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CPC Main Group Additional Only
F23C 2900/00

Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor

40 direct subcodes

Child Classifications

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  • F23C 2900/01001 Co-combustion of biomass with coal
  • F23C 2900/03001 Miniaturized combustion devices using fluid fuels
  • F23C 2900/03002 Combustion apparatus adapted for incorporating a fuel reforming device
  • F23C 2900/03003 Annular combustion chambers
  • F23C 2900/03004 Tubular combustion chambers with swirling fuel/air flow
  • F23C 2900/03005 Burners with an internal combustion chamber, e.g. for obtaining an increased heat release, a high speed jet flame or being used for starting the combustion
  • F23C 2900/03006 Reverse flow combustion chambers
  • F23C 2900/03007 Sealed combustion chambers with balanced flue
  • F23C 2900/03008 Spherical or bulb-shaped combustion chambers
  • F23C 2900/03009 Elongated tube-shaped combustion chambers
  • F23C 2900/05081 Disposition of burners relative to each other creating specific heat patterns
  • F23C 2900/05082 Disposition of radial jet burners in relation to an impingement surface, e.g. a heat transfer surface, to obtain flame re-attachment combustion
  • F23C 2900/06041 Staged supply of oxidant
  • F23C 2900/06042 Annular arrangement of burners in a furnace, e.g. in a gas turbine, operated in alternate lean-rich mode
  • F23C 2900/06043 Burner staging, i.e. radially stratified flame core burners
  • F23C 2900/07001 Air swirling vanes incorporating fuel injectors
  • F23C 2900/07002 Premix burners with air inlet slots obtained between offset curved wall surfaces, e.g. double cone burners
  • F23C 2900/07021 Details of lances
  • F23C 2900/07022 Delaying secondary air introduction into the flame by using a shield or gas curtain
  • F23C 2900/09001 Cooling flue gas before returning them to flame or combustion chamber

Top Applicants

Top 10 applicants by patent filingsfor class F23, 2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 2,581
  2. UNITED TECHNOLOGIES CORPORATION (UTC) US 1,180
  3. SIEMENS DE 1,157
  4. GE (GENERAL ELECTRIC COMPANY) 994
  5. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 769
  6. MITSUBISHI HEAVY INDUSTRIES JP 701
  7. MITSUBISHI HITACHI POWER SYSTEMS JP 695
  8. RAYTHEON TECHNOLOGIES CORPORATION US 587
  9. NINGBO FOTILE KITCHENWARE COMPANY 543
  10. GENERAL ELECTRIC TECHNOLOGY CH 490