Article 43 An application for division filed in accordance with the provisions of Article 42 of these Rules may retain the original filing date, and if it enjoys priority, it may retain the priority date, but it shall not exceed the scope recorded in the original application.
The divisional application shall go through the relevant formalities in accordance with the provisions of the Patent Law and these Rules.
The request for divisional application shall indicate the application number and date of the original application. When submitting a divisional application, the applicant shall submit a copy of the original application documents; Where the original application enjoys priority, a copy of the priority document of the original application shall be submitted.
As can be seen from the above provisions, there are still great restrictions on the revision of the division, and the division shall not exceed the scope recorded in the original application (mother case).