Legal analysis: According to my country's "Patent Law" and its detailed rules, as well as the "Examination Guidelines", if the patent annual fee is not paid on time, the patent will be deemed to have been abandoned and the patent right will be terminated. Under normal circumstances, if a patent right restoration request is submitted and the reasons are stated within two months after receiving the notice of patent termination, the patent right may be restored. It is generally difficult to restore the patent right beyond this period.
Legal basis: "Detailed Implementation Rules for the Patent Law of the People's Republic of China" Article 6 If the party delays the time limit specified in the Patent Law or these Rules or the time limit specified by the Patent Administration Department of the State Council due to force majeure reasons , resulting in the loss of its rights, within two months from the date when the obstacle is eliminated, and at the latest two years from the date of expiration, it may request the patent administration department of the State Council to restore its rights.