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