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PCE
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CPC Subgroup
C22F 1/04

of aluminium or alloys based thereon

Full Title

Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working (apparatus for mechanical working of metal B21, B23, B24) > of aluminium or alloys based thereon

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 7,620
  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