Can a patent owner designate separate addresses for different reexamination proceedings?

This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.

Yes, a patent owner can designate separate addresses for different reexamination proceedings on the same patent. MPEP 2222 explicitly states:

“A patent owner may designate a separate correspondence address for each reexamination proceeding for which a request is filed.”

This allows patent owners to manage multiple reexamination proceedings more efficiently, especially if different legal representatives are handling each case. To designate separate addresses:

• File a clear request for each specific reexamination proceeding
• Provide the desired correspondence address for that particular proceeding
• Ensure the request is properly signed and submitted to the USPTO