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IPC Main Group
C22F 3/00

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

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
Subclass:
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS

Filing statistics

IPC C22F 3/00 belongs to the parent subclass C22F, which recorded 48,023 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,970 in 2013 to 5,407 in 2023 (+82%). The most active applicants in class C22 are JFE STEEL (7,152 applications), NIPPON STEEL CORPORATION (5,416 applications) and POSCO (POHANG IRON AND STEEL COMPANY) (4,530 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 7,152
  2. NIPPON STEEL CORPORATION JP 5,416
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 4,530
  4. JFE STEEL 3,986
  5. CENTRAL SOUTH UNIVERSITY 3,086
  6. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,843
  7. CHINESE ACADEMY OF SCIENCES 2,702
  8. ARCELORMITTAL LU 2,124
  9. NSSMC (NIPPON STEEL & SUMITOMO METAL) 2,075
  10. KOBE STEEL JP 1,891