What is a “reexamination of a reexamination”?

A “reexamination of a reexamination” refers to a situation where a new reexamination request is filed on a patent for which a reexamination certificate has already been issued, or when a reexamination certificate is issued on a prior reexamination while a new reexamination is pending. As stated in MPEP § 2695:

“This reexamination request is generally referred to as a ‘reexamination of a reexamination.'”

This process allows for multiple rounds of reexamination on the same patent, ensuring continued scrutiny of patent validity.

To learn more:

• reexamination
• patent validity
• patent certificate
• multiple reexaminations