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)
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/patents/process/search/authority/reexam/index.jsp.
Click here to download the zipped file (last updated April 29, 2023).
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