Under what circumstances does the patent right expire?

The circumstances that lead to the invalidation of patent right are as follows: the application for exercising patent right violates the principle of good faith; Failing to grant a patent in accordance with the provisions of Article 25 of the Patent Law; Failing to modify the patent application documents as required; Violation of laws and regulations and public order and good customs; Inventions and utility models are not novel, creative and practical.

legal ground

Article 45 of the Patent Law of People's Republic of China (PRC) Since the date when the patent administration department in the State Council announced the grant of the patent right, any unit or individual may request the patent administration department in the State Council to declare the patent right invalid if it considers that the grant of the patent right is not in conformity with the relevant provisions of this Law. Article 20 The application for patent and the exercise of patent right shall follow the principle of good faith. Do not abuse the patent right to harm the public interest or the legitimate rights and interests of others. Abuse of patent rights, exclusion or restriction of competition, which constitutes a monopolistic behavior, shall be dealt with in accordance with the Anti-Monopoly Law of the People's Republic of China.