F23M 9/006
Backflow diverters
Official title: {Backflow diverters}
F23M9/006 (Backflow diverters) appears on 29 US grants and 5 published applications in this corpus.
Search patents in F23M- Granted patents
- 29
- Published applications
- 5
- Assignees
- 13
- Inventors
- 38
- Latest grant
- 10 Mar 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 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 2 | 1 |
| 2025 | 0 | 0 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Passive and no-loss weather cap for protection of wind induced downdraft in sensitive exhaust system16 Apr 2024US 11,959,636 B2Uchicago Argonne, LLC
- Arrangement having two burners5 Mar 2024US 11,920,785 B2Truma Gerätetechnik GmbH & Co. KG
- Passive and no-loss weather cap for protection of wind induced downdraft in sensitive exhaust systems15 Mar 2022US 11,274,825 B2Uchicago Argonne, LLC
- Non-return valve for a flow channel through which a flow of air flows14 Nov 2024US 2024/0376986 A1Skoberne GmbH
- Passive and no-loss weather cap for protectionof wind induced downdraft in sensitive exhaust system26 May 2022US 2022/0163202 A1Uchicago Argonne, LLC
- Arrangement Having Two Burners7 Oct 2021US 2021/0310653 A1Truma Gerätetechnik GmbH & Co. KG
- Passive and no-loss weather cap for protection of wind induced downdraft in sensitive exhaust systems18 Jan 2018US 2018/0017251 A1Uchicago Argonne, LLC
- Ventilating hood for water heater6 Dec 2007US 2007/0281598 A1Grand Mate Co., Ltd.
Most cited
By later US patents
- Vent damper20US 4,770,160 A1988
- Vent damper for gas water heater18US 5,239,947 A1993
- Venting system for gas-fired heating plants13US 4,187,833 AKinetics, Inc. · 1980
- Detection of exhaust gas spillage from naturally aspirated gas furnaces and naturally aspirated gas hot water heaters12US 4,751,912 A1988
- Flue gas trap and diverter11US 4,215,814 A1980