F23M 9/003
In flue gas ducts
Official title: {in flue gas ducts}
F23M9/003 (In flue gas ducts) appears on 71 US grants and 52 published applications in this corpus.
Search patents in F23M- Granted patents
- 71
- Published applications
- 52
- Assignees
- 48
- Inventors
- 161
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 2 |
| 2007 | 0 | 4 |
| 2008 | 0 | 3 |
| 2009 | 4 | 2 |
| 2010 | 2 | 2 |
| 2011 | 1 | 3 |
| 2012 | 3 | 5 |
| 2013 | 1 | 1 |
| 2014 | 2 | 4 |
| 2015 | 3 | 0 |
| 2016 | 2 | 4 |
| 2017 | 1 | 0 |
| 2018 | 1 | 3 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 6 |
| 2022 | 4 | 2 |
| 2023 | 0 | 2 |
| 2024 | 2 | 3 |
| 2025 | 2 | 0 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Baffle and associated fryer heat exchange system and fryer11 Aug 2026US 12,702,254 B2Illinois Tool Works Inc.
- Windproof structure for flue outlet and gas water heater10 Mar 2026US 12,571,561 B1
- Non-return valve for a flow channel through which a flow of air flows24 Feb 2026US 12,560,242 B2Skoberne GmbH
- Radiant tube7 Oct 2025US 12,435,873 B2Jfe Steel Corporation
- Systems for water heater baffles on recreational vehicles8 Jul 2025US 12,352,439 B2Haier US Appliance Solutions, Inc.
- Fireplace Enclosure28 May 2026US 2026/0146736 A1
- Non-return valve for a flow channel through which a flow of air flows14 Nov 2024US 2024/0376986 A1Skoberne GmbH
- Systems for water heater baffles on recreational vehicles7 Mar 2024US 2024/0077203 A1Haier US Appliance Solutions, Inc.
- Baffle and associated fryer heat exchange system and fryer15 Feb 2024US 2024/0049913 A1Illinois Tool Works Inc.
- Flue Gas Baffle and Manufacturing Process Therefor22 Jun 2023US 2023/0194125 A1Rheem Australia Pty Limited
Most cited
By later US patents
- Method and apparatus for removing mercury from combustion exhaust gas33US 7,544,339 B2General Electric Company · 2009
- Water heater flue system21US 6,286,465 B1AOS Holding Company · 2001
- Vent damper20US 4,770,160 A1988
- Vent damper for gas water heater18US 5,239,947 A1993
- Heat exchanging insert and method for fabricating same16US 8,162,040 B2Spinworks, LLC · 2012