1. PCT application process PCT international patent application has two stages: international stage and national stage. First apply for the international stage and then enter the national stage. The specific steps are as follows: (1) International stage: 1. File an application. The applicant can file a PCT international application in Chinese with the State Intellectual Property Office of China within 12 months from the filing date (priority date) of the earlier Chinese application and claim Chinese priority without submitting priority certification documents. 2. The State Intellectual Property Office of China accepts patent applications as the receiving office and issues international search reports as the international search authority. Applicants can modify their patent application documents based on the above search report. 3. International publication of patent applications. The International Bureau will publish the announcement 18 months from the priority date. 4. File a request for international preliminary examination. The applicant should submit a request for international preliminary examination at the same time as the application or within 19 months from the priority date, and pay the examination fee. 5. The international preliminary examination unit issues an international preliminary examination report, and the applicant can modify its patent application documents based on the report. Fees for the PCT international stage: The official fee for an individual application is more than 3,000, and the official fee for an enterprise application is about 10,000. The specific fee still needs to be calculated based on the exchange rate at the time; of course, this is only the official fee and does not include agency fees. Find out the difference. The service fees of different agencies are different, and you need to understand the details yourself. (2) National phase: The applicant can choose a PCT member country before the expiration of 30/31 months from the priority date and apply for its national patent to the patent office of that country, that is, enter the national phase of that country. When a PCT international application enters the national phase, the application documents need to be translated into the official language of the applicant country. The main procedures are the same as applying for a patent domestically, including: application entry, publication, substantive examination, authorization and other procedures. 2. Legal Provisions Article 26 of the Patent Law: When applying for a patent for invention or utility model, a request, description, abstract, claims and other documents shall be submitted. The request shall state the name of the invention or utility model, the name of the inventor, the name and address of the applicant, and other matters. The description shall provide a clear and complete description of the invention or utility model, which shall be subject to the ability of a person skilled in the technical field to realize it; when necessary, there shall be accompanying drawings. The abstract should briefly describe the technical key points of the invention or utility model. The claims should be based on the description and clearly and briefly define the scope of patent protection requested. For inventions and creations that rely on genetic resources, the applicant shall state the direct source and original source of the genetic resource in the patent application document; if the applicant cannot explain the original source, the applicant shall state the reasons. Article 27 When applying for a design patent, a request, pictures or photos of the design, a brief description of the design and other documents shall be submitted. The relevant pictures or photos submitted by the applicant should clearly show the design of the product for which patent protection is sought. Article 28 The date when the patent administration department of the State Council receives the patent application documents is the filing date. If the application documents are mailed, the postmark date shall be the date of application. Regarding the PCT patent application process, most people apply for the international stage, but the scope that is really often involved is only used in one country. For many applicants, this is first of all to protect their patents from infringement, and secondly, it is a good preparation for the markets of other countries. Now many applicants have such considerations.