CPC Subgroup Additional Only
C21B 2400/022 Methods of cooling or quenching molten slag
Full Title
Treatment of slags originating from iron or steel processes > Physical or chemical treatment of slags > Methods of cooling or quenching molten slag
3 direct subcodes
Child Classifications
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- C21B 2400/024 with the direct use of steam or liquid coolants, e.g. water
- C21B 2400/026 using air, inert gases or removable conductive bodies
- C21B 2400/028 with the permanent addition of cooled slag or other solids
Top Applicants
Top 10 applicants by patent filingsfor class C21, 2013–2023, worldwide · Source: EPO PATSTAT
- JFE STEEL JP 8,270
- NIPPON STEEL CORPORATION JP 5,222
- POSCO (POHANG IRON AND STEEL COMPANY) KR 4,824
- JFE STEEL 3,311
- ARCELORMITTAL LU 3,239
- NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,659
- HYUNDAI STEEL COMPANY KR 1,492
- ANGANG STEEL COMPANY 1,318
- BAOSHAN IRON & STEEL COMPANY 1,233
- KOBE STEEL JP 1,228