IPC Main Group
G21F 7/00 Shielded cells or rooms
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- Subclass:
- PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
Filing statistics
IPC G21F 7/00 belongs to the parent subclass G21F, which recorded 22,783 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,967 in 2013 to 2,134 in 2023 (+8%), peaking at 2,336 applications in 2020. 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
5 direct subcodes
Child Classifications
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- G21F 7/005 Shielded passages through walls; Locks; Transferring devices between rooms
- G21F 7/015 Room atmosphere, temperature or pressure control devices
- G21F 7/02 Observation devices permitting vision but shielding the observer
- G21F 7/04 Shielded glove-boxes
- G21F 7/06 Structural combination with remotely-controlled apparatus, e.g. with manipulators
Top Applicants
Top 10 applicants by patent filingsfor 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