Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
CPC Main Group
G21K 1/00

Arrangements for handling particles or ionising radiation, e.g. focusing or moderating

8 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • 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

  1. CHINA GENERAL NUCLEAR POWER CORPORATION 1,383
  2. WESTINGHOUSE ELECTRIC CORPORATION US 1,347
  3. KOREA ATOMIC ENERGY RESEARCH INSTITUTE KR 1,303
  4. CGN POWER COMPANY 1,156
  5. CHINA NUCLEAR POWER ENGINEERING COMPANY 1,149
  6. KOREA HYDRO & NUCLEAR POWER COMPANY KR 1,146
  7. NUCLEAR POWER INSTITUTE OF CHINA 1,086
  8. CHINESE ACADEMY OF SCIENCES 765
  9. CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 763
  10. CHINA INSTITUTE OF ATOMIC ENERGY 659