F23L 11/02
Arrangements of valves or dampers after the fire: for reducing draught by
Official title: for reducing draught by admission of air to flues
F23L11/02 (Arrangements of valves or dampers after the fire: for reducing draught by) appears on 29 US grants and 18 published applications in this corpus.
Search patents in F23L- Granted patents
- 29
- Published applications
- 18
- Assignees
- 13
- Inventors
- 41
- Latest grant
- 5 Apr 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 2 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 2 |
| 2018 | 3 | 5 |
| 2019 | 3 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
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Most cited
By later US patents
- Method and apparatus for powered flue products exhaust and preheated combustion air supply37US 4,262,608 A1981
- Power vented direct vent system29US 5,012,793 AField Controls, LLC · 1991
- Power vent blower assembly for gas water heater22US 5,255,665 AAOS Holding Company · 1993
- Airflow control and heat recovery in a managed kiln14US 9,752,078 B2Biochar Now, LLC · 2017
- Bi-loop heat recovery system for an oil fired furnace11US 4,294,223 A1981