Legal analysis: duration of patent protection: the duration of invention patent right is 20 years, utility model patent right is 10 year, and design patent right is 15 year. The term of patent protection refers to the term of patent protection after the patent is granted the right.
Legal basis: According to Article 42 of the Patent Law of People's Republic of China (PRC), the term of invention patent is 20 years, the term of utility model patent is 10 year, and the term of design patent is 15 year, all of which are counted from the date of application.