This is an accepted procedure9 Nov 2018 11:40
What is a worldwide patent?
The international treaty that authorizes the filing of a single patent application to be treated as a patent application in countries around the world is the Patent Cooperation Treaty, most commonly referred to as the PCT. ... Patents are granted by individual countries, not by any international authority.26 Dec 2015
The Patent Cooperation Treaty (PCT) is an international patent law treaty, concluded in 1970. It provides a unified procedure for filing patent applications to protect inventions in each of its contracting states. A patent application filed under the PCT is called an international application, or PCT application.