CPC Main Group
F22G 1/00 Steam superheating characterised by heating method
Filing statistics
CPC F22G 1/00 belongs to the parent subclass F22G, which recorded 2,907 patent applications worldwide between 2013 and 2023. Annual filings grew from 172 in 2013 to 308 in 2023 (+79%), peaking at 370 applications in 2016. The most active applicants in class F22 are XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY (544 applications), SIEMENS (306 applications) and PHILIP MORRIS PRODUCTS (258 applications).
Source: EPO PATSTAT, worldwide filings
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