Is there a time limit for patents? How long is the patent valid?

Is there a time limit for patents? How long is the patent valid? I believe this is a matter of great concern to many applicants. First of all, I want to tell you that the property right of a patent is not permanent, nor is it a patent you invented. This patent is yours for life, and the patent has a time limit. The following eight quit intellectual property rights will take you to see this problem. Is there a time limit for patents? How long is the patent valid? The validity period of a patent is also the validity period of a patent right. According to the provisions of the patent law, the term of invention patent is 20 years. The term of utility model patent and design patent is 10 year. In other words, if it is an invention patent, the authority of this patent will be your own after 20 years. After 20 years, you will no longer enjoy the exclusive right of this patent. This technology is an open technology that everyone can use. The same is true for utility models and appearance patents. Only the validity period is 10 year. The validity of a patent begins from the date of application, not from the effective date of the patent. Patent application date and patent effective date are not the same concept, so we must distinguish this clearly.