Patents in China are divided into inventions, utility models and design patents. The protection period of invention patent is 20 years, and that of utility model and design is 10 year. If you don't want to give up your patent right, you must give it to the end of the protection period.
Among the three patents, the annual fees for utility model and design are the same, as follows:
It should be noted that the annual fee is calculated on the date of application, and it is regarded as one year from the application date of the previous year to the application date of the second year.