Legal analysis: the validity period of utility model patent is 10 year. During this period, the patent fee should be paid every year. The annual patent fees for utility model patents and design patents are: 1-3 years 600 yuan/year, 4-5 years 900 yuan/year, 6-8 years kloc-0/.200 yuan/year and 9- 10 years 2000 yuan/year respectively. Failure to pay the annual fee in full will lead to the early termination of the patent right. Of course, if the patentee wishes to voluntarily give up the patent right, he can also voluntarily declare to give up the patent right and terminate the patent right in advance by not paying the annual fee.
Legal basis: Article 42 of the Patent Law of People's Republic of China (PRC)? The term of the invention patent right is 20 years, and the term of the utility model patent right and the design patent right is 10 years, both counting from the date of application.