F23C 2900/00
Special features of, or arrangements for combustion apparatus using fluid fuels or
Official title: Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
F23C2900/00 (Special features of, or arrangements for combustion apparatus using fluid fuels or) appears on 1,584 US grants and 1,709 published applications in this corpus.
Search patents in F23C- Granted patents
- 1,584
- Published applications
- 1,709
- Assignees
- 764
- Inventors
- 3,548
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 13 | 0 |
| 1991 | 12 | 0 |
| 1992 | 11 | 0 |
| 1993 | 18 | 0 |
| 1994 | 20 | 0 |
| 1995 | 30 | 0 |
| 1996 | 33 | 0 |
| 1997 | 32 | 0 |
| 1998 | 45 | 0 |
| 1999 | 39 | 0 |
| 2000 | 39 | 0 |
| 2001 | 40 | 17 |
| 2002 | 35 | 39 |
| 2003 | 30 | 61 |
| 2004 | 54 | 80 |
| 2005 | 38 | 65 |
| 2006 | 39 | 65 |
| 2007 | 22 | 73 |
| 2008 | 32 | 60 |
| 2009 | 41 | 78 |
| 2010 | 33 | 105 |
| 2011 | 43 | 103 |
| 2012 | 43 | 80 |
| 2013 | 69 | 85 |
| 2014 | 87 | 89 |
| 2015 | 67 | 76 |
| 2016 | 67 | 70 |
| 2017 | 60 | 53 |
| 2018 | 46 | 50 |
| 2019 | 63 | 57 |
| 2020 | 58 | 50 |
| 2021 | 43 | 45 |
| 2022 | 39 | 74 |
| 2023 | 49 | 68 |
| 2024 | 49 | 65 |
| 2025 | 52 | 64 |
| 2026 | 31 | 37 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F23C 2900/9901Combustion process using hydrogen, hydrogen peroxide water or brown gas as fuelIndexing code240
- F23C 2900/07002Premix burners with air inlet slots obtained between offset curved wall surfacesIndexing code189
- F23C 2900/06041Staged supply of oxidantIndexing code179
- F23C 2900/07001Air swirling vanes incorporating fuel injectorsIndexing code135
- F23C 2900/99008Unmixed combustion, i.e. without direct mixing of oxygen gas and fuel, butIndexing code115
- F23C 2900/99001Cold flame combustion or flameless oxidation processesIndexing code114
- F23C 2900/09002Specific devices inducing or forcing flue gas recirculationIndexing code94
- F23C 2900/03005Burners with an internal combustion chamberIndexing code87
All 40 subgroupsShow fewer
- F23C 2900/03001Miniaturized combustion devices using fluid fuelsIndexing code65
- F23C 2900/07021Details of lancesIndexing code65
- F23C 2900/03002Combustion apparatus adapted for incorporating a fuel reforming deviceIndexing code60
- F23C 2900/13002Catalytic combustion followed by a homogeneous combustion phase or stabilizing a homogeneousIndexing code54
- F23C 2900/99006Arrangements for starting combustionIndexing code51
- F23C 2900/99005Combustion techniques using plasma gasIndexing code46
- F23C 2900/99011Combustion process using synthetic gas as a fuel, i.e. a mixture ofIndexing code34
- F23C 2900/06043Burner staging, i.e. radially stratified flame core burnersIndexing code33
- F23C 2900/99004Combustion process using petroleum coke or any other fuel with a veryIndexing code32
- F23C 2900/13001Details of catalytic combustorsIndexing code26
- F23C 2900/07022Delaying secondary air introduction into the flame by using a shield orIndexing code22
- F23C 2900/05081Disposition of burners relative to each other creating specific heat patternsIndexing code20
- F23C 2900/10001Use of special materials for the fluidized bedIndexing code17
- F23C 2900/03004Tubular combustion chambers with swirling fuel/air flowIndexing code16
- F23C 2900/03009Elongated tube-shaped combustion chambersIndexing code16
- F23C 2900/99009Combustion process using vegetable derived fuelsIndexing code16
- F23C 2900/01001Co-combustion of biomass with coalIndexing code15
- F23C 2900/03006Reverse flow combustion chambersIndexing code15
- F23C 2900/09001Cooling flue gas before returning them to flame or combustion chamberIndexing code12
- F23C 2900/99003Combustion techniques using laser or light beams as ignition, stabilization or combustionIndexing code11
- F23C 2900/10005Arrangement comprising two or more beds in separate enclosuresIndexing code7
- F23C 2900/10002Treatment devices for the fluidizing gasIndexing code6
- F23C 2900/10007Spouted fluidized bed combustorsIndexing code6
- F23C 2900/10008Special arrangements of return flow seal valve in fluidized bed combustorsIndexing code6
- F23C 2900/10006Pressurized fluidized bed combustorsIndexing code5
- F23C 2900/03008Spherical or bulb-shaped combustion chambersIndexing code4
- F23C 2900/10004Adding inert bed material to maintain proper fluidized bed inventoryIndexing code4
- F23C 2900/06042Annular arrangement of burners in a furnaceIndexing code3
- F23C 2900/03003Annular combustion chambersIndexing code2
- F23C 2900/05082Disposition of radial jet burners in relation to an impingement surfaceIndexing code2
- F23C 2900/10003Fluidized beds with expanding freeboard, i.e. cross-section increasing upwardlyIndexing code2
- F23C 2900/03007Sealed combustion chambers with balanced flueIndexing code0
Recent patents
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- Methods and systems for mixing fluids22 Sep 2026US 12,742,545 B2Ekona Power Inc.
- Thermal processing apparatus with a heating device operated with hydrogen, sustainable cremation, free of CO215 Sep 2026US 12,736,220 B2Albert Hesse Familienstiftung
- Burner for fuel combustion and combustion method therefor1 Sep 2026US 12,723,753 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process burner with distal flame holder25 Aug 2026US 12,716,582 B2
- Device and method for injecting a hydrogen-air mixture for a turbine engine burner8 Oct 2026US 2026/0309329 A1Safran
- Compositions, methods, and apparatuses for catalytic combustion1 Oct 2026US 2026/0295564 A1Star Scientific Limited
- Method for performing mechanical work, arrangement for performing mechanical work, and method for converting mechanical energy into electrical energy24 Sep 2026US 2026/0287177 A1
- Hydrogen gas burner10 Sep 2026US 2026/0266459 A1Amf Den Boer B.V.
- Nozzle arrangement for a burner and burner comprising a nozzle arrangement of this type10 Sep 2026US 2026/0266460 A1Benninghoven Zweigniederlassung Der Wirtgen Mineral Technologies GmbH
Most cited
By later US patents
- Heat injection process368US 5,255,742 AShell Oil Company · 1993
- Flameless combustor346US 5,899,269 AShell Oil Company · 1999
- Oil recovery process345US 5,297,626 AShell Oil Company · 1994
- Oil recovery process340US 5,392,854 AShell Oil Company · 1995
- Flameless combustor332US 6,019,172 AShell Oil Company · 2000