F23J 2211/20
Common flues for several combustion devices
F23J2211/20 (Common flues for several combustion devices) appears on 17 US grants and 14 published applications in this corpus.
Search patents in F23J- Granted patents
- 17
- Published applications
- 14
- Assignees
- 13
- Inventors
- 41
- Latest grant
- 26 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 3 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 1 | 2 |
| 2020 | 2 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 2 |
| 2023 | 1 | 2 |
| 2024 | 2 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Processes and apparatuses for burning a hydrogen fuel and a hydrocarbon fuel26 Aug 2025US 12,398,879 B2Uop LLC
- Arrangement having two burners5 Mar 2024US 11,920,785 B2Truma Gerätetechnik GmbH & Co. KG
- Flue damper with a drainage port30 Jan 2024US 11,885,493 B2Field Controls, LLC
- Flue damper having a float coupled to a damper gate18 Jul 2023US 11,703,221 B2Field Controls, LLC
- Combustion device14 Jul 2020US 10,712,001 B2Noritz Corporation
- Processes and apparatuses for burning a hydrogen fuel and a hydrocarbon fuel14 Sep 2023US 2023/0288057 A1Uop LLC
- Processes and apparatuses for burning a hydrogen fuel and a hydrocarbon fuel14 Sep 2023US 2023/0288058 A1Uop LLC
- Flue damper having a float coupled to a damper gate17 Mar 2022US 2022/0082252 A1Field Controls, LLC
- Flue damper with a drainage port17 Mar 2022US 2022/0082253 A1Field Controls, LLC
- Arrangement Having Two Burners7 Oct 2021US 2021/0310653 A1Truma Gerätetechnik GmbH & Co. KG
Most cited
By later US patents
- Positive air flow ventilation system20US 6,000,391 A1999
- Common vent device for positive vent pressure and draft hood equipped gas appliances12US 4,768,444 AGas Research Institute · 1988
- Common venting of water heater and induced draft furnace11US 6,216,685 B1Gas Research Institute · 2001
- Adjustable pipe fitting9US 5,328,213 AEljer Industries, Inc. · 1994
- Exhaust vent adapter for use with multiple heating units6US 5,421,774 AThomas & Betts Corporation · 1995