Is there a time limit for patent application?

Legal analysis: limited. The patent licensing contract is only valid during the patent right. According to the provisions of the Patent Law, the term of invention patent right is 20 years, and the term of patent transfer for limited-time utility model patent right and design patent right is 10 year, counting from the date of application.

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. The term of invention patent right is 20 years, and the term of utility model patent right and design patent right is 10 years, counting from the date of application. After the expiration of the patent right, the patent right shall be terminated.