F22B 7/20
Furnace tubes
F22B7/20 (Furnace tubes) appears on 7 US grants and 1 published applications in this corpus.
Search patents in F22B- Granted patents
- 7
- Published applications
- 1
- Assignees
- 6
- Inventors
- 9
- Latest grant
- 13 Jan 2004
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 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 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Heat exchanger with internal pin elements13 Jan 2004US 6,675,746 B2Advanced Mechanical Technology, Inc.
- Ultra-low NO.sub.x combustion apparatus5 Feb 1991US 4,989,549 ADonlee Technologies, Inc.
- Swirl combustion apparatus14 Nov 1989US 4,879,959 ADonlee Technologies, Inc.
- Structural improvement in the burning chamber of a horizontal boiler9 Jun 1987US 4,671,213 A
- Combustion of halogenated hydrocarbons with heat recovery9 Dec 1986US 4,627,388 AThe Dow Chemical Company
Most cited
By later US patents
- Ultra-low NO.sub.x combustion apparatus36US 4,989,549 ADonlee Technologies, Inc. · 1991
- Combustion of halogenated hydrocarbons with heat recovery19US 4,627,388 AThe Dow Chemical Company · 1986
- Swirl combustion apparatus16US 4,879,959 ADonlee Technologies, Inc. · 1989
- Heat exchanger with internal pin elements11US 6,675,746 B2Advanced Mechanical Technology, Inc. · 2004
- Industrial boiler utilizing multiple fuels and having reduced particulate emission and method of combustion8US 4,162,686 ABurnham Corporation · 1979