F27B 5/00 Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated (furnaces through which the charge is moved mechanically or in which the charge moves by gravity F27B9/00)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
CPC: Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated (furnaces through which the charge is moved mechanically or in which the charge moves by gravity F27B9/00)
Full Title
Full titles differ between systems:
Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated (furnaces through which the charge is moved mechanically or in which the charge moves by gravity F27B9/00)
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
Child Classifications
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Top Applicants
Top Applicants (IPC)
Class F27,2013–2023, worldwide · Source: EPO PATSTAT
- POSCO (POHANG IRON AND STEEL COMPANY) KR 885
- ZHONGYE CHANGTIAN INTERNATIONAL ENGINEERING COMPANY 670
- JFE STEEL 621
- JFE STEEL JP 492
- PAUL WURTH LU 418
- OUTOTEC (FINLAND) FI 346
- CHINA ENFI ENGINEERING CORPORATION 328
- THYSSEN KRUPP DE 310
- JINCHUAN GROUP 279
- NIPPON STEEL CORPORATION 262
Top Applicants (CPC)
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