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PCE
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DIFF Subgroup
G21C 3/33

Supporting or hanging of elements in the bundle (spacer grids G21C3/34); Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles

Introduced: January 1990

Title

Titles differ between systems:

IPC: Supporting or hanging of elements in the bundle; Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles

CPC: Supporting or hanging of elements in the bundle (spacer grids G21C3/34); Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles

Full Title

Full titles differ between systems:

IPC:

Reactor fuel elements or their assemblies; Selection of substances for use as reactor fuel elements > Assemblies of a number of fuel elements in the form of a rigid unit > Bundles of parallel pin-, rod-, or tube-shaped fuel elements > Supporting or hanging of elements in the bundle; Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles

CPC:

Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements > Assemblies of a number of fuel elements in the form of a rigid unit > Bundles of parallel pin-, rod-, or tube-shaped fuel elements > Supporting or hanging of elements in the bundle (spacer grids G21C3/34); Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 1990.

Child Classifications

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Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

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