1. Preparation of application documents: Prepare an international application meeting the requirements of PCT format, which should include patent request, specification, patent claim, drawings and abstract, etc. These documents need to be submitted in an internationally accepted language (such as English).
2. Submit an international application: submit the prepared application documents to the international application acceptance bureau, such as the PCT acceptance bureau of the World Intellectual Property Organization or a national patent office as the PCT application acceptance bureau.
3. International search: the international search unit will search your patent application, find the existing technical documents that may affect your patentability, and put forward preliminary opinions on the patentability of the invention. You will receive an international search report and written comments.
4. International publication: From the earliest application date 18 months later, the International Bureau will be responsible for the international publication of your international application.
5. Supplementary international search (optional): If necessary, supplementary international search can be conducted, usually by other international search units that do not participate in the main search.
6. International preliminary examination (optional): The international preliminary examination unit may be required to conduct patent analysis on the revised application, which usually occurs after international publication.
7. Entering the national phase: After the PCT procedure is completed, it is necessary to enter the national phase of each country wishing to obtain a patent within the specified time, submit the corresponding application documents and meet the specific requirements of each country.
The above is the introduction of "how to apply for a patent in the world", I hope it will help you.