F23D 11/44
Preheating devices
Official title: Preheating devices; Vaporising devices
F23D11/44 (Preheating devices) appears on 271 US grants and 186 published applications in this corpus.
Search patents in F23D- Granted patents
- 271
- Published applications
- 186
- Assignees
- 172
- Inventors
- 532
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 5 | 0 |
| 1983 | 14 | 0 |
| 1984 | 7 | 0 |
| 1985 | 10 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 9 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 10 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 2 | 3 |
| 2002 | 5 | 4 |
| 2003 | 4 | 6 |
| 2004 | 4 | 11 |
| 2005 | 8 | 9 |
| 2006 | 2 | 8 |
| 2007 | 2 | 8 |
| 2008 | 3 | 9 |
| 2009 | 2 | 10 |
| 2010 | 4 | 9 |
| 2011 | 7 | 8 |
| 2012 | 7 | 4 |
| 2013 | 3 | 9 |
| 2014 | 7 | 11 |
| 2015 | 7 | 21 |
| 2016 | 16 | 9 |
| 2017 | 8 | 9 |
| 2018 | 11 | 7 |
| 2019 | 9 | 13 |
| 2020 | 11 | 7 |
| 2021 | 8 | 3 |
| 2022 | 7 | 2 |
| 2023 | 2 | 2 |
| 2024 | 4 | 0 |
| 2025 | 0 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Burner system and method for providing thermal energy12 May 2026US 12,624,830 B2Siqens GmbH
- Catalytic heating systems comprising dual-mode liquid fuel vaporizers and methods of operating thereof6 Aug 2024US 12,055,289 B2Proof Energy Inc.
- Torch and hood assembly comprising a chimney and double plated enclosure, provision for atomizing fuel for easy combustion, and provision for auto-ignition of fuel14 May 2024US 11,982,443 B1Agricultural Flamming Innovations, LLC
- Brass burner system and method27 Feb 2024US 11,913,641 B1BSG Holdings, LLC
- Control method for a catalytic combustion apparatus and a catalytic combustion system13 Feb 2024US 11,898,750 B2Nissan Motor Co., Ltd.
- Fireplace Flame-Extinguishing Method and Fireplace8 Jan 2026US 2026/0009542 A1Ningbo Richen Electrical Appliance Co., Ltd
- Gas preheating torch23 Jan 2025US 2025/0027646 A1Mit
- Gasification device for gasification combustion fireplace9 Jan 2025US 2025/0012441 A1
- Fireplace for gasifying and burning fuel9 Jan 2025US 2025/0012451 A1
- Catalytic heating systems comprising dual-mode liquid fuel vaporizers and methods of operating thereof4 May 2023US 2023/0132692 A1Proof Energy Inc.
Most cited
By later US patents
- Downhole steam generator with improved preheating, combustion and protection features205US 4,385,661 AThe United States of America as represented by the United States Department of Energy · 1983
- Staged prevaporizer-premixer115US 6,174,160 B1University of Washington · 2001
- Injector for turbine engines97US 5,657,631 AB.B.A. Research & Development, Inc. · 1997
- Method and apparatus for generating power by combustion of vaporized fuel87US 7,313,916 B2Philip Morris USA Inc. · 2008
- Apparatus for the premixed gas phase combustion of liquid fuels58US 4,262,482 A1981