F23K 5/20
Preheating devices
Official title: Preheating devices (in burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space F23D11/44)
F23K5/20 (Preheating devices) appears on 100 US grants and 81 published applications in this corpus.
Search patents in F23K- Granted patents
- 100
- Published applications
- 81
- Assignees
- 55
- Inventors
- 196
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 6 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 2 |
| 2004 | 1 | 2 |
| 2005 | 2 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 3 |
| 2008 | 2 | 4 |
| 2009 | 0 | 1 |
| 2010 | 1 | 6 |
| 2011 | 1 | 1 |
| 2012 | 1 | 2 |
| 2013 | 4 | 8 |
| 2014 | 1 | 3 |
| 2015 | 3 | 7 |
| 2016 | 5 | 2 |
| 2017 | 3 | 5 |
| 2018 | 6 | 2 |
| 2019 | 2 | 3 |
| 2020 | 3 | 8 |
| 2021 | 5 | 4 |
| 2022 | 3 | 3 |
| 2023 | 3 | 2 |
| 2024 | 6 | 6 |
| 2025 | 0 | 0 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Combustion of fuel22 Sep 2026US 12,742,417 B2ROLLS-ROYCE plc
- Engine apparatus and method for operation29 Oct 2024US 12,129,812 B2Hyliion Holdings Corp.
- Combustion of fuel24 Sep 2024US 12,098,675 B2ROLLS-ROYCE plc
- Portable liquid fuel vaporizer28 May 2024US 11,994,288 B2
- Constant density heat exchanger and system for energy conversion7 May 2024US 11,976,610 B2Hyliion Holdings Corp.
- Soot detection method for mild combustion system of tar-containing biomass gasified gas1 Oct 2026US 2026/0298793 A1Tianjin University
- Combustion system24 Sep 2026US 2026/0287176 A1IHI Corporation
- Combustion tool23 Apr 2026US 2026/0110430 A1Illinois Tool Works Inc.
- Combustion of fuel22 Jan 2026US 2026/0022660 A1ROLLS-ROYCE plc
- Method for controlling heating apparatus19 Dec 2024US 2024/0418366 A1Hephzibah Co., Ltd.
Most cited
By later US patents
- Fuel injection device having heater45US 6,561,168 B2Denso Corporation · 2003
- System for vaporization of liquid fuels for combustion and method of use40US 7,770,396 B2Combustion, LLC · 2010
- System for vaporization of liquid fuels for combustion and method of use36US 7,089,745 B2LPP Combustion, LLC · 2006
- Heavy fuel oil nozzle27US 4,141,505 A1979
- Fuel tank heating system21US 4,807,584 ADavco Manufacturing Corporation · 1989