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IPC Subgroup
C22F 1/04

of aluminium or alloys based thereon

Introduced: September 1968

Last revised: January 2006

Full Title

Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working > of aluminium or alloys based thereon

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

5 direct subcodes

Child Classifications

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  • C22F 1/043 of alloys with silicon as the next major constituent
  • C22F 1/047 of alloys with magnesium as the next major constituent
  • C22F 1/05 of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
  • C22F 1/053 of alloys with zinc as the next major constituent
  • C22F 1/057 of alloys with copper as the next major constituent

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