CPC Main Group
F22G 1/00 Steam superheating characterised by heating method
7 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 1/10 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 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