Legal analysis: utility model patents have to pay an annual fee every year. The patentee shall pay the annual fee and overdue fine in full according to the limit. The specific annual fee for the utility model patent is 1 to 3 years in 600 yuan, 4-5 years in 900 yuan, 6-8 years 1.200 yuan, and 9-10 years in 2000 yuan. The annual fee for the year of patent grant shall be paid within the time limit specified in the patent grant notice issued by the Patent Office.
Legal basis: Article 43 of the Patent Law of People's Republic of China (PRC) stipulates that the patentee shall pay the annual fee from the year when the patent right is granted.