How to determine the invalid date of patent right

How to determine the invalid date of patent right 3. How to determine the expiry date of patent right? Many people are not very clear about this. The following small series will introduce you to the relevant content, hoping to help you. How to determine the validity period of patent right? Date of Patent Right According to Article 42 of China's Patent Law, the term of invention patent right is 20 years, and the term of utility model patent right and design patent right is 10 years, all of which are counted from the date of application. How to determine the expiry date of patent right II. Termination of patent right The termination of patent right can be divided into normal termination and abnormal termination. The reasons that can cause the termination of the patent right are: (1) The patent right is terminated due to the expiration of the term; (2) The patent right is terminated due to failure to pay the patent certificate fee; (3) The patentee fails to pay the annual fee as required, and the patent right is terminated; (4) The patentee gives up his life in writing and the patent right is terminated. After the termination of the patent right, the inventions protected by the patent right will become the common wealth of the whole society, and anyone can use them freely and free of charge. According to the provisions of China's patent law, any unit or individual may apply to declare the patent invalid as long as it thinks that the grant of the patent right does not conform to the provisions of the patent law.