F24H 15/112
Preventing or detecting blocked flues
F24H15/112 (Preventing or detecting blocked flues) appears on 28 US grants and 24 published applications in this corpus.
Search patents in F24H- Granted patents
- 28
- Published applications
- 24
- Assignees
- 20
- Inventors
- 77
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 2 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 3 |
| 2018 | 1 | 3 |
| 2019 | 5 | 2 |
| 2020 | 2 | 4 |
| 2021 | 1 | 2 |
| 2022 | 2 | 2 |
| 2023 | 2 | 0 |
| 2024 | 1 | 2 |
| 2025 | 2 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air pressure detection device, combustor, gas water heater, method and apparatus for controlling gas water heater, and computer-readable storage medium7 Apr 2026US 12,595,933 B2Midea Group Co., Ltd.
- Systems and methods for operating a furnace system15 Jul 2025US 12,359,846 B2Johnson Controls Light Commercial IP GmbH
- Feedback warning system using inducer pulse width modulation signal13 May 2025US 12,298,038 B2Johnson Controls Light Commercial IP GmbH
- Dynamically adjusting heater14 May 2024US 11,982,469 B2Williams Furnace Company
- Feedback warning system using inducer pulse width modulation signal10 Oct 2023US 11,781,785 B2Johnson Controls Tyco IP Holdings LLP
- Baffle device for flue and gas water heating device1 May 2025US 2025/0137688 A1
- Air pressure detection device, combustor, gas water heater, method and apparatus for controlling gas water heater, and computer-readable storage medium14 Mar 2024US 2024/0085058 A1Midea Group Co., Ltd.
- Feedback warning system using inducer pulse width modulation signal1 Feb 2024US 2024/0035705 A1Johnson Controls Tyco IP Holdings LLP
- Systems and methods for operating a furnace system5 May 2022US 2022/0136736 A1Johnson Controls Tyco IP Holdings LLP
- Dynamically Adjusting Heater24 Mar 2022US 2022/0090823 A1Williams Furnace Company
Most cited
By later US patents
- Integrated appliance control system186US 6,059,195 ATridelta Industries, Inc. · 2000
- Control system for a water heater150US 5,797,358 AAOS Holding Company · 1998
- Power vent water heater with electronic control system60US 6,053,130 AAmerican Water Heater Company · 2000
- Integrated appliance control system36US 6,129,284 ATridelta Industries, Inc. · 2000
- Vent overpressurization detection system for a fuel-fired, induced draft furnace26US 4,951,651 ARheem Manufacturing Company · 1990