What is PCT and how does PCT apply for a patent?

In this way, after any member of the Patent Cooperation Treaty applies for invention for the first time, the applicant should be within a specific period (i.e. the priority period). What is PCT and how does PCT apply for a patent? What is 1.PCT? As can be seen from the name, the Patent Cooperation Treaty is an international cooperation treaty in the patent field. Since the adoption of the Paris Convention, it has been regarded as the most important symbol of the progress of international cooperation in this field. However, it mainly involves the coordination and rationality of filing, retrieval and examination of patent applications and the dissemination of technical information contained therein. PCT does not authorize international patents: the task and responsibility of granting patents can only be undertaken by patent offices in various countries seeking patent protection or institutions (designated offices) exercising their functions and powers. PCT is not a competition with Paris Convention, but a supplement to Paris Convention. In fact, this is a special agreement under the Paris Convention, which is only open to the member countries of the Paris Convention. Second, what is the way for PCT to apply for a patent? In this way, after the applicant applies for an invention-creation for the first time in any member country of the Patent Cooperation Treaty, he applies for the same invention-creation in other member countries within a specific period (i.e. the priority period: invention or utility model 12 months), and also enjoys the priority stipulated in the Paris Convention. The biggest difference between applying for foreign-related patents in this way and applying for foreign-related patents one by one is that the PCT way consists of two parts: the international stage and the national stage, while the one-by-one way consists of only a part of the national stage; PCT application is to enter the international acceptance bureau designated by the International Intellectual Property Organization to complete the international examination, then enter the national stage to be examined by the patent authorities of the corresponding countries, and finally make a decision.