If the patentee fails to pay the annual fee on time (excluding the annual fee for the year when the patent right is granted) or the amount paid is insufficient, he may make up the payment within six months from the expiration date of the annual fee. If the payment time exceeds the prescribed period but is less than one month, no late payment fee will be paid. If the time for back payment exceeds the prescribed time by one month, the corresponding amount of late payment fee calculated according to the following calculation method shall be paid:
(1) It exceeds the prescribed period by one month (excluding a whole month) to two months ( If the period exceeds the prescribed period by two months to three months (including three whole months), the payment amount shall be 5% of the full annual fee; 10% of the full annual fee;
(3) If the prescribed period exceeds three months to four months (including four full months), the payment amount shall be 15% of the full annual fee;
(4) If it exceeds the prescribed period by four to five months (including five full months), the payment amount shall be 20% of the full annual fee;
(5) If it exceeds the prescribed period by five months For months to six months, the payment amount is 25% of the full annual fee.
When the first payment is insufficient during the six-month overdue period, and the payment is made again, the amount of the late payment fee payable shall be the full percentage corresponding to the month in which the additional payment exceeds the prescribed period. Annual fee. If the termination is due to overdue or insufficient payment of annual fees and/or late fees, during the reinstatement procedure, in addition to the annual fee, a late fee of 25% of the full annual fee must also be paid or made up.