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John M. Lehto
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Cokato, MN, US
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Patents Grants
last 30 patents
Information
Patent Grant
Dehumidification using desiccants and multiple effect evaporators
Patent number
6,514,321
Issue date
Feb 4, 2003
PowerMax, Inc.
John M. Lehto
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Method and arrangement for cooling air to gas turbine inlet
Patent number
5,203,161
Issue date
Apr 20, 1993
John M. Lehto
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Cogeneration process for production of energy and iron materials, i...
Patent number
5,066,325
Issue date
Nov 19, 1991
Northern States Power Company
John M. Lehto
C21 - METALLURGY OF IRON
Information
Patent Grant
Apparatus for production of energy and iron materials, including steel
Patent number
5,064,174
Issue date
Nov 12, 1991
Northern States Power Company
John M. Lehto
C21 - METALLURGY OF IRON
Information
Patent Grant
Cogeneration process for production of energy and iron materials
Patent number
5,055,131
Issue date
Oct 8, 1991
Northern States Power Company
John M. Lehto
C21 - METALLURGY OF IRON
Information
Patent Grant
Cogeneration process for production of energy and iron materials, i...
Patent number
5,045,112
Issue date
Sep 3, 1991
Northern States Power Company
John M. Lehto
C21 - METALLURGY OF IRON
Information
Patent Grant
Method for the processing of fly ash, scrubber sludge and the like;...
Patent number
5,019,360
Issue date
May 28, 1991
Northern States Power Company
John M. Lehto
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Retrofit flue gas scrubber system
Patent number
4,986,966
Issue date
Jan 22, 1991
Northern States Power Company
John M. Lehto
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Flue gas scrubber system with chloride removal
Patent number
4,861,558
Issue date
Aug 29, 1989
Northern States Power Company
John M. Lehto
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Flue gas scrubber system
Patent number
4,853,195
Issue date
Aug 1, 1989
Northern States Power Company
John M. Lehto
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Flue gas scrubber system
Patent number
4,762,686
Issue date
Aug 9, 1988
Northern States Power Company
John M. Lehto
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL