CPC Main Group
G21C 13/00 Pressure vessels; Containment vessels; Containment in general (for chemical or physical processes B01J3/00; pressure vessels in general F16J12/00)
Filing statistics
CPC G21C 13/00 belongs to the parent subclass G21C, which recorded 23,858 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,031 in 2013 to 2,125 in 2023 (+5%), peaking at 2,595 applications in 2021. The most active applicants in class G21 are CHINA GENERAL NUCLEAR POWER CORPORATION (1,383 applications), WESTINGHOUSE ELECTRIC CORPORATION (1,347 applications) and KOREA ATOMIC ENERGY RESEARCH INSTITUTE (1,303 applications).
Source: EPO PATSTAT, worldwide filings
3 direct subcodes
Child Classifications
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- G21C 13/02 Details
- G21C 13/08 Vessels characterised by the material; Selection of materials for pressure vessels
- G21C 13/10 Means for preventing contamination in the event of leakage,
Top Applicants
Top 10 applicants by patent filingsfor 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