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CPC Subgroup
C22B 4/005

Full Title

Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys (obtaining iron or steel C21B, C21C)

Filing statistics

CPC C22B 4/005 belongs to the parent subclass C22B, which recorded 61,160 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,111 in 2013 to 8,089 in 2023 (+160%). The most active applicants in class C22 are JFE STEEL (7,620 applications), NIPPON STEEL CORPORATION (5,769 applications) and POSCO (POHANG IRON AND STEEL COMPANY) (4,523 applications).

Source: EPO PATSTAT, worldwide filings

Top Applicants

Top 10 applicants by patent filingsfor class C22, 2013–2023, worldwide · Source: EPO PATSTAT

  1. JFE STEEL JP 7,620
  2. NIPPON STEEL CORPORATION JP 5,769
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 4,523
  4. JFE STEEL 3,080
  5. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,999
  6. ARCELORMITTAL LU 2,962
  7. CENTRAL SOUTH UNIVERSITY 2,431
  8. KOBE STEEL JP 2,100
  9. CHINESE ACADEMY OF SCIENCES 2,052
  10. MITSUBISHI MATERIALS CORPORATION JP 1,405