What is the main requirement for a Divisional Application in relation to its parent application?

The main requirement for a Divisional Application is that it must only disclose matters from the parent application. A Divisional Application is specifically intended to separate and protect distinct inventions that were originally disclosed in a single parent application. The purpose of filing a Divisional is to comply with the requirement that each application must focus on a single invention, as stipulated by patent law.

This means that any claims in the Divisional Application must be based on the original content of the parent application. The scope of the Divisional cannot introduce new matter or unrelated facts that were not included in the parent application. By ensuring that a Divisional Application is limited to the disclosures of the parent, it maintains the integrity of the original filing and conforms to the legal requirements surrounding patentability and the content of patent applications.

In contrast, introducing additional inventions or unrelated facts would conflict with the legal requirements for divisional applications, and while separate fees and documentation are necessary for the filing process, they are not the primary requirement concerning the disclosure relationship to the parent application.