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IPC Main Group
F22B 33/00

Steam-generation plants, e.g. comprising steam boilers of different types in mutual association

Introduced: September 1968

Last revised: January 2006

Classification Context

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

Additional Content

Arrangements or dispositions of steam-generation plants in marine vessels

4 direct subcodes

Child Classifications

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  • F22B 33/12 Self-contained steam boilers, i.e. comprising as a unit the steam boiler, the combustion apparatus, the fuel storage, accessory machines, and equipment
  • F22B 33/18 Combinations of steam boilers with other apparatus

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