Authority Listing

The Reexamination Certificates File contains a listing of all Reexamination Certificates for US patent documents and lists the following fields:

Document Number
Publication Date
Kind of Document Code (B1, B2, C1, C2, F1 and F2)

The Reexamination Certificate File is normally updated on a monthly basis.

In addition, layout information for the Reexamination Certificates File is provided. Additional information regarding Reexamination Certificates can be found on the list at the following location http://www.uspto.gov/web/patents/authority/reexamcert/reexamcertification.html.

Click here to download the zipped file (last updated December 26, 2008). Some contents linked to on this page require a plug-in for ZIP File.

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