Arrangements for converting chemical elements by electromagnetic radiation, corpuscular radiation or particle bombardment, e.g. producing radioactive isotopes (separation of different isotopes of the same element B01D59/00)

Filing statistics

CPC G21G 1/00 belongs to the parent subclass G21G, which recorded 4,488 patent applications worldwide between 2013 and 2023. Annual filings grew from 280 in 2013 to 401 in 2023 (+43%), peaking at 497 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

4 direct subcodes

Child Classifications

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G21G 1/0005
G21G 1/001
G21G 1/02 in nuclear reactors (by thermonuclear reactions G21B; conversion of nuclear fuel G21C)
G21G 1/04 outside nuclear reactors or particle accelerators

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