Can third-party requesters participate in appeals during ex parte reexamination?

No, third-party requesters cannot participate in appeals during ex parte reexamination. The MPEP 2273 explicitly states: “A third party requester may not appeal, and may not participate in the patent owner’s appeal.” This limitation is a key feature of ex parte reexamination proceedings, distinguishing them from inter partes reviews where third parties have more extensive…

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Can a patentability decision favoring the patentee be reviewed in ex parte reexamination?

No, a patentability decision favoring the patentee cannot be reviewed in ex parte reexamination. The MPEP 2273 clearly states: “The reexamination statute does not provide for review of a patentability decision favoring the patentee.” This principle is supported by case law, specifically “Greenwood v. Seiko Instruments, 8 USPQ2d 1455 (D.D.C. 1988).” This limitation is an…

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Can new grounds of rejection be introduced in an examiner’s answer during ex parte reexamination?

Yes, new grounds of rejection can be introduced in an examiner’s answer during ex parte reexamination. According to MPEP 2273: “The examiner may, however, include in the examiner’s answer a new ground of rejection, in which case appellant would have the right to amend the claims, or take other appropriate action under 37 CFR 41.39(a)(2).”…

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