-Pay the annual patent fee: If your patent expires due to failure to pay the annual patent fee in time, you can pay the annual patent fee to restore the validity of the patent. Specific payment methods and fees can be found on the website of the Patent Office.
-Apply for the right of restoration: If you miss the time to pay the annual fee, but your patent right has not terminated, you can apply for the right of restoration. In this case, you need to pay the annual fee, 25% late fee and 1000 yuan patent restoration fee within two months after receiving the notice.