F27 FURNACES; KILNS; OVENS; RETORTS
Description
F27 encompasses equipment designed for high-temperature processing of materials through controlled heating in enclosed chambers, including furnaces, kilns, ovens, and retorts used across metallurgical, ceramic, chemical, and thermal processing industries. The classification covers structural designs, heating mechanisms, temperature control systems, and operational configurations for batch and continuous heating operations. It addresses both the physical construction of heating vessels and the engineering of heat distribution, insulation, and material handling within such apparatus. Related thermal processing equipment using different technological approaches or serving specialized purposes may be classified in adjacent sections of mechanical engineering or chemical engineering.
Title
Titles differ between systems:
IPC: FURNACES; KILNS, OVENS OR RETORTS
CPC: FURNACES; KILNS; OVENS; RETORTS
Full Title
Full titles differ between systems:
FURNACES; KILNS, OVENS OR RETORTS
FURNACES; KILNS; OVENS; RETORTS
Of 3 combined children, 2 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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- F27B FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS heading IPC+CPC Available in IPC and CPC
- F27D DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE heading +1 CPC IPC+CPC Available in IPC and CPC
- F27M INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS heading +3 CPC CPC only CPC only
Top Applicants
Top Applicants (IPC)
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)
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