CPC Subgroup
C22C 38/18 containing chromium
Full Title
Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00) > containing chromium
11 direct subcodes
Child Classifications
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- C22C 38/20 with copper
- C22C 38/22 with molybdenum or tungsten
- C22C 38/24 with vanadium
- C22C 38/26 with niobium or tantalum
- C22C 38/28 with titanium or zirconium
- C22C 38/30 with cobalt
- C22C 38/32 with boron
- C22C 38/34 with more than 1.5% by weight of silicon
- C22C 38/36 with more than 1.7% by weight of carbon
- C22C 38/38 with more than 1.5% by weight of manganese
- C22C 38/40 with nickel
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