According to Article 6 of the Detailed Rules for the Implementation of the Patent Law:
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.
Extended data:
In addition to the circumstances specified in the preceding paragraph, if a party 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 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. ?
If a party requests the restoration of rights in accordance with the provisions of the first paragraph or the second paragraph of this article, it shall submit a request for the restoration of rights, explain the reasons, attach relevant supporting documents when necessary, and go through the corresponding procedures that should be handled before losing the rights; In accordance with the provisions of the second paragraph of this article, those who request the restoration of their rights shall also pay the fees. ?
Where a party requests to extend the time limit specified by the patent administration department in the State Council, it shall explain the reasons to the patent administration department in the State Council before the expiration of the time limit and go through the relevant formalities. ?
The provisions of the first and second paragraphs of this article shall not apply to the time limit stipulated in Articles 24, 29, 42 and 68 of the Patent Law. ?
Where a patent application involves national defense interests and needs to be kept confidential, it shall be accepted and examined by the national defense patent agency; Where the patent application accepted by the patent administrative department of the State Council involves national defense interests and needs to be kept confidential, it shall be handed over to the national defense patent institution for examination in time. If the national defense patent agency finds no reasons for rejection after examination, the patent administration department of the State Council shall make a decision to grant the national defense patent right. ?
Baidu Encyclopedia-Detailed Rules for the Implementation of People's Republic of China (PRC) Patent Law