After the patent right has been granted and announced by the patent administration department of the State Council, if any unit or individual thinks that the patent right does not conform to the Patent Law of People's Republic of China (PRC) and its detailed rules for implementation, it may, from the date of announcement, request the the State Council Patent Reexamination Board to declare the announced patent invalid. The invalidation of the patent right shall be made by the Patent Reexamination Board and registered and announced by the patent administration department of the State Council. The applicant shall file a written application for invalidation of the patent right with the the State Council Patent Reexamination Board, and attach relevant evidence in duplicate. The application shall specify the reasons for invalidation and indicate the evidence on which each reason is based. The reason for the request for invalidation refers to the invention-creation that has been granted a patent under any of the following circumstances: (1) The invention or utility model is not novel, creative and practical, and its design is the same as or similar to the design publicly published in domestic and foreign publications or publicly used in China before the filing date, or conflicts with the legal rights previously obtained by others; (2) Failing to fully disclose the technical scheme or to write instructions or claims as required; (3) The amendment is beyond the scope of the original application documents; (4) The definitions of inventions, utility models and designs that do not conform to the provisions of the Patent Law; (5) Violating national laws, public interests or damaging social morality, or falling within the scope of not granting patent rights as stipulated in the Patent Law; (6) In the case of repeated authorization. After the applicant's application for invalidation of the patent right is accepted by the Patent Application Reexamination Board, the applicant may supplement, modify or add evidence within one month from the date of acceptance, and provide new evidence or modify or supplement the original evidence beyond the prescribed one-month period, and the Patent Application Reexamination Board may not consider it.