What are the consequences if a third party requester fails to file a timely appeal in inter partes reexamination?

If a third party requester fails to file a timely appeal or if their appeal is dismissed in inter partes reexamination, they lose certain rights in the appeal process. However, they may retain some limited participation options depending on the circumstances. According to MPEP 2666.20: “Where the third party requester fails to make a timely…

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