Can the patent be renewed after 20 years?

Patents can be renewed after 20 years. Where a party concerned delays the time limit specified in the Patent Law or these Detailed Rules or the time limit specified by the patent administration department in the State Council for justifiable reasons, resulting in the loss of his rights, he may explain the reasons to the patent administration department in the State Council within 2 months from the date of receiving the notice from the patent administration department in the State Council and request the restoration of his rights. Article 7 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, within two months from the date of removal of the obstacle, at the latest within two years from the date of expiration of the time limit, explain the reasons to the patent administration department in the State Council and attach relevant supporting documents to request the restoration of his rights. Where a party concerned delays the time limit specified in the Patent Law or these Detailed Rules or the time limit specified by the patent administration department in the State Council for justifiable reasons, resulting in the loss of his rights, he may explain the reasons to the patent administration department in the State Council within 2 months from the date of receiving the notice from the patent administration department in the State Council and request the restoration of his rights. 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 62 of the Patent Law.