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PCE
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DIFF Subgroup
C22F 1/04

of aluminium or alloys based thereon

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

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

CPC:

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

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

IPC defines codes here since 1985.

Child Classifications

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  • C22F 1/043 of alloys with silicon as the next major constituent since 1985 IPC+CPC Available in IPC and CPC
  • C22F 1/047 of alloys with magnesium as the next major constituent since 1985 IPC+CPC Available in IPC and CPC
  • C22F 1/05 of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions since 1985 IPC+CPC Available in IPC and CPC
  • C22F 1/053 of alloys with zinc as the next major constituent since 1985 IPC+CPC Available in IPC and CPC
  • C22F 1/057 of alloys with copper as the next major constituent since 1985 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

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