How long does it take to apply for an international patent?

The time of international patent application varies with many factors, including patent type, application field, applicant group, complexity of technical field, etc. Generally speaking, an international patent application may take two to three years. This time is roughly divided into the following stages:

International application stage: It takes about 12 months to draft and submit an international patent application. In this process, applicants need to prepare application documents and submit them to international application acceptance bureaus, such as the Patent Office of the International Intellectual Property Office.

International preliminary examination stage: after the international application stage, the applicant needs to enter the national stage within 30 months, that is, submit the application documents in the selected country or region and go through the authorization procedure. In the international preliminary examination stage, the expert group will review the application documents and issue an international preliminary examination report. The time of this stage depends on the complexity of the review and the speed of the applicant's reply to the preliminary report.

National stage: The application procedure and time for the national stage vary from country to country, and most countries need 1-2 years to complete the authorization procedure. At this stage, applicants need to submit application documents and pay relevant fees according to the regulations of various countries. At the same time, the applicant also needs to communicate with patent offices in various countries to ensure the smooth progress of the application.

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