How to recover after the termination of patent right

1, the parties delay the deadline due to irresistible reasons, resulting in loss of rights. Within 2 months from the date of removal of obstacles, but at the latest within 2 years from the date of expiration of the time limit, you may explain the reasons to the Patent Office and attach relevant supporting documents to request the restoration of their rights; 2. If a party delays the deadline for justifiable reasons, resulting in the loss of rights, he may explain the reasons to the Patent Office within 2 months from the date of receiving the notice from the Patent Office and request the restoration of rights; 3. If the maintenance fee or annual fee is not paid as scheduled, you can only request the Patent Office to restore its rights on irresistible grounds.