How does inter partes reexamination differ from ex parte reexamination?

Inter partes reexamination differs from ex parte reexamination in several procedural aspects, but not in the substance considered. The MPEP states: “Inter partes reexamination differs from ex parte reexamination in matters of procedure, such as when the third party requester can participate, the types of Office actions and the timing of issuance of the Office…

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