How to write the patent claim?

1. The independent claim is divided into two parts. 1. Preface: indicate the subject name of the invention or utility model, as well as the necessary technical features and existing technologies of the invention or utility model; 2. Characteristic part: It is the core content of the claim to state the technical characteristics that distinguish the invention or utility model from the existing technology. This part should be related to the above content with the words "characterized by" or similar words after the preface. Both the preamble and the characteristic part define the protection scope of the invention or utility model.

2. The dependent claim is also divided into two parts. 1. Citation part: indicate the cited claim number and the subject name of the invention or utility model. For example: "According to the claim1………"; Second, the defining part: stating the additional technical features of the invention or utility model is a supplement to the independent claim and further defines the technical features of the cited part. It should also be linked with "characterized by ...". Generally speaking, the dependent claims should supplement and improve the technical features of this patent from multiple angles as much as possible.

3. Common mistakes in writing claims. It is a common mistake for beginners to advocate pure function. In general, products must use structured technical features to write claims, methods must use step-by-step or conditional claims, and functional or mixed claims cannot be used. This kind of writing is easy to go beyond the scope of the manual and expand the scope of protection.