ex parte reexamination

-- see reexamination proceeding

If the request for ex parte reexamination is filed by a third party and not the patent owner, the third party may not participate in the ex parte proceedings beyond the filing of a reply to the patent owner's statement under 37 CFR § 1.530, if the patent owner files a statement. No other reply or submission by a third party will be considered in ex parte reexamination.

-- see MPEP 2200, 37 CFR §§ 1.501-1.570 and inter partes reexamination for more