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CPC Subgroup Additional Only
C21B 2100/60

Process control or energy utilisation in the manufacture of iron or steel

Full Title

Handling of exhaust gases produced during the manufacture of iron or steel > Process control or energy utilisation in the manufacture of iron or steel

3 direct subcodes

Child Classifications

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  • C21B 2100/62 Energy conversion other than by heat exchange, e.g. by use of exhaust gas in energy production
  • C21B 2100/64 Controlling the physical properties of the gas, e.g. pressure or temperature
  • C21B 2100/66 Heat exchange

Top Applicants

Top 10 applicants by patent filingsfor 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