| Patents for F22B 21 - Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically (973) |
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| 02/14/1996 | CN2220011Y Multifunctional civil atmospheric boiler |
| 01/11/1996 | WO1996000869A1 Marine boiler |
| 01/09/1996 | US5482009 Combustion device in tube nested boiler and its method of combustion |
| 12/05/1995 | US5471957 Compact boiler having low NOx emissions |
| 11/22/1995 | CN2213276Y High effective energy-saving vertical boiler |
| 10/11/1995 | EP0676463A2 A fired heater having drop down corbelling |
| 10/09/1995 | CA2144197A1 Drop down corbelling |
| 09/20/1995 | CN2208166Y 立式蒸气锅炉 Vertical Steam Boiler |
| 09/13/1995 | CN2207515Y Middle-small size steam, water boiler |
| 09/06/1995 | CN2206898Y Automatic efficient three-purpose fuel boiler |
| 08/01/1995 | US5437247 Drop down corbelling (LAW029) |
| 07/18/1995 | US5433174 Method and apparatus for low NOX combustion of gaseous fuels |
| 07/13/1995 | DE4400286A1 Steam or hot water boiler with one or more vertical radiation flues |
| 06/29/1995 | DE4344409A1 Heat exchanger tubular element with throttle disc |
| 06/29/1995 | DE4344408A1 Steam or hot water boiler |
| 04/26/1995 | EP0450072B1 Square multi-pipe once-through boiler |
| 04/06/1995 | WO1995009325A1 Process for operating a continuous steam generator and continuous steam generator thus operated |
| 03/07/1995 | US5394837 High-efficiency furnace |
| 03/02/1995 | WO1995006190A1 Steam generator and steam turbine driving unit for the use of gaseous propellant, especially hydrogen |
| 03/02/1995 | CA2170290A1 Steam generator and steam turbine driving unit for the use of gaseous propellant, especially hydrogen |
| 02/08/1995 | EP0533856B1 Water tube boiler |
| 01/04/1995 | CN2186856Y Horizontal non-brick multi-return atmospheric boiler |
| 11/01/1994 | US5359966 Energy converter using imploding plasma vortex heating |
| 10/12/1994 | CN2179525Y Multifunction combined pressureless boiler |
| 10/11/1994 | US5353749 Boiler design |
| 10/11/1994 | US5353748 Combustion method and apparatus for reducing emission concentrations of NOx and CO |
| 09/14/1994 | CN2177162Y Angled tube forced circulation boiler |
| 08/31/1994 | CN2175870Y Vertical vortex boiler |
| 08/02/1994 | US5333574 Compact boiler having low NOX emissions |
| 05/25/1994 | CN1087028A Fluidized bed reactor system and method having a heat exchanger |
| 04/13/1994 | CN1085303A Combustion method and apparatus for reducing emission concentrations of NOX and CO |
| 02/01/1994 | CA2032711C Boiler |
| 01/11/1994 | US5276966 Enhanced stored chemical energy powered boiler |
| 12/28/1993 | US5273002 Water tube boiler |
| 12/28/1993 | US5273001 Quadrangular type multi-tube once-through boiler |
| 12/15/1993 | EP0574176A1 Fluidized bed reactor system and method having a heat exchanger |
| 12/09/1993 | CA2097572A1 Fluidized bed reactor system and method having a heat exchanger |
| 11/18/1993 | DE4216278A1 Water-tube boiler esp. for superheated high-pressure steam prodn. - incorporates coaxial tapered helical preheater and superheater joined by closely coiled evaporator in flow of hot fluid |
| 11/09/1993 | US5259343 Apparatus for providing uniform heat transfer in superheating steam generators |
| 11/09/1993 | US5259342 Method and apparatus for low NOX combustion of gaseous fuels |
| 10/19/1993 | US5253703 Waste heat exchanger |
| 09/22/1993 | CN2142530Y Vertical all-pipe Boiler |
| 09/21/1993 | US5245822 Compact turbine assembly |
| 08/31/1993 | US5239946 Fluidized bed reactor system and method having a heat exchanger |
| 08/31/1993 | CA2001428C Modular boiler furnace walls |
| 07/07/1993 | CN2137755Y Atmospheric multifunction vertical boiler |
| 05/05/1993 | CN2132080Y Hydrocooling burnt-proof device for boiler |
