CPC Subgroup
C22B 19/04 Obtaining zinc by distilling
Full Title
Obtaining zinc or zinc oxide > Obtaining zinc by distilling
6 direct subcodes
Child Classifications
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- C22B 19/06 in muffle furnaces
- C22B 19/08 in blast furnaces
- C22B 19/10 in reverberatory furnaces
- C22B 19/12 in crucible furnaces
- C22B 19/14 in vertical retorts
- C22B 19/16 Distilling vessels
Top Applicants
Top 10 applicants by patent filingsfor class C22, 2013–2023, worldwide · Source: EPO PATSTAT
- JFE STEEL JP 7,620
- NIPPON STEEL CORPORATION JP 5,769
- POSCO (POHANG IRON AND STEEL COMPANY) KR 4,523
- JFE STEEL 3,080
- NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,999
- ARCELORMITTAL LU 2,962
- CENTRAL SOUTH UNIVERSITY 2,431
- KOBE STEEL JP 2,100
- CHINESE ACADEMY OF SCIENCES 2,052
- MITSUBISHI MATERIALS CORPORATION JP 1,405