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CPC Main Group
C22F 3/00

Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons

Filing statistics

CPC C22F 3/00 belongs to the parent subclass C22F, which recorded 44,798 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,326 in 2013 to 4,450 in 2023 (+91%), peaking at 5,042 applications in 2018. 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

1 direct subcode

Child Classifications

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  • C22F 3/02 by solidifying a melt controlled by supersonic waves or electric or magnetic fields

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