What information is included in the header of an ex parte reexamination certificate?

The header of an ex parte reexamination certificate includes several key pieces of information:

• The patent number of the original patent
• The reexamination request number
• The effective date of the certificate
• The patent owner’s name
• The text “Ex Parte Reexamination Certificate”
• The number of the certificate (e.g., “1st”)

As stated in MPEP 2290: “The certificate is titled “Ex Parte Reexamination Certificate.” The title is followed by the patent number of the original patent and the effective date of the certificate.”

To learn more:

• ex parte reexamination
• certificate header
• patent information