F22G SUPERHEATING OF STEAM
Introduced: September 1968
Description
F22G covers apparatus and methods for raising steam temperature above saturation point to improve thermodynamic efficiency in steam power systems. This includes superheater designs using heat exchange surfaces, control mechanisms for superheat temperature regulation, and integration with boiler units. The classification encompasses both convective and radiant heat transfer superheaters, as well as systems for attemperation (cooling) of excessively superheated steam. Adjacent classes F22B (steam boiler construction) and F22D (steam generation plant control) address boiler design and plant-level regulation respectively.
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
Child Classifications
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- F22G 1/00 Steam superheating characterised by heating method +1 CPC IPC+CPC Available in IPC and CPC
- F22G 3/00 Steam superheaters characterised by constructional features; Details or component parts thereof +8 CPC IPC+CPC Available in IPC and CPC
- F22G 7/00 Steam superheaters characterised by location, arrangement, or disposition +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F22,2013–2023, worldwide · Source: EPO PATSTAT
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 922
- MIURA COMPANY 416
- HARBIN BOILER COMPANY 390
- MITSUBISHI HITACHI POWER SYSTEMS 303
- XIAN JIAOTONG UNIVERSITY 287
- SGCC(STATE GRID CORPORATION OF CHINA) 257
- HUADIAN ELECTRIC POWER RESEARCH INSTITUTE 253
- SIEMENS DE 247
- MIDEA 243
- NORTH CHINA ELECTRIC POWER UNIVERSITY 223
Top Applicants (CPC)
Class F22,2013–2023, worldwide · Source: EPO PATSTAT
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 544
- SIEMENS DE 306
- PHILIP MORRIS PRODUCTS CH 258
- GENERAL ELECTRIC TECHNOLOGY CH 254
- MITSUBISHI HITACHI POWER SYSTEMS JP 235
- XIAN JIAOTONG UNIVERSITY 214
- MITSUBISHI HEAVY INDUSTRIES JP 195
- MITSUBISHI HITACHI POWER SYSTEMS 169
- HARBIN BOILER COMPANY 166
- VALMET TECHNOLOGIES FI 155