1. It usually takes 3-5 months after the application is submitted for public review (in the case of requesting early disclosure, if there is no request for early disclosure, it will be delayed to 18 months after the application date, that is, one Year and a half); 2. Substantive examination takes 1-2 years, variable; invention patents need to go through a substantive examination process, that is, the examiner will search for similar documents about the technical content of the patent in the patent office database (worldwide), and then based on the found Compare the technical literature with this patent, comment on the areas where this patent does not comply with the provisions of the patent law (usually raising inventiveness issues on the basis of writing specifications), and then issue an examination opinion to the applicant, who must respond. If the examiner still cannot be convinced, the second, third, and Nth examination opinions will be issued until the patent is granted or rejected. 3. After receiving the authorization notice and paying the fee, it will take about 2 months to produce the certificate. Therefore, applying for an invention patent is a relatively long process, so please wait patiently for the review results.