Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Main Group
F27B 7/00

Rotary-drum furnaces, i.e. horizontal or slightly inclined

Introduced: September 1968

Of 8 combined children, 7 exist in both systems.

1 codes are CPC-only extensions.

Note: 1 CPC extensions are marked as secondary classification only.

Child Classifications

Navigate with arrow keys, Enter to open

  • F27B 2007/005 2nd only CPC only CPC only
  • F27B 7/06 adapted for treating the charge in vacuum or special atmosphere IPC+CPC Available in IPC and CPC
  • F27B 7/08 externally heated IPC+CPC Available in IPC and CPC
  • F27B 7/10 internally heated, e.g. by means of passages in the wall IPC+CPC Available in IPC and CPC
  • F27B 7/12 tiltable 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