Legal analysis: application process of invention patent: 1. Search for patents of the same type, you can search independently or entrust an agency to conduct a more comprehensive search. 2. Prepare the application documents and submit them to the application step. 3. get the admission notice. 4. Preliminary review. Before the preliminary examination, the application for a patent for invention must be examined in confidentiality, and if confidentiality is required, it shall be handled in accordance with the confidentiality procedures. 5. Publishing stage. 6. Substantive review. To conduct a comprehensive review of whether the patent application is novel, creative, practical and other substantive conditions stipulated in the patent law. 7. Authorization stage.

Legal basis: People's Republic of China (PRC) Patent Law.

Article 3 The patent administrative department of the State Council is responsible for the management of patent work throughout the country; Accept and examine patent applications in a unified manner and grant patent rights according to law. The departments for patent administration under the people's governments of provinces, autonomous regions and municipalities directly under the Central Government shall be responsible for patent administration within their respective administrative areas.

Article 4 Where an invention-creation applying for a patent involves national security or vital interests and needs to be kept confidential, it shall be handled in accordance with the relevant provisions of the state.