CPC Subgroup
C22B 5/02 Dry methods
Full Title
General methods of reducing to metals > Dry methods
8 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- C22B 5/04 by aluminium, other metals or silicon
- C22B 5/06 by carbides or the like
- C22B 5/08 by sulfides; Roasting reaction methods
- C22B 5/10 by solid carbonaceous reducing agents
- C22B 5/12 by gases
- C22B 5/16 with volatilisation or condensation of the metal being produced
- C22B 5/18 Reducing step-by-step
- C22B 5/20 from metal carbonyls
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