G21D 3/08 Regulation of any parameters in the plant
Full Title
Control of nuclear power plant (control of nuclear reaction in general G21C7/00) > Regulation of any parameters in the plant
Filing statistics
CPC G21D 3/08 belongs to the parent subclass G21D, which recorded 7,355 patent applications worldwide between 2013 and 2023. Annual filings grew from 666 in 2013 to 782 in 2023 (+17%), peaking at 866 applications in 2021. 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
3 direct subcodes
Child Classifications
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- G21D 3/10 by a combination of a variable derived from neutron flux with other controlling variables, e.g. derived from temperature, cooling flow, pressure
- G21D 3/12 by adjustment of the reactor in response only to changes in engine demand
- G21D 3/18 by adjustment of plant external to the reactor only in response to change in reactivity
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