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CPC Subgroup
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

Full Title

Steam-generation plants, e.g. comprising steam boilers of different types in mutual association > Self-contained steam boilers, i.e. comprising as a unit the steam boiler, the combustion apparatus, the fuel storage, accessory machines and equipment

Top Applicants

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

  1. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 544
  2. SIEMENS DE 306
  3. PHILIP MORRIS PRODUCTS CH 258
  4. GENERAL ELECTRIC TECHNOLOGY CH 254
  5. MITSUBISHI HITACHI POWER SYSTEMS JP 235
  6. XIAN JIAOTONG UNIVERSITY 214
  7. MITSUBISHI HEAVY INDUSTRIES JP 195
  8. MITSUBISHI HITACHI POWER SYSTEMS 169
  9. HARBIN BOILER COMPANY 166
  10. VALMET TECHNOLOGIES FI 155