F23L 3/00
Arrangements of valves or dampers before the fire
F23L3/00 (Arrangements of valves or dampers before the fire) appears on 98 US grants and 85 published applications in this corpus.
Search patents in F23L- Granted patents
- 98
- Published applications
- 85
- Assignees
- 68
- Inventors
- 207
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 2 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 0 | 3 |
| 2011 | 2 | 1 |
| 2012 | 1 | 2 |
| 2013 | 1 | 3 |
| 2014 | 1 | 3 |
| 2015 | 3 | 9 |
| 2016 | 1 | 1 |
| 2017 | 5 | 6 |
| 2018 | 3 | 6 |
| 2019 | 3 | 0 |
| 2020 | 1 | 6 |
| 2021 | 1 | 5 |
| 2022 | 6 | 15 |
| 2023 | 6 | 8 |
| 2024 | 5 | 5 |
| 2025 | 7 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Improved mobile home heater40US 4,184,473 A1980
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- High energy combustion air nozzle and method for improving combustion in chemical recovery boilers17US 4,940,004 AJ. H. Jansen Company, Inc. · 1990
- Solid fuel heater with blowback prevention means16US 4,030,479 AMcNeil Corporation · 1977