| 05/04/1993 | CA1317085C Method and apparatus for extracting saturated steam in the synthesis of hydrogen chloride gas |
| 04/13/1993 | US5201282 Upflow/downflow heated tube circulating system |
| 04/06/1993 | US5199384 Quadrangular type multi-tube once-through boiler |
| 01/05/1993 | US5176110 Upflow/downflow heated tube circulating system |
| 12/30/1992 | CN2126371U Vertical atmospheric domestic boiler with detachable combustion chamber |
| 12/30/1992 | CN1019683B High pressure steam generator |
| 10/29/1992 | WO1992018806A1 Water tube boiler |
| 09/10/1992 | DE4106868A1 Gas turbine exhaust boiler - has peripheral cooling pipes connected at right angles to distributor and collector pipes |
| 08/26/1992 | CN1018016B Multipurpose vertical boiler |
| 08/19/1992 | CN2113403U Small size vertical waterpipe boiler |
| 08/05/1992 | CN1017744B Boiler for low nitrogen oxide |
| 07/29/1992 | CN2111445U Fast assembling horizontal gasification burning boiler |
| 07/21/1992 | US5131351 Heat exchanger plug |
| 06/03/1992 | CN1016887B Upflow / downflow heated tube circulating system |
| 05/20/1992 | CN2104993U Safety and quick steam boiler combined lower part burning with waterpipe |
| 05/20/1992 | CN2104992U Multifunctional pressureless aluminium household stove |
| 04/08/1992 | CN2101175U Composite water pipe exhausting heat boiler |
| 02/13/1992 | DE4025252A1 Incinerator waste-heat boiler - has contact-heating surfaces in horizontal portion level with gas-radiation chamber |
| 01/22/1992 | CN2093962U Atmospheric hot-water boiler |
| 12/27/1991 | EP0462486A1 Variable-pressure once-through boiler furnace evaporating tube unit |
| 12/13/1991 | CA2043087A1 Boiler |
| 12/03/1991 | CA1292650C Advanced heater |
| 11/27/1991 | CN1014926B Fluidized bed calcination boiler for thermo-electricity-cement joint production |
| 11/26/1991 | US5067419 Low nox boiler |
| 10/09/1991 | EP0450072A1 Square multi-pipe once-through boiler |
| 09/24/1991 | US5050542 Boiler |
| 08/21/1991 | CN1053948A High pressure cooker for use striding over |
| 06/04/1991 | US5020479 Watertube boiler and its method of combustion |
| 05/01/1991 | CN1051076A Upflow/downflow heated tube circulating system |
| 05/01/1991 | CN1012519B Vertical boiler |
| 04/30/1991 | US5011916 Preparation of 99m Tc radiopharmaceuticals |
| 04/24/1991 | EP0423931A1 Steam generating system |
| 04/24/1991 | EP0166746B1 Preparation of ?99m tc radiopharmaceuticals |
| 04/09/1991 | US5005530 Furnace radiant sections with vertical heat exchanger tubing, and convection section |
| 04/04/1991 | DE3931580A1 Radiation-type steam-generator - has vertical gas-tight cooled partition fire-box with open pipe grid at top |
| 03/06/1991 | CN2072641U Vertical bend tube boiler with duallayer fire grate |
| 02/19/1991 | US4993368 Boiler tube structure |
| 02/05/1991 | US4989405 Combined cycle power plant |
| 01/08/1991 | US4982703 Upflow/downflow heated tube circulating system |
| 12/19/1990 | CN1047916A Fluidized bed calcination boiler for thermo-electricity-cement joint production |
| 12/05/1990 | CN1047559A Multi-purpose vertical boiler |
| 11/28/1990 | CN1010610B Vertical boiler and feeding system thereof |
| 11/21/1990 | CN2066100U Non-barrel multi-pipe waterpipe type steam boiler |
| 11/07/1990 | CN2065280U Mutli-purpose vertical boiler |
| 11/06/1990 | US4967699 Steam generator |
| 10/17/1990 | CN2064008U Oil-burning vertical pipe steam boiler of ship |
| 10/04/1990 | WO1990011472A1 Heat exchanger |
| 10/03/1990 | CN1045855A Micro-circulation boiler of high efficiency and energy saving |
| 09/11/1990 | CA1273856A1 Boiler, and a tube assembly therefor |
| 08/29/1990 | CN1044979A Boiler and its burner and burning method thereof |
| 08/21/1990 | CA1273006A1 Apparatus for producing a heated fluid |
| 08/21/1990 | CA1272913A1 Multi-pipe once-through type boiler |
| 07/11/1990 | CN1008767B Hot water heater and steam generator |