On the way to patent application, how to file a divisional application?

The applicant may file a divisional application before receiving the notice of granting patent right issued by the Patent Office, or file a divisional application within two months from the date of receiving the notice of granting patent right. However, if the patent application has been rejected and taken effect, or has been withdrawn or deemed to have been withdrawn but has not been restored, no divisional application may be filed.

Where a divisional application is filed, the filing date and application number of the original application shall be filled in the requested divisional application column, and the filing date of the original application shall be the filing date of the divisional application. Various statutory time limits for divisional applications, such as the time limit for submitting substantive examination requests and the time limit for submitting priority certification materials, shall be counted from the original application date. For various expired time limits, the applicant can go through various formalities within two months from the date of submitting the divisional application; Not expired.