These historical statistics are data for requests for reexamination filed since 7/1/1981 (for ex parte) or since 11/29/1999 (for inter partes). They are updated quarterly.
- ex parte reexamination historical statistics (Updated 12/2023)
- inter partes reexamination historical statistics (Updated 12/2017)
These operational statistics show quarterly volume and timing in processing requests for reexamination. They are updated quarterly.
- Reexamination operational statistics (Updated 6/2024)