What should a third-party requester do if service of the reexamination request on the patent owner is not possible?

If a third-party requester is unable to serve the reexamination request on the patent owner despite reasonable efforts, they must take specific steps. According to MPEP 2220: “If service was not possible after a reasonable effort to do so, a duplicate copy of the request papers must be supplied to the Office together with a…

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