According to the provisions of my country’s patent law, an invention patent generally goes through the following procedures from application to authorization: 1. Provide a disclosure letter and entrust an agency to write the application documents, which usually takes 20 days to one month ( Those who do not entrust an agency can omit this step) 2. Submit the application documents, obtain the acceptance notice from the Patent Office, determine the application date, and submit an advance public statement and request substantive examination on the day of submitting the documents, which can speed up the examination process 3 , The Patent Office will conduct a formal review of the patent application documents, which takes about 2-3 months. After passing the preliminary examination, it will enter the public preparation stage 4. The Patent Office will publish the invention application documents, which will take about 6-8 months. 5. The Patent Office will conduct a review of the invention patent documents. The substantive examination takes about one and a half to two years. During this period, the examiner communicates with the applicant on the essential content of the invention, that is, the novelty, creativity and practicality (the entrusted agency communicates with the agency to determine the appropriate protection scope of the invention), and goes back and forth. The communication may go back and forth several times until the changes are made to the examiner's satisfaction. 6. The Patent Office issues an authorization notice. 7. The applicant goes through the procedures to receive the patent certificate. 8. The patent certificate is obtained after about 2-3 months. The whole process lasts about 2 and a half years. to 3 years, the specific time depends on the review speed of the examiner and the thoroughness of the applicant's information.