The international stage is similar to a registration procedure (which is handled by the World Patent Organization).
the national stage is the procedure of examination and authorization (which is the responsibility of patent offices in various countries). When the PCT international application enters the national stage, it is necessary to translate the application documents into the official language of the applicant country, and its main procedures are the same as those for applying for a patent in China, including: application entry, publication, substantive examination, authorization and other procedures.
PCT international patent application has the following advantages:
1. To apply for a patent through PCT, you can apply for a patent in many countries only by submitting an international patent application, instead of submitting a patent application to each country separately, which provides convenience for patent applicants to apply for a patent in foreign countries;
2. Through the PCT, the applicant can go through the formalities for the international patent application to enter every country within 3 months after the date of filing the patent application for the first time. This prolongs the time to enter the national stage. During this period, the patent applicant can investigate the market, the commercial prospect of the invention and other factors, and decide whether to continue to apply for foreign patents before spending a lot of money to enter the national stage. If you decide not to apply for a patent abroad after investigation, you can save money.
the following link is attached for your reference:
/ztzl/ywzt/PCT/jczs/21612/t216123 _ 137444.html.