What are "revision in the international stage" and "revision in the national stage"

In the international stage of application, after receiving the international search report, the applicant may amend the patent claim according to Article 19 of the Patent Cooperation Treaty, and the amendment shall be submitted to the International Bureau within the prescribed time limit. In the process of international preliminary examination, the applicant may also modify the specification, drawings and claims according to Article 34 of the Patent Cooperation Treaty, and the modification shall not be submitted to the international preliminary examination unit. The above procedure is called modification in the international arena.

legal ground

Article 109 of the Detailed Rules for the Implementation of the Patent Law stipulates that for an international application for a patent right for utility model, the applicant may submit the revised specification, drawings and claims to the patent administration department of the State Council within 1 month from the date of going through the formalities for entering the national phase in China; For an international application for a patent for invention, the applicant for a patent for invention may take the initiative to propose amendments to the application for a patent for invention within three months from the date of notification at the substantive examination stage. The above amendments are called national amendments.