F23C 99/00
Subject-matter not provided for in other groups of this subclass
F23C99/00 (Subject-matter not provided for in other groups of this subclass) appears on 494 US grants and 558 published applications in this corpus.
Search patents in F23C- Granted patents
- 494
- Published applications
- 558
- Assignees
- 298
- Inventors
- 1,014
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 8 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 7 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 8 | 0 |
| 1993 | 6 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 11 | 0 |
| 1997 | 7 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 2 |
| 2002 | 6 | 8 |
| 2003 | 2 | 8 |
| 2004 | 5 | 14 |
| 2005 | 9 | 17 |
| 2006 | 9 | 20 |
| 2007 | 6 | 9 |
| 2008 | 4 | 12 |
| 2009 | 5 | 20 |
| 2010 | 13 | 20 |
| 2011 | 5 | 36 |
| 2012 | 9 | 25 |
| 2013 | 15 | 46 |
| 2014 | 28 | 61 |
| 2015 | 21 | 46 |
| 2016 | 45 | 44 |
| 2017 | 41 | 36 |
| 2018 | 32 | 32 |
| 2019 | 29 | 28 |
| 2020 | 32 | 21 |
| 2021 | 16 | 10 |
| 2022 | 11 | 10 |
| 2023 | 10 | 5 |
| 2024 | 11 | 9 |
| 2025 | 4 | 13 |
| 2026 | 6 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F23C 99/001Applying electric means or magnetism to combustion171
- F23C 99/006Flameless combustion stabilised within a bed of porous heat-resistant material85
- F23C 99/003Combustion process using sound or vibrations30
- F23C 99/005Suspension-type burning, i.e. fuel particles carried along with a gas flow while13
- F23C 99/008Combustion methods wherein flame cooling techniques other than fuel or air staging13
Recent patents
- CLC method and plant with recovery of gaseous oxygen produced by an oxygen carrier29 Sep 2026US 12,747,859 B2Ifp Energies Nouvelles
- Driving method for the synergistic combustion of fossil fuels and nuclear-chemical energy1 Sep 2026US 12,723,750 B2Linghangguochuang (Beijing) Technology Group Co., Ltd
- Push/pull furnace and methods related thereto14 Jul 2026US 12,680,693 B2Trane International Inc.
- Combustors and methods of mitigating thermoacoustic instabilities in a gas flow14 Apr 2026US 12,601,493 B2ROLLS-ROYCE plc
- Apparatus and methods for efficient conversion of heat to electricity via emission of characteristic radiation14 Apr 2026US 12,603,600 B2LightCell Inc.
- Method for performing mechanical work, arrangement for performing mechanical work, and method for converting mechanical energy into electrical energy24 Sep 2026US 2026/0287177 A1
- Wave Energy Systems3 Sep 2026US 2026/0262141 A1Foret Plasma Labs, LLC
- Pulse flow reactors and systems or uses thereof27 Aug 2026US 2026/0249124 A1ThermoChem Recovery International, Inc.
- Dual-speed burning torch with fuel gas and warm nuclear fusion combined burning16 Apr 2026US 2026/0104164 A1Leading Guochuang (Beijing) Technology Group Co., LTD
- Pulverized coal and warm nuclear fusion combined glowing flame burner19 Mar 2026US 2026/0081041 A1Leading Guochuang (Beijing) Technology Group Co., LTD
Most cited
By later US patents
- Trifluid reactor177US 7,523,603 B2Vast Power Portfolio, LLC · 2009
- Thermodynamic cycles using thermal diluent158US 7,416,137 B2Vast Power Systems, Inc. · 2008
- Rotary engine expansion chamber apparatus and method of operation therefor140US 8,523,547 B22013
- Electrohydrodynamic (EHD) control of fuel injection in gas turbines137US 4,439,980 AThe United States of America as represented by the Secretary of the Navy · 1984
- Pressurized wet combustion at increased temperature108US 5,050,375 ADipac Associates · 1991