What happens to the patent file after a Certificate of Extension is issued?

After a Certificate of Extension is issued, several changes occur to the patent file:

• The certificate is added to the official patent file.
• Original papers from the extension application are transferred to the official patent file.
• A copy of the certificate is added to the patent electronic database.
• The patent is added to the list of extended patents on the USPTO website.

MPEP 2759 states: “All original papers from the application for patent term extension in the official file are transferred to the official patent file of the subject patent and become a part of the permanent record.” This ensures that all relevant information is consolidated in the official patent record.

To learn more:

• Patent File
• Certificate of Extension
• USPTO Records
• Patent Law