CPC Main Group
F27D 1/00 Casings; Linings; Walls; Roofs
12 direct subcodes
Child Classifications
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- F27D 1/02 Crowns; Roofs
- F27D 1/04 characterised by the form of the bricks or blocks used
- F27D 1/10 Monolithic linings; Supports therefor
- F27D 1/12 incorporating cooling arrangements
- F27D 1/14 Supports for linings (supports for monolithic linings F27D1/10)
- F27D 1/16 Making or repairing linings
- F27D 1/18 Door frames; Doors, lids or removable covers
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