Legal analysis: Appearance patents require annual fees. If the patentee fails to pay the annual fee on time for the year after the patent right is granted, or the amount paid is insufficient, the Patent Office shall notify the patentee to pay the annual fee within six months from the expiration date of the annual fee, and at the same time, the patentee must pay an amount of A late payment fee of 25% of the annual fee will be imposed; if the payment is not made at the end of the period, the patent rights will be terminated from the expiration date of the annual fee due. The annual fee can be paid directly to the Patent Office or remitted through the post office. All fees paid to the Patent Office should indicate the correct application number, fee name abbreviation and itemized amount. If the fee is not specified, it will be deemed that the payment procedures have not been completed.
Legal basis: Article 43 of the "Patent Law of the People's Republic of China" The patentee shall pay annual fees starting from the year when the patent right is granted.