MPEP § 2232.01 — Determining if a Reexamination Request Was Filed under 35 U.S.C. 302 for a Patent

Ninth Edition, Revision 01.2024 · last revised R-07.2022

TO DETERMINE FROM PATENT CENTER OR PATENT DATA PORTAL IF A REEXAMINATION REQUEST HAS BEEN FILED FOR A GIVEN PATENT NUMBER

Both the Internet (using Patent Center) and the USPTO intranet (using Patent Data Portal (PDP)) can be accessed to determine if a reexamination request has been filed for a particular patent.

Using the USPTO Intranet

- From the USPTO intranet site https://ptoweb.uspto.gov, Office personnel can click on "Business Units" and then “Patent Data Portal”.

- From here, select “patent number” in the drop down menu next to “Search by” and enter the patent number.

- Click the search icon and when the application information appears, click on “Continuity & foreign data” to obtain the reexamination number.

Any reexamination for the patent number will be listed.

There will be about a ten (10) day lag between filing and data entry into the database.

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