How long is the validity period of an invention patent? When does it start? The validity period of an invention patent is calculated from the date of patent application. Countries have their own clear regulations on the validity period of invention patents, which generally range from 10 to 20 years. In China, this period is defined as 20 years, which is a full 10 years longer than the protection period for utility models and designs. How long is the validity period of an invention patent? When does it start? 1. Article 42 of the Chinese Patent Law stipulates that the term of invention patent rights is 20 years, and the term of utility model patent rights and design patent rights is 10 years, both calculated from the date of application. 2. The application date referred to in the Patent Law refers to the priority date if there is priority. 3. Pay attention to the term of patent protection when applying for it. When using other people’s patents, you must search the term with the Patent Office before choosing to use it. The starting point and end point of the invention patent term 1. The validity period of an invention patent should be from the date of authorization announcement to 20 years after the date of application, while for utility model and design patents, the validity period should be from the date of authorization announcement to 10 years after the date of application. 2. The starting point of the validity period of the invention patent right is the date of authorization announcement, and the end point is the expiration date of 20 years from the date of application. 3. The above validity period is based on the assumption that the patentee has paid the corresponding fees (such as annual fees) on time, and the patent has not been invalidated during this period. 4. If the patentee fails to pay the annual fee within the prescribed time limit, or the patent is invalidated, the validity period of the patent will end early. Maintaining the validity period of the patent right is predicated on the patentee paying the annual fee in accordance with the regulations. In the following circumstances, the patent right is terminated early: 1. The patentee fails to pay the annual fee in accordance with the regulations. 2. The patentee declares in writing that it has given up its patent rights. How long is the validity period of an invention patent? When does it start? We have answered this question for you here. If you have more questions about patents, you can continue to pay attention to Bajie Intellectual Property, or contact us by phone.