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IPC Subgroup
F22G 5/04

by regulating flue gas flow, e.g. by proportioning or diverting

Introduced: September 1968

Last revised: January 2006

Full Title

Controlling superheat temperature > by regulating flue gas flow, e.g. by proportioning or diverting

Classification Context

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

Filing statistics

IPC F22G 5/04 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

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