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Class Information
Number: 122/20B
Name: Liquid heaters and vaporizers > Subsidiary > Subsidiary-heater offtake flue
Description:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7415944 |
Heat exchanger suitable for a boiler, and a boiler including such a heat exchanger |
Aug. 26, 2008 |
| 7360507 |
Energy saving apparatus |
Apr. 22, 2008 |
| 7331312 |
Waste heat recovery apparatus and method for boiler system |
Feb. 19, 2008 |
| 6907846 |
Condensing gas boiler having structure of preventing corrosion caused by using heterogeneous metal |
Jun. 21, 2005 |
| 6886501 |
Apparatus and process for heating steam |
May. 3, 2005 |
| 6840199 |
Process for heating system |
Jan. 11, 2005 |
| 6799538 |
Heating apparatus using useless heat for reducing oil |
Oct. 5, 2004 |
| 6766772 |
Apparatus for heating steam |
Jul. 27, 2004 |
| 6672255 |
Flue gas energy transfer system |
Jan. 6, 2004 |
| 6564755 |
Preheating assembly for hot water system |
May. 20, 2003 |
| 6536378 |
Apparatus for evacuating condensation from furnace pipe systems |
Mar. 25, 2003 |
| 6145139 |
Supplementary water heater system for swimming pools and spa |
Nov. 14, 2000 |
| 6021724 |
Cyclone furnace for retrofit applications |
Feb. 8, 2000 |
| 5852990 |
Waste heat boiler |
Dec. 29, 1998 |
| 5823175 |
Thermal protective barrier |
Oct. 20, 1998 |
| 5730088 |
Heat recovery steam generator |
Mar. 24, 1998 |
| 5626102 |
Heat recovery system for a boiler and a boiler provided therewith |
May. 6, 1997 |
| 5577661 |
Pool water heating and circulating system |
Nov. 26, 1996 |
| 5560209 |
Arrangement for improving efficiency of a power plant |
Oct. 1, 1996 |
| 5452686 |
Waste heat boiler |
Sep. 26, 1995 |
| 5406934 |
Heat recovery apparatus for use with a non-high efficiency furnace |
Apr. 18, 1995 |
| 5347958 |
Heat recovery apparatus and an improved heat recovery method |
Sep. 20, 1994 |
| 5305954 |
Heating systems |
Apr. 26, 1994 |
| 5299534 |
Single-drum recovery boiler |
Apr. 5, 1994 |
| 5273002 |
Water tube boiler |
Dec. 28, 1993 |
| 5129331 |
Emissionless furnace boiler system |
Jul. 14, 1992 |
| 5109807 |
High output mini hydronic heater |
May. 5, 1992 |
| 5097801 |
Waste energy hot water heater |
Mar. 24, 1992 |
| 5052345 |
Heating apparatus with a heat exchanger |
Oct. 1, 1991 |
| 5029442 |
Heat feeding apparatus for internal combustion engine having supercharger attached |
Jul. 9, 1991 |
| 5027720 |
Emissionless furnace boiler system |
Jul. 2, 1991 |
| 5005542 |
Engine preheating device |
Apr. 9, 1991 |
| 4971025 |
Gas-powered apparatus for producing warm water and for heating an enclosed space |
Nov. 20, 1990 |
| 4944250 |
Cyclone separator including a hopper formed by water-steam cooled walls |
Jul. 31, 1990 |
| 4938172 |
Supplement system for transferring heat from a furnace exhaust stack to a hot water tank |
Jul. 3, 1990 |
| 4936505 |
Gas-fired coaxial water/air vehicle heater |
Jun. 26, 1990 |
| 4934451 |
Apparatus and method for conditioning air |
Jun. 19, 1990 |
| 4911359 |
Apparatus for and method of recovering chimney heat |
Mar. 27, 1990 |
| 4909318 |
Method and apparatus for recovering heat from flue gases and for cleaning the same |
Mar. 20, 1990 |
| 4892045 |
Condensate drain system |
Jan. 9, 1990 |
| 4887586 |
Heat recovery apparatus |
Dec. 19, 1989 |
| 4876986 |
Heat regenerator to recover both sensible and heat of condensation of flue gases |
Oct. 31, 1989 |
| RE33082 |
Combustion product condensing water heater |
Oct. 10, 1989 |
| 4871308 |
Method and apparatus for heating a fluid stream |
Oct. 3, 1989 |
| 4848277 |
Calorific value boiler |
Jul. 18, 1989 |
| 4830093 |
Method and apparatus for utilizing waste heat in a combustion system |
May. 16, 1989 |
| 4821682 |
Method and apparatus for utilizing waste heat in hot water heaters |
Apr. 18, 1989 |
| 4798240 |
Integrated space heating, air conditioning and potable water heating appliance |
Jan. 17, 1989 |
| 4766883 |
Forced draft controlled mixture heating system using a closed combustion chamber |
Aug. 30, 1988 |
| 4751913 |
Apparatus for heating water |
Jun. 21, 1988 |
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