CPC Subgroup
F27B 3/10 Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
Full Title
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 > Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
9 direct subcodes
Child Classifications
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- F27B 3/12 Working chambers or casings; Supports therefor
- F27B 3/18 Arrangements of devices for charging
- F27B 3/19 Arrangements of devices for discharging
- F27B 3/20 Arrangements of heating devices
- F27B 3/22 Arrangements of air or gas supply devices
- F27B 3/24 Cooling arrangements
- F27B 3/26 Arrangements of heat-exchange apparatus
- F27B 3/28 Arrangement of controlling, monitoring, alarm or the like devices
Top Applicants
Top 10 applicants by patent filingsfor class F27, 2013–2023, worldwide · Source: EPO PATSTAT
- POSCO (POHANG IRON AND STEEL COMPANY) KR 930
- JFE STEEL JP 771
- PAUL WURTH LU 518
- OUTOTEC (FINLAND) FI 436
- THYSSEN KRUPP DE 422
- REFRACTORY INTELLECTUAL PROPERTY & COMPANY AT 370
- THYSSENKRUPP INDUSTRIAL SOLUTIONS DE 341
- JFE STEEL 323
- PRIMETALS TECHNOLOGIES AUSTRIA AT 310
- ZHONGYE CHANGTIAN INTERNATIONAL ENGINEERING COMPANY 299