Required. Annual fees for invention patents: 900 yuan for 1-3 years, 1,200 yuan for 4-6 years, 2,000 yuan for 7-9 years, 4,000 yuan for 10-12 years, 6,000 yuan for 13-15 years, 8,000 yuan for 16-20 years.
Under normal circumstances, it takes 2 to 3 years for an invention patent to be authorized. Annual fees for Chinese invention patents begin in the year of authorization and are paid year by year. Generally, no annual fee is required for the first year. However, if the patent application is accelerated through pre-examination, priority examination, etc., and is authorized in the first year, then the annual fee for the first year will need to be paid.