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IPC Main Group
G21H 3/00

Arrangements for direct conversion of radiation energy from radioactive sources into forms of energy other than electric energy, e.g. light

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
PHYSICS
Class:
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
Subclass:
OBTAINING ENERGY FROM RADIOACTIVE SOURCES; APPLICATIONS OF RADIATION FROM RADIOACTIVE SOURCES, NOT OTHERWISE PROVIDED FOR; UTILISING COSMIC RADIATION

Filing statistics

IPC G21H 3/00 belongs to the parent subclass G21H, which recorded 1,227 patent applications worldwide between 2013 and 2023. Annual filings grew from 83 in 2013 to 115 in 2023 (+39%), peaking at 159 applications in 2021. 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

Related Keywords

CONVERSION of radioactive radiations

1 direct subcode

Child Classifications

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  • G21H 3/02 in which material is excited to luminesce by the radiation

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