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C21B 15/00

Other processes for the manufacture of iron from iron compounds (general methods of reducing to metal C22B5/00; by electrolysis C25C1/06)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Other processes for the manufacture of iron from iron compounds

CPC: Other processes for the manufacture of iron from iron compounds (general methods of reducing to metal C22B5/00; by electrolysis C25C1/06)

Full Title

Full titles differ between systems:

IPC:

Other processes for the manufacture of iron from iron compounds

CPC:

Other processes for the manufacture of iron from iron compounds (general methods of reducing to metal C22B5/00; by electrolysis C25C1/06)

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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  • C21B 15/003 CPC only CPC only
  • C21B 15/006 CPC only CPC only
  • C21B 15/02 Metallothermic processes, e.g. thermit reduction IPC+CPC Available in IPC and CPC
  • C21B 15/04 from iron carbonyl IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class C21,2013–2023, worldwide · Source: EPO PATSTAT

  1. JFE STEEL JP 7,470
  2. POSCO (POHANG IRON AND STEEL COMPANY) KR 4,615
  3. JFE STEEL 4,538
  4. NIPPON STEEL CORPORATION JP 4,536
  5. ARCELORMITTAL LU 2,597
  6. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,241
  7. ANGANG STEEL COMPANY 2,126
  8. NSSMC (NIPPON STEEL & SUMITOMO METAL) 1,783
  9. BAOSHAN IRON & STEEL COMPANY 1,620
  10. HYUNDAI STEEL COMPANY KR 1,545

Top Applicants (CPC)

Class C21,2013–2023, worldwide · Source: EPO PATSTAT

  1. JFE STEEL JP 8,270
  2. NIPPON STEEL CORPORATION JP 5,222
  3. POSCO (POHANG IRON AND STEEL COMPANY) KR 4,824
  4. JFE STEEL 3,311
  5. ARCELORMITTAL LU 3,239
  6. NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,659
  7. HYUNDAI STEEL COMPANY KR 1,492
  8. ANGANG STEEL COMPANY 1,318
  9. BAOSHAN IRON & STEEL COMPANY 1,233
  10. KOBE STEEL JP 1,228