IPC Subgroup
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
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