Chapter 1900 — ProtestNinth Edition, Revision 01.2024Contents1901 Protest Under 37 CFR 1.2911901.01 Who Can Protest1901.02 Information Which Can Be Relied on in Protest1901.03 How Protest Is Submitted1901.04 When Can the Protest Be Submitted1901.05 Acknowledgment of Protest1901.06 Office Treatment of Protest1901.07 Protestor Participation1906 Supervisory Review of an Examiner’s Decision Adverse to Protestor1907 Unauthorized Participation by Protestor1920 Citation of Prior Art Under 37 CFR 1.501(a)