Application and Rights

International applications - PCT

Updated: Dec 31, 2018 Print
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What is Patent Cooperation Treaty?

The Patent Cooperation Treaty (PCT) assists applicants in seeking patent protection internationally for their inventions. By filing one international patent application under the PCT, applicants can simultaneously seek protection for an invention in 148 countries throughout the world.

China has become a member state of the Patent Cooperation Treaty (PCT) since January 1, 1994, and the National Intellectual Property Administration of China (CNIPA) has become a PCT receiving office and been appointed as an International Searching Authority and an International Preliminary Examination Authority since the same time. Chinese nationals and residents can file an international application through the CNIPA.

To learn more about it, please read PCT Applicant's Guide.

General information

International searching authorities


International preliminary examination


Note: Since August 28, 2018, the English name of the intellectual property administration of China has been changed to National Intellectual Property Administration of China (CNIPA) from State Intellectual Property Office (SIPO).

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