Legal analysis: Under normal circumstances, the copyright is not limited by time, the patent right is ten years, and the registered trademark is valid for ten years. The term of patent right for invention is twenty years, and the term of patent right for utility model and patent right for design is ten years.
Legal basis: Article 42 of the Patent Law of People's Republic of China (PRC) has a term of 20 years, and the term of utility model patent and design patent is 10 years, counting from the date of filing.