G21B FUSION REACTORS (uncontrolled reactors G21J)
Description
G21B covers controlled nuclear fusion reactors and associated systems for energy production. This includes reactor designs (inertial confinement, magnetic confinement, and alternative approaches), plasma generation and containment technologies, fuel handling and breeding systems, and reactor components such as magnets, vacuum vessels, and cooling systems. The classification encompasses both experimental fusion facilities and commercial power generation concepts, including supporting technologies for achieving and maintaining the conditions necessary for sustained fusion reactions.
Filing statistics
CPC subclass G21B recorded 4,371 patent applications worldwide between 2013 and 2023. Annual filings grew from 222 in 2013 to 507 in 2023 (+128%). The most active applicants in class G21 are CHINA GENERAL NUCLEAR POWER CORPORATION (1,383 applications), WESTINGHOUSE ELECTRIC CORPORATION (1,347 applications) and KOREA ATOMIC ENERGY RESEARCH INSTITUTE (1,303 applications).
Source: EPO PATSTAT, worldwide filings
2 direct subcodes
Child Classifications
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Top Applicants
Top 10 applicants by patent filingsfor class G21, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINA GENERAL NUCLEAR POWER CORPORATION 1,383
- WESTINGHOUSE ELECTRIC CORPORATION US 1,347
- KOREA ATOMIC ENERGY RESEARCH INSTITUTE KR 1,303
- CGN POWER COMPANY 1,156
- CHINA NUCLEAR POWER ENGINEERING COMPANY 1,149
- KOREA HYDRO & NUCLEAR POWER COMPANY KR 1,146
- NUCLEAR POWER INSTITUTE OF CHINA 1,086
- CHINESE ACADEMY OF SCIENCES 765
- CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 763
- CHINA INSTITUTE OF ATOMIC ENERGY 659