F22B 7/18
Walling of flues
Official title: Walling of flues; Flue-gas header boxes
F22B7/18 (Walling of flues) appears on 4 US grants and 2 published applications in this corpus.
Search patents in F22B- Granted patents
- 4
- Published applications
- 2
- Assignees
- 2
- Inventors
- 8
- Latest grant
- 2 Mar 2010
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 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 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Boiler gas flow distribution fin apparatus and method2 Mar 2010US 7,669,535 B2The Marley-Wylain Company
- Gas water heater damper/baffle25 Dec 2007US 7,311,064 B2
- Telescopic baffle for water heater21 Feb 2006US 7,000,572 B1
- Combustion of halogenated hydrocarbons1 Apr 1980US 4,195,596 AThe Dow Chemical Company
Most cited
By later US patents