IPC Main Group
F22G 1/00 Steam superheating characterised by heating method
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- STEAM GENERATION
- Subclass:
- SUPERHEATING OF STEAM
6 direct subcodes
Child Classifications
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- F22G 1/02 with heat supply by hot flue gases from the furnace of the steam boiler
- F22G 1/06 with heat supply predominantly by radiation
- F22G 1/1 with provision for superheating by throttling
- F22G 1/12 by mixing steam with furnace gases or other combustion products
- F22G 1/14 using heat generated by chemical reactions
- F22G 1/16 by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil
Top Applicants
Top 10 applicants by patent filingsfor 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