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PCE
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DIFF Subgroup
C22B 5/02

Dry methods

Introduced: September 1968

Title

Titles differ between systems:

IPC: Dry processes

CPC: Dry methods

Full Title

Full titles differ between systems:

IPC:

General processes of reducing to metals > Dry processes

CPC:

General methods of reducing to metals > Dry methods

IPC and CPC are identically structured here. All 8 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • C22B 5/04 by aluminium, other metals or silicon IPC+CPC Available in IPC and CPC
  • C22B 5/06 by carbides or the like IPC+CPC Available in IPC and CPC
  • C22B 5/08 by sulfides; Roasting reaction methods IPC+CPC Available in IPC and CPC
  • C22B 5/10 by solid carbonaceous reducing agents IPC+CPC Available in IPC and CPC
  • C22B 5/16 with volatilisation or condensation of the metal being produced IPC+CPC Available in IPC and CPC
  • C22B 5/18 Reducing step-by-step IPC+CPC Available in IPC and CPC
  • C22B 5/20 from metal carbonyls 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