney shown to be incompetent or disreputable, or guilty of gross misconduct, or who does not comply with the regulations established under section 31 of this title [35 USCS Sect. 31], or who shall, by word, circular, letter, or advertising, with intent to defraud in any manner, deceive, mislead, or threaten any applicant or prospective applicant, or other person having immediate or prospective business before the Office. The reasons for any such suspension or exclusion shall be duly recorded. The United States District Court for the District of Columbia, under such conditions and upon such proceedings as it by its rules determines, may review the action of the Commissioner upon the petition of the person so refused recognition or so suspended or excluded.