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IPC Subgroup
G21C 3/06

Casings; Jackets

Introduced: September 1968

Last revised: January 2006

Full Title

Reactor fuel elements or their assemblies; Selection of substances for use as reactor fuel elements > Fuel elements > Constructional details > Casings; Jackets

Classification Context

Section:
PHYSICS
Class:
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
Subclass:
NUCLEAR REACTORS

5 direct subcodes

Child Classifications

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  • G21C 3/07 characterised by their material, e.g. alloys
  • G21C 3/08 provided with external means to promote heat-transfer, e.g. fins, baffles, corrugations
  • G21C 3/1 End closures
  • G21C 3/12 Means forming part of the element for locating it within the reactor core; External spacers for this purpose
  • G21C 3/14 Means forming part of the element for inserting it into, or removing it from, the core; Means for coupling adjacent elements

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