F23K
Feeding fuel to combustion apparatus
Official title: FEEDING FUEL TO COMBUSTION APPARATUS (fuel feeders specially adapted for fluidised bed combustion apparatus F23C10/22)
F23K (Feeding fuel to combustion apparatus) appears on 2,221 US grants and 2,013 published applications in this corpus.
Search patents in F23K- Granted patents
- 2,221
- Published applications
- 2,013
- Assignees
- 1,133
- Inventors
- 4,606
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 16 | 0 |
| 1978 | 17 | 0 |
| 1979 | 22 | 0 |
| 1980 | 34 | 0 |
| 1981 | 49 | 0 |
| 1982 | 38 | 0 |
| 1983 | 47 | 0 |
| 1984 | 66 | 0 |
| 1985 | 49 | 0 |
| 1986 | 46 | 0 |
| 1987 | 35 | 0 |
| 1988 | 34 | 0 |
| 1989 | 25 | 0 |
| 1990 | 22 | 0 |
| 1991 | 25 | 0 |
| 1992 | 25 | 0 |
| 1993 | 30 | 0 |
| 1994 | 35 | 0 |
| 1995 | 19 | 0 |
| 1996 | 21 | 0 |
| 1997 | 28 | 0 |
| 1998 | 27 | 0 |
| 1999 | 26 | 0 |
| 2000 | 40 | 0 |
| 2001 | 36 | 11 |
| 2002 | 32 | 28 |
| 2003 | 26 | 40 |
| 2004 | 32 | 54 |
| 2005 | 34 | 56 |
| 2006 | 27 | 51 |
| 2007 | 20 | 74 |
| 2008 | 28 | 66 |
| 2009 | 26 | 62 |
| 2010 | 36 | 110 |
| 2011 | 45 | 109 |
| 2012 | 58 | 105 |
| 2013 | 84 | 123 |
| 2014 | 67 | 122 |
| 2015 | 89 | 93 |
| 2016 | 75 | 112 |
| 2017 | 94 | 81 |
| 2018 | 63 | 97 |
| 2019 | 77 | 76 |
| 2020 | 88 | 99 |
| 2021 | 87 | 81 |
| 2022 | 65 | 100 |
| 2023 | 74 | 72 |
| 2024 | 74 | 73 |
| 2025 | 47 | 69 |
| 2026 | 45 | 49 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F23K 5/00Feeding or distributing other fuel to combustion apparatus1,011
- F23K 3/00Feeding or distributing of lump or pulverulent fuel to combustion apparatus527
- F23K 1/00Preparation of lump or pulverulent fuel in readiness for delivery to combustion432
- F23K 2900/00Special features of, or arrangements for fuel suppliesIndexing code368
- F23K 2201/00Pretreatment of solid fuelIndexing code320
- F23K 2203/00Feeding arrangementsIndexing code198
- F23K 2300/00Pretreatment and supply of liquid fuelIndexing code174
- F23K 2400/00Pretreatment and supply of gaseous fuelIndexing code133
All 9 main groupsShow fewer
Recent patents
- Oxygen detection system and reflow furnace using the same29 Sep 2026US 12,746,614 B2Illinois Tool Works Inc.
- Systems and methods for heating of dispersed metallic particles29 Sep 2026US 12,747,858 B2Oqab Dietrich Induction Inc.
- Combustion of fuel22 Sep 2026US 12,742,417 B2ROLLS-ROYCE plc
- Space efficient gas valves for grills15 Sep 2026US 12,733,772 B2
- Burner for liquid fuel and method for operating such burner15 Sep 2026US 12,736,216 B2Aduro A/S
- Gas turbine engine fuel system8 Oct 2026US 2026/0309083 A1General Electric Company
- Apparatus for feeding solid fuel feedstock into a furnace8 Oct 2026US 2026/0309324 A1British American Tobacco (Investments) Limited
- Soot detection method for mild combustion system of tar-containing biomass gasified gas1 Oct 2026US 2026/0298793 A1Tianjin University
- Valve Assembly for a Gas Burner24 Sep 2026US 2026/0287172 A1Copreci, S. Coop.
- Combustion system24 Sep 2026US 2026/0287176 A1IHI Corporation
Most cited
By later US patents
- Membrane based fuel deoxygenator394US 6,315,815 B1United Technologies Corporation · 2001
- Burner furnace for solid fuels and a method of burning different kinds of solid fuel in this furnace357US 4,250,817 AThermo Murg K.G. · 1981
- Methods and apparatus for a combustion turbine fuel recirculation system and nitrogen purge system173US 7,721,521 B2General Electric Company · 2010
- Methods and apparatus for a combustion turbine nitrogen purge system171US 7,730,711 B2General Electric Company · 2010
- Combustion method and apparatus for producing a carbon dioxide end product164US 6,202,574 B1ABB Alstom Power Inc. · 2001