He patent cooperation treaty pct is an international treaty with more than 150 contracting states the pct makes it possible to seek patent protection for an invention simultaneously in a large number of countries by filing a single international patent application instead of filing several separate national or regional patent applications. 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. Patent cooperation treaty pct regulations under the pct as in force from july 1 2019 the patent cooperation treaty makes it possible to seek patent protection for an invention simultaneously in each of a large number of countries by filing an international patent application. Patent cooperation treaty 7 introductory provisions article 1 establishment of a union 1 the states party to this treaty hereinafter called the contracting states constitute a union for cooperation in the filing searching and examination of applications for the protection of inventions and for rendering special technical services. Mpep chapter 1800 patent cooperation treaty taken from the 9th edition of the mpep revision 082017 last revised jan 2018 updated in bitlaw in february 2018
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