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IPC Subgroup
F22B 37/42

Applications, arrangements or dispositions of alarm or automatic safety devices

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 > Applications, arrangements or dispositions of alarm or automatic safety devices

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
STEAM GENERATION
Subclass:
METHODS OF STEAM GENERATION; STEAM BOILERS

Filing statistics

IPC F22B 37/42 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

Additional Content

Safety devices for feed-water heaters

3 direct subcodes

Child Classifications

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  • F22B 37/44 of safety valves
  • F22B 37/46 responsive to low or high water level, e.g. for checking, suppressing or extinguishing combustion in boilers
  • F22B 37/47 responsive to abnormal temperature, e.g. actuated by fusible plugs

Top Applicants

Top 10 applicants by patent filingsfor class F22, 2013–2023, worldwide · Source: EPO PATSTAT

  1. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 922
  2. MIURA COMPANY 416
  3. HARBIN BOILER COMPANY 390
  4. MITSUBISHI HITACHI POWER SYSTEMS 303
  5. XIAN JIAOTONG UNIVERSITY 287
  6. SGCC(STATE GRID CORPORATION OF CHINA) 257
  7. HUADIAN ELECTRIC POWER RESEARCH INSTITUTE 253
  8. SIEMENS DE 247
  9. MIDEA 243
  10. NORTH CHINA ELECTRIC POWER UNIVERSITY 223