DIFF Main Group
G21C 15/00 Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
Introduced: September 1968
IPC and CPC are identically structured here. All 7 subcodes exist in both systems.
6 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G21C 15/02 Arrangements or disposition of passages in which heat is transferred to the coolant; IPC+CPC Available in IPC and CPC
- G21C 15/16 comprising means for separating liquid and steam (separating in general B01D; steam traps F16D) IPC+CPC Available in IPC and CPC
- G21C 15/18 Emergency cooling arrangements; Removing shut-down heat +1 CPC IPC+CPC Available in IPC and CPC
- G21C 15/20 Partitions or thermal insulation between fuel channel and moderator IPC+CPC Available in IPC and CPC
- G21C 15/22 Structural association of coolant tubes with headers (joints of tubes in general F16L) IPC+CPC Available in IPC and CPC
- G21C 15/24 Promoting flow of the coolant (electrodynamic pumps H02K44/02) IPC+CPC Available in IPC and CPC
- G21C 15/28 Selection of specific coolants (if serving as the moderator G21C5/12; compositions per se C09K5/00; ); IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class G21,2013–2023, worldwide · Source: EPO PATSTAT
- CHINA GENERAL NUCLEAR POWER CORPORATION 2,364
- CGN POWER COMPANY 1,899
- CHINA NUCLEAR POWER ENGINEERING COMPANY 1,870
- NUCLEAR POWER INSTITUTE OF CHINA 1,517
- KOREA ATOMIC ENERGY RESEARCH INSTITUTE KR 1,367
- WESTINGHOUSE ELECTRIC CORPORATION US 1,295
- KOREA HYDRO & NUCLEAR POWER COMPANY KR 1,196
- CHINESE ACADEMY OF SCIENCES 1,044
- CHINA INSTITUTE OF ATOMIC ENERGY 1,011
- HITACHI-GE NUCLEAR ENERGY 955
Top Applicants (CPC)
Class G21,2013–2023, worldwide · Source: EPO PATSTAT
- CHINA GENERAL NUCLEAR POWER CORPORATION 1,383
- WESTINGHOUSE ELECTRIC CORPORATION US 1,347
- KOREA ATOMIC ENERGY RESEARCH INSTITUTE KR 1,303
- CGN POWER COMPANY 1,156
- CHINA NUCLEAR POWER ENGINEERING COMPANY 1,149
- KOREA HYDRO & NUCLEAR POWER COMPANY KR 1,146
- NUCLEAR POWER INSTITUTE OF CHINA 1,086
- CHINESE ACADEMY OF SCIENCES 765
- CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 763
- CHINA INSTITUTE OF ATOMIC ENERGY 659