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DIFF Subgroup
F27B 3/06

with movable working chambers or hearths, e.g. tiltable

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces > with movable working chambers or hearths, e.g. tiltable

CPC:

Hearth-type furnaces, e.g. of reverberatory type (F27B9/00, F27B11/00, F27B13/00, F27B14/00, F27B15/00, F27B21/00 take precedence); Electric arc furnaces > with movable working chambers or hearths, e.g. tiltable

Of 1 combined children, 0 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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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