CFR›Title 37›Chapter I›Part 1›Subpart D›Subject Group Citation of Prior Art and Written Statements ContainsSections 1.501–1.502CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Sections 1.501 § 1.501 Citation of prior art and written statements in patent files. 1.502 § 1.502 Processing of prior art citations during an <em>ex parte</em> reexamination proceeding. Previous <em>Ex Parte</em> Reexamination Certificate <em>Ex Parte</em> Reexamination Certificate Next Request for <em>Ex Parte</em> Reexamination Request for <em>Ex Parte</em> Reexamination