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John L. FEATHERSTONE
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El Centro, CA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Hydrogen sulfide abatement in geothermal facilities
Patent number
9,828,264
Issue date
Nov 28, 2017
Ecolab USA Inc.
Gregory Jacobs
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Process for depleting calcium and/or iron from geothermal brines
Patent number
8,894,865
Issue date
Nov 25, 2014
Berkshire Hathaway Energy Company
John L. Featherstone
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Method of removing iron and calcium from a geothermal brine
Patent number
8,313,653
Issue date
Nov 20, 2012
MidAmerican Energy Holdings Company
John L. Featherstone
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for producing electrolytic manganese dioxide
Patent number
7,776,202
Issue date
Aug 17, 2010
MidAmerican Energy Holdings Company
John L. Featherstone
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for producing electrolytic manganese dioxide from geotherma...
Patent number
6,682,644
Issue date
Jan 27, 2004
MidAmerican Energy Holdings Company
John L. Featherstone
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Recovery of zinc from geothermal brines
Patent number
6,458,184
Issue date
Oct 1, 2002
MidAmerican Energy Holdings Company
John L. Featherstone
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information
Patent Grant
Method for cleaning fouled ion exchange resins
Patent number
6,080,696
Issue date
Jun 27, 2000
MidAmerican Energy Holdings Company
Hilton Duke
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Use of steam to condensate to dilute brine stream additives
Patent number
5,462,668
Issue date
Oct 31, 1995
Union Oil Company of California
Darrell L. Gallup
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Use of added water to achieve 100% injection weight in geothermal o...
Patent number
5,413,718
Issue date
May 9, 1995
Union Oil Company of California
Darrell L. Gallup
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Control of scale deposition in geothermal operations
Patent number
5,409,614
Issue date
Apr 25, 1995
Union Oil Company of California
Darrell L. Gallup
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Control of scale deposition in geothermal operations
Patent number
5,288,411
Issue date
Feb 22, 1994
Union Oil Company of California
Darrell L. Gallup
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Control of scale deposition in geothermal operations
Patent number
5,268,108
Issue date
Dec 7, 1993
Union Oil Company of California
Darrell L. Gallup
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Brine treatment
Patent number
5,240,687
Issue date
Aug 31, 1993
Union Oil Company of California
Darrell L. Gallup
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Process for treating ammonia and nitrite containing waters to reduc...
Patent number
5,182,027
Issue date
Jan 26, 1993
Union Oil Company of California
Darrell L. Gallup
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Process for treating nitrite-and sulfide-containing water to reduce...
Patent number
5,167,834
Issue date
Dec 1, 1992
Union Oil Company of California
Darrell L. Gallup
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Brine treatment
Patent number
5,145,656
Issue date
Sep 8, 1992
Union Oil Company of California
Darrell L. Gallup
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Treatment of brine
Patent number
5,145,515
Issue date
Sep 8, 1992
Union Oil Company of California
Darrell L. Gallup
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Treatment of geothermal brine
Patent number
5,098,578
Issue date
Mar 24, 1992
Union Oil Company of California
Darrell L. Gallup
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Recovery of precious metals from aqueous media
Patent number
5,082,492
Issue date
Jan 21, 1992
Union Oil Company of California
Darrell L. Gallup
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Process for treating ammonia and nitrite containing waters to preve...
Patent number
5,032,284
Issue date
Jul 16, 1991
Union Oil Company of California
Darrell L. Gallup
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Method of filtering a brine
Patent number
4,978,457
Issue date
Dec 18, 1990
Union Oil Company of California
Darrell L. Gallup
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Process and apparatus for reducing the concentration of suspended s...
Patent number
4,874,529
Issue date
Oct 17, 1989
Union Oil Company of California
John L. Featherstone
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Method for the production of usable steam and non-toxic solids from...
Patent number
4,869,066
Issue date
Sep 26, 1989
Union Oil Company of California
D. Stephen Pye
F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information
Patent Grant
Process for treating geothermal brine in two phase brine separators
Patent number
4,776,961
Issue date
Oct 11, 1988
Union Oil Co. of California
Gregory A. Gritters
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Process for removing silica from silica-rich geothermal brine
Patent number
4,765,913
Issue date
Aug 23, 1988
Union Oil Co. of Calif.
John L. Featherstone
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Method for the production of useable steam and non-toxic solids fro...
Patent number
4,763,479
Issue date
Aug 16, 1988
Union Oil Co. of California
Daniel P. Hoyer
F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Information
Patent Grant
Process for reducing the concentration of suspended solids in clari...
Patent number
4,728,438
Issue date
Mar 1, 1988
Union Oil Company of California
John L. Featherstone
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Acidification of steam condensate for incompatibility control durin...
Patent number
4,615,808
Issue date
Oct 7, 1986
Union Oil Co. of California
Darrell L. Gallup
F24 - HEATING RANGES VENTILATING
Information
Patent Grant
Injection nozzