Legal analysis: 1. The time limit for filing a request for invalidation is any time from the date of announcement of the grant of patent rights.
2. The time limit for providing evidence in the invalidation procedure. The invalidation requester shall make up the reasons and submit new evidence within one month from the date of filing the request for invalidation, otherwise, it may not be considered.
3. Time limit for invalidation request fee. The invalidation requester shall pay the invalidation request fee within one month from the date of filing the invalidation request.
4. During the invalidation procedure, the power of attorney does not comply with the regulations and needs to be corrected within the time limit. If the petitioner entrusts a patent agency but fails to submit a letter of authorization to the Patent Reexamination Board or fails to specify the authorization authority, the petitioner shall make corrections within 7 days from the date of receipt of the notice.
Legal basis: "Patent Law of the People's Republic of China" Article 46 The Patent Reexamination Board shall promptly review and make a decision on a request to declare the patent right invalid, and notify the requester and the patent right people. The decision to declare the patent right invalid shall be registered and announced by the patent administration department of the State Council. Anyone who is dissatisfied with the decision of the Patent Reexamination Board to declare the patent right invalid or to maintain the patent right may file a lawsuit in the People's Court within three months from the date of receipt of the notice. The people's court shall notify the other party in the invalidation request procedure to participate in the litigation as a third party.