F22B 37/02 applicable to more than one kind or type of steam boiler
Introduced: September 1968
Last revised: January 2006
Full Title
Component parts or details of steam boilers > applicable to more than one kind or type of steam boiler
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- STEAM GENERATION
- Subclass:
- METHODS OF STEAM GENERATION; STEAM BOILERS
Filing statistics
IPC F22B 37/02 belongs to the parent subclass F22B, which recorded 46,730 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,854 in 2013 to 4,965 in 2023 (+74%), peaking at 5,724 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
14 direct subcodes
Child Classifications
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- F22B 37/04 and characterised by material, e.g. use of special steel alloy
- F22B 37/06 Flue or fire tubes; Accessories therefor, e.g. fire-tube inserts
- F22B 37/1 Water tubes; Accessories therefor
- F22B 37/22 Drums; Headers; Accessories therefor
- F22B 37/24 Supporting, suspending or setting arrangements, e.g. heat shielding
- F22B 37/26 Steam-separating arrangements
- F22B 37/34 Adaptations of boilers for promoting water circulation
- F22B 37/36 Arrangements for sheathing or casing boilers
- F22B 37/38 Determining or indicating operating conditions in steam boilers, e.g. monitoring direction or rate of water flow through water tubes
- F22B 37/4 Arrangements of partition walls in flues of steam boilers, e.g. built-up from baffles
- F22B 37/42 Applications, arrangements or dispositions of alarm or automatic safety devices
- F22B 37/48 Devices or arrangements for removing water, minerals or sludge from boilers
- F22B 37/56 Boiler-cleaning control devices, e.g. for ascertaining proper duration of boiler blow-down
- F22B 37/58 Removing tubes from headers or drums; Extracting tools
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