1. If the applicant fails to request substantive examination from the state patent administration department within 3 years from the date of application, the application shall be deemed to have been withdrawn.
2. Where the Patent Office requires the applicant to state his opinions or amend the application within a specified time limit after substantive examination, if the applicant fails to reply within the time limit without justifiable reasons, the application shall be deemed to have been withdrawn.
In addition, according to Article 44 of the Patent Law, if the annual fee is not paid as required, the patent right will be terminated before the expiration of the time limit. The patentee shall pay the annual fee from the year when the patent right is granted.