Can you petition a partial grant of a reexamination request?

Yes, you can petition a partial grant of a reexamination request. MPEP 2248 explains:

“If an order granting reexamination includes a determination that the third party requester has not raised a substantial new question of patentability (SNQ) for one claim, but has raised a SNQ for at least one other claim, then third party requester may (within one month of the mailing date of the order) file a petition under 37 CFR 1.515(c) for reconsideration of the determination as to the claim for which no SNQ has been found to be raised.”

Similarly, a petition can be filed if the determination grants the request for some reasons (SNQs) but not for others. This allows requesters to challenge partial denials within a granted reexamination order.

To learn more:

Topics: MPEP 2200 - Citation Of Prior Art And Ex Parte Reexamination Of Patents, MPEP 2248 - Petition From Denial Of Request Filed Under 35 U.S.C. 302, Patent Law, Patent Procedure
Tags: ex parte reexamination, partial grant, Petition Process, Substantial New Question