U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 37Chapter IPart 1Subpart D - Subpart D—Ex Parte Reexamination of Patents

CITATION OF PRIOR ART AND WRITTEN STATEMENTS
§ 1.501 - Citation of prior art and written statements in patent files.
§ 1.502 - Processing of prior art citations during an ex parte reexamination proceeding.

REQUEST FOR EX PARTE REEXAMINATION
§ 1.510 - Request for ex parte reexamination.
§ 1.515 - Determination of the request for ex parte reexamination.
§ 1.520 - Ex parte reexamination at the initiative of the Director.

§ 1.525 - Order for ex parte reexamination.
§ 1.530 - Statement by patent owner in ex parte reexamination; amendment by patent owner in ex parte or inter partes reexamination; inventorship change in ex parte or inter partes reexamination.
§ 1.535 - Reply by third party requester in ex parte reexamination.
§ 1.540 - Consideration of responses in ex parte reexamination.
§ 1.550 - Conduct of ex parte reexamination proceedings.
§ 1.552 - Scope of reexamination in ex parte reexamination proceedings.
§ 1.555 - Information material to patentability in ex parte reexamination and inter partes reexamination proceedings.
§ 1.560 - Interviews in ex parte reexamination proceedings.
§ 1.565 - Concurrent office proceedings which include an ex parte reexamination proceeding.

§ 1.570 - Issuance and publication of ex parte
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