The restoration of the lost patent right is: within 2 months from the date of removing the obstacle, at the latest within 2 years from the date of expiration of the time limit, you can request the patent administration department of the State Council to restore the right. Except for irresistible reasons, if the party concerned delays the time limit specified in 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.
legal ground
Paragraph 1 of Article 6 of the Detailed Rules for the Implementation of the Patent Law of People's Republic of China (PRC)
Where the party concerned delays the time limit specified in the Patent Law or these Rules 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 2 months from the date when the obstacle is removed, or at the latest within 2 years from the date when the time limit expires.