Within three months.
Within three months from the date of receipt of the rejection decision made by the Patent Office, the patent applicant may submit a reexamination request to the Patent Reexamination Board. If the time limit for submitting the reexamination request does not meet the above provisions, the reexamination request shall not be considered. be accepted.
If the time limit for filing a reexamination request does not comply with the above provisions, but the reexamination requester files a request for restoration of rights after the Patent Reexamination Board makes a decision not to accept the application, if the request for restoration of rights complies with the Implementing Rules of the Patent Law The provisions of Articles 7 and 93 on the restoration of rights are allowed, and the request for review shall be accepted. If the relevant provisions are not met, the restoration shall not be granted.