DIFF Main Group
F23M 5/00 Casings; Linings; Walls
Introduced: September 1968
Additional Content IPC
Preventing corrosion in apparatus specially adapted for combustion of waste or low-grade fuels, e.g. incinerators Film cooling arrangements for gas turbine combustion chambers Construction of tiles or bracing means therefor for domestic masonry stoves for solid fuels Casings for domestic stoves or ranges Casings for water heaters, e.g. heating boilers Casings, linings, wall or roofs of furnaces, kilns, ovens or retorts ,
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
Child Classifications
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- F23M 5/02 characterised by the shape of the bricks or blocks used +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F23,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,124
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 1,369
- NINGBO FOTILE KITCHENWARE COMPANY 1,363
- SIEMENS DE 997
- UNITED TECHNOLOGIES CORPORATION (UTC) US 937
- GE (GENERAL ELECTRIC COMPANY) 898
- VATTI 815
- CHINESE ACADEMY OF SCIENCES 719
- RINNAI COMPANY 708
- MITSUBISHI HITACHI POWER SYSTEMS 670
Top Applicants (CPC)
Class F23,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,581
- UNITED TECHNOLOGIES CORPORATION (UTC) US 1,180
- SIEMENS DE 1,157
- GE (GENERAL ELECTRIC COMPANY) 994
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 769
- MITSUBISHI HEAVY INDUSTRIES JP 701
- MITSUBISHI HITACHI POWER SYSTEMS JP 695
- RAYTHEON TECHNOLOGIES CORPORATION US 587
- NINGBO FOTILE KITCHENWARE COMPANY 543
- GENERAL ELECTRIC TECHNOLOGY CH 490