Details, accessories or equipment specially adapted for furnaces of these types

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity > Details, accessories or equipment specially adapted for furnaces of these types

CPC:

Furnaces through which the charge is moved mechanically, e.g. of tunnel type (rotary-drum furnaces with means for agitating or moving the charge F27B7/14); Similar furnaces in which the charge moves by gravity > Details, accessories or equipment specially adapted for furnaces of these types

CPC subdivides this area 3x more granularly than IPC with 9 additional codes.

9 codes are CPC-only extensions.

Note: 6 CPC extensions are marked as secondary classification only.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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F27B 2009/305 2nd only +2 CPC CPC only CPC only
F27B 2009/3066 2nd only CPC only CPC only
F27B 2009/3072 2nd only CPC only CPC only
F27B 2009/3083 2nd only CPC only CPC only
F27B 2009/3088 2nd only CPC only CPC only
F27B 2009/3094 2nd only CPC only CPC only
F27B 9/3005 +4 CPC CPC only CPC only
F27B 9/3044 CPC only CPC only
F27B 9/3077 CPC only CPC only
F27B 9/32 Casings IPC+CPC Available in IPC and CPC
F27B 9/36 Arrangements of heating devices +7 CPC IPC+CPC Available in IPC and CPC
F27B 9/38 Arrangements of devices for charging +3 CPC IPC+CPC Available in IPC and CPC
F27B 9/39 Arrangements of devices for discharging since 1985 IPC+CPC Available in IPC and CPC
F27B 9/40 Arrangements of controlling or monitoring devices IPC+CPC Available in IPC and CPC

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