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ARTICLE · 03 FEBRUARY 2026

Korea vs. China: A Comparative Look At Invention Patent Examination Procedures

Chang Tsi & Partners
Chang Tsi & Partners
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Chang Tsi & Partners

Chang Tsi & Partners

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In the global stage of patent portfolio planning, South Korea and China have always been important destinations for patent applications.

ChinaIntellectual Property

In the global stage of patent portfolio planning, South Korea and China have always been important destinations for patent applications. The invention patent examination systems of the two countries are similar in their macro framework, but upon close examination, there are non-negligible differences in key timelines and specific procedures.
In particular, for applicants accustomed to the examination rhythm in China, the procedural arrangements in South Korea upon receiving a Final Rejection contain certain “unconventional” elements that, if not well understood, may affect strategic planning and grant opportunities.

1. Filing and Request for Substantive Examination

In South Korea, after the submission of an invention patent application, the applicant must file a request for substantive examination with the Korean Intellectual Property Office (KIPO) within three years from the filing date or the priority date; otherwise, the application will be deemed withdrawn.

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