When will the patent payment invoice be sent to the mailbox?

1 week. The patent payment invoice will be sent to the mailbox, and the receipt code will be received in the mailbox one week after payment. If you haven't received it, you can call the China National Intellectual Property Administration Customer Service Center to select the receipt and information supplement group for inquiry. Patent fees include application fees, examination fees for the substance of the invention, reexamination fees, and change fees for specification items. Applicants who want to restore their rights or extend the patent term need to pay the corresponding fees.