IPC Main Group
F22G 5/00 Controlling superheat temperature
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- STEAM GENERATION
- Subclass:
- SUPERHEATING OF STEAM
Filing statistics
IPC F22G 5/00 belongs to the parent subclass F22G, which recorded 5,188 patent applications worldwide between 2013 and 2023. Annual filings grew from 269 in 2013 to 630 in 2023 (+134%), peaking at 668 applications in 2020. The most active applicants in class F22 are XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY (922 applications), MIURA COMPANY (416 applications) and HARBIN BOILER COMPANY (390 applications).
Source: EPO PATSTAT, worldwide filings
8 direct subcodes
Child Classifications
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- F22G 5/02 Applications of combustion-control devices, e.g. tangential-firing burners, tilting burners
- F22G 5/04 by regulating flue gas flow, e.g. by proportioning or diverting
- F22G 5/06 by recirculating flue gases
- F22G 5/1 by displacing superheater sections
- F22G 5/12 by attemperating the superheated steam, e.g. by injected water sprays
- F22G 5/16 by indirectly cooling or heating the superheated steam in auxiliary enclosed heat-exchanger
- F22G 5/18 by by-passing steam around superheater sections
- F22G 5/2 by combined controlling procedures
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