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IPC Subgroup
G21K 1/1

Scattering devices; Absorbing devices

Introduced: July 1974

Last revised: January 2006

Full Title

Arrangements for handling particles or ionising radiation, e.g. focusing or moderating > Scattering devices; Absorbing devices

Classification Context

Section:
PHYSICS
Class:
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
Subclass:
HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES

Filing statistics

IPC G21K 1/1 belongs to the parent subclass G21K, which recorded 11,603 patent applications worldwide between 2013 and 2023. Annual filings declined from 1,350 in 2013 to 867 in 2023 (-36%). The most active applicants in class G21 are CHINA GENERAL NUCLEAR POWER CORPORATION (2,364 applications), CGN POWER COMPANY (1,899 applications) and CHINA NUCLEAR POWER ENGINEERING COMPANY (1,870 applications).

Source: EPO PATSTAT, worldwide filings

1 direct subcode

Child Classifications

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  • G21K 1/12 Resonant absorbers or driving arrangements therefor, e.g. for Mössbauer-effect devices

Top Applicants

Top 10 applicants by patent filingsfor class G21, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINA GENERAL NUCLEAR POWER CORPORATION 2,364
  2. CGN POWER COMPANY 1,899
  3. CHINA NUCLEAR POWER ENGINEERING COMPANY 1,870
  4. NUCLEAR POWER INSTITUTE OF CHINA 1,517
  5. KOREA ATOMIC ENERGY RESEARCH INSTITUTE KR 1,367
  6. WESTINGHOUSE ELECTRIC CORPORATION US 1,295
  7. KOREA HYDRO & NUCLEAR POWER COMPANY KR 1,196
  8. CHINESE ACADEMY OF SCIENCES 1,044
  9. CHINA INSTITUTE OF ATOMIC ENERGY 1,011
  10. HITACHI-GE NUCLEAR ENERGY 955