How to cancel the registration of patent pledge?

The procedures for cancellation of pledge registration shall meet the following conditions: ① The parties request cancellation of pledge contract registration in advance due to early repayment of creditor's rights or other reasons; ② The patent right is invalid, revoked or lost for other reasons; ③ The pledge contract is invalid because the main contract is invalid; ④ The pledge period has expired; ⑤ Other reasons. In addition, if you submit false contract documents or illegally obtain or forge the registration of the patent pledge contract by other means, the relevant contract registration will be revoked according to law; The patent administration authority where the party concerned is located shall impose a fine of more than 1000 yuan and less than 10000 yuan. Procedures for cancellation of registration of patent pledge: ① The parties concerned shall submit the notice of registration of patent pledge contract, the certificate of completion of contract performance, written agreement and other supporting materials to the Patent Office. (2) After examination and approval by the Patent Office, a Notice of Cancellation of Registration of Patent Pledge Contract shall be issued to the parties concerned. (3) After the expiration of the pledge period 15 days, if the parties fail to take the initiative to cancel the registration, the contract registration will be automatically cancelled. The date of cancellation of registration shall be subject to the validity period. The patent pledge contract shall be invalid from the date of registration and cancellation. (4) After the debt is fulfilled, the pledgee shall return the patent certificate and other documents delivered by the pledger. If the debt has not been fulfilled, the pledge agreement can be discounted, or the pledge can be auctioned or sold according to law.