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Class Information
Number: 122/412
Name: Liquid heaters and vaporizers > Feed heaters
Description: Subject matter comprising means for preheating water being fed to a boiler or principal heater.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7178485 |
Steam generator that includes a feedwater delivery device |
Feb. 20, 2007 |
| 6264465 |
Combustion device |
Jul. 24, 2001 |
| 6173681 |
Liquid feed pre-heater |
Jan. 16, 2001 |
| 5871006 |
Hot water heating system |
Feb. 16, 1999 |
| 5335628 |
Integrated boiler/fuel cell system |
Aug. 9, 1994 |
| 5273000 |
Reheat steam temperature control in a circulating fluidized bed steam generator |
Dec. 28, 1993 |
| 4947983 |
Distilling apparatus |
Aug. 14, 1990 |
| 4876986 |
Heat regenerator to recover both sensible and heat of condensation of flue gases |
Oct. 31, 1989 |
| 4870927 |
Device for preventing thermal stratification in a steam generator feed pipe |
Oct. 3, 1989 |
| 4869232 |
Oil and gas water heater |
Sep. 26, 1989 |
| 4842827 |
Vacuum vapor transport control |
Jun. 27, 1989 |
| 4841916 |
Evaporating apparatus with preheater |
Jun. 27, 1989 |
| 4773390 |
Demand hot water system |
Sep. 27, 1988 |
| 4714050 |
Pre-heater |
Dec. 22, 1987 |
| 4653434 |
Automatic water heater systems |
Mar. 31, 1987 |
| 4648355 |
Heat exchanger array for a step down return of condensate |
Mar. 10, 1987 |
| 4648354 |
Steam generating apparatus having a feedwater header |
Mar. 10, 1987 |
| 4561496 |
Heat exchanger for the cooling of gases, particularly from the synthesis of ammonia |
Dec. 31, 1985 |
| 4550687 |
Apparatus for operating a high pressure boiler |
Nov. 5, 1985 |
| 4537157 |
Vertical, collector-type high-pressure feed water preheater, with a desuperheater casing |
Aug. 27, 1985 |
| 4529454 |
Low C-Cr-Mo steel used under wet steam |
Jul. 16, 1985 |
| 4489679 |
Control system for economic operation of a steam generator |
Dec. 25, 1984 |
| 4484531 |
Cyclic velox boiler |
Nov. 27, 1984 |
| 4441460 |
Apparatus for heating and utilizing fluids |
Apr. 10, 1984 |
| 4418651 |
System for heating and utilizing fluids |
Dec. 6, 1983 |
| 4413669 |
Method of heat extraction from an aqueous carrier medium |
Nov. 8, 1983 |
| 4404929 |
Liquid distributor head actuated by fluid pressure |
Sep. 20, 1983 |
| 4393816 |
Thermodynamic method for steam-water separation |
Jul. 19, 1983 |
| 4318366 |
Economizer |
Mar. 9, 1982 |
| 4305452 |
Method of pre-heating boiler feed water |
Dec. 15, 1981 |
| 4258668 |
Closed pressurized feed water system supplying flash steam to a lower pressure process |
Mar. 31, 1981 |
| 4257360 |
Feed water preheater |
Mar. 24, 1981 |
| 4249486 |
Steam condensate and waste water recycling process |
Feb. 10, 1981 |
| 4182276 |
Economizer for smoke tube boilers for high pressure steam and hot water |
Jan. 8, 1980 |
| 4175518 |
Preheater device for hot water heaters |
Nov. 27, 1979 |
| 4173949 |
Feedwater preheat corrosion control system |
Nov. 13, 1979 |
| 4163430 |
Heat recovery and filter system and process for furnace exhaust gases |
Aug. 7, 1979 |
| 4147135 |
Device for reducing flue gas heat losses |
Apr. 3, 1979 |
| 4089304 |
Apparatus for supplying feedwater to a steam generator |
May. 16, 1978 |
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