CPC Main Group
G21K 1/00 Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
8 direct subcodes
Child Classifications
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- G21K 1/02 using diaphragms, collimators
- G21K 1/06 using diffraction, refraction or reflection, e.g. monochromators (G21K1/10, G21K7/00 take precedence)
- G21K 1/08 Deviation, concentration or focusing of the beam by electric or magnetic means (electron-optical arrangements in electric discharge tubes H01J29/46; )
- G21K 1/10 Scattering devices; Absorbing devices; Ionising radiation filters
- G21K 1/14 using charge exchange devices, e.g. for neutralising or changing the sign of the electrical charges of beams (producing or accelerating neutral particle beams H05H3/00)
- G21K 1/16 using polarising devices, e.g. for obtaining a polarised beam
- G21K 1/20 for confining charged particles or handling confined charged particles, e.g. ion traps
- G21K 1/30 for confining neutral particles or handling confined neutral particles, e.g. atom traps
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