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DIFF Main Group
F27B 21/00

Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction

Introduced: September 1968

Of 4 combined children, 3 exist in both systems.

1 codes exist only in IPC.

Child Classifications

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  • F27B 21/02 Sintering grates or tables IPC+CPC Available in IPC and CPC
  • F27B 21/04 Sintering pots or sintering pans IPC+CPC Available in IPC and CPC
  • F27B 21/06 Endless-strand sintering machines IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F27,2013–2023, worldwide · Source: EPO PATSTAT

  1. POSCO (POHANG IRON AND STEEL COMPANY) KR 885
  2. ZHONGYE CHANGTIAN INTERNATIONAL ENGINEERING COMPANY 670
  3. JFE STEEL 621
  4. JFE STEEL JP 492
  5. PAUL WURTH LU 418
  6. OUTOTEC (FINLAND) FI 346
  7. CHINA ENFI ENGINEERING CORPORATION 328
  8. THYSSEN KRUPP DE 310
  9. JINCHUAN GROUP 279
  10. NIPPON STEEL CORPORATION 262

Top Applicants (CPC)

Class F27,2013–2023, worldwide · Source: EPO PATSTAT

  1. POSCO (POHANG IRON AND STEEL COMPANY) KR 930
  2. JFE STEEL JP 771
  3. PAUL WURTH LU 518
  4. OUTOTEC (FINLAND) FI 436
  5. THYSSEN KRUPP DE 422
  6. REFRACTORY INTELLECTUAL PROPERTY & COMPANY AT 370
  7. THYSSENKRUPP INDUSTRIAL SOLUTIONS DE 341
  8. JFE STEEL 323
  9. PRIMETALS TECHNOLOGIES AUSTRIA AT 310
  10. ZHONGYE CHANGTIAN INTERNATIONAL ENGINEERING COMPANY 299