Manual of Patent Examining Procedure - MPEP

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2600 Optional Inter Partes Reexamination

2630 Constructive Notice to Patent Owner

In some instances, it may not be possible to deliver mail to the patent owner because no current address is available. If all efforts to correspond with the patent owner fail, the reexamination proceeding will proceed without the patent owner. The publication in the Official Gazette of the notice of the filing of the inter partes reexamination request will serve as constructive notice to the patent owner in such an instance.

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