According to the Patent Law, if a party delays the time limit specified in the Patent Law and its detailed rules for implementation or the time limit specified by the patent administration department in the State Council due to irresistible reasons, resulting in the loss of his rights, he may request the patent administration department in the State Council to restore his rights within two months from the date when the obstacle is removed, or at the latest within two years from the date when the time limit expires.
In addition to the circumstances specified in the preceding paragraph, if the party concerned delays the time limit specified in the Patent Law or the detailed rules for the implementation of the Patent Law or the time limit specified by the patent administration department in the State Council for other legitimate reasons, resulting in the loss of his rights, he may request the patent administration department in the State Council to restore his rights within 2 months from the date of receiving the notice from the patent administration department in the State Council.