F24H 9/0084
Combustion air preheating
Official title: {Combustion air preheating}
F24H9/0084 (Combustion air preheating) appears on 47 US grants and 56 published applications in this corpus.
Search patents in F24H- Granted patents
- 47
- Published applications
- 56
- Assignees
- 38
- Inventors
- 98
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 3 |
| 2009 | 0 | 2 |
| 2010 | 0 | 3 |
| 2011 | 2 | 2 |
| 2012 | 1 | 1 |
| 2013 | 0 | 6 |
| 2014 | 1 | 0 |
| 2015 | 1 | 8 |
| 2016 | 1 | 2 |
| 2017 | 4 | 1 |
| 2018 | 1 | 2 |
| 2019 | 2 | 5 |
| 2020 | 5 | 6 |
| 2021 | 3 | 5 |
| 2022 | 4 | 2 |
| 2023 | 2 | 3 |
| 2024 | 2 | 2 |
| 2025 | 5 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Burner assembly for air preheating combustion12 May 2026US 12,624,831 B2
- Flue gas energy recovery system and method25 Nov 2025US 12,480,720 B2Carbon Cap Inc.
- Combustion chamber and gas apparatus14 Oct 2025US 12,442,531 B2Midea Group Co., Ltd.
- Heating device with improved efficiency2 Sep 2025US 12,405,010 B2Suter Entfeuchtungstechnik AG
- Gas control system12 Aug 2025US 12,385,668 B2Marlin Gas Services, LLC
- Burner assembly for air preheating combustion19 Feb 2026US 2026/0049713 A1
- Rotary apparatus for heating fluids and for recycling heated fluids, related method and uses27 Feb 2025US 2025/0067471 A1Coolbrook Oy
- Gas control system24 Oct 2024US 2024/0353147 A1Marlin Gas Services, LLC
- Heating unit with bottom mounted blower unit4 Apr 2024US 2024/0110726 A1Nilfisk A/S
- Gas control system27 Jul 2023US 2023/0235921 A1Marlin Gas Services, LLC
Most cited
By later US patents
- Heating boiler having a vertical burner tube21US 4,679,528 ARemeha Fabrieken B.V. · 1987
- Water heating apparatus18US 5,311,843 AWeben-Jarco, Inc. · 1994
- Boilers11US 4,909,190 AStelrad Group Limited · 1990
- Method for exchanging heat and a device for carrying out said method9US 4,287,938 A1981
- Gas apparatus for producing hot water7US 4,557,220 ARuhrgas Aktiengesellschaft · 1985