First of all, submit a patent application, after preliminary examination by the Patent Office. The patent administration organ shall find out whether the application meets the requirements of the patent law on the form of application. Second, make it public as soon as possible after the preliminary examination. After receiving an application for a patent for invention, the Patent Office, after preliminary examination, finds that it meets the requirements, and shall publish it 18 months after the date of application. The Patent Office may publish its application at an early date upon the request of the applicant. Third, substantive review. An application for a patent for invention may, at the request of the applicant, be examined in substance at any time within 3 years from the date of filing; If the applicant fails to request substantive examination within the time limit without justifiable reasons, the application shall be deemed to have been withdrawn. When the Patent Office deems it necessary, it may examine the application for a patent for invention on its own. Fourth, authorize the registration announcement. If the application for a patent for invention is not found rejected after substantive examination, the Patent Office shall make a decision to grant the patent right for invention, issue a patent certificate for invention, and register and announce it at the same time. The invention patent right shall take effect as of the date of announcement. Legal basis: Article 26 of the Patent Law of People's Republic of China (PRC). To apply for a patent for invention or utility model, a request, specification, abstract, patent right and other documents shall be submitted. Article 2. Invention-creation as mentioned in this Law refers to inventions, utility models and designs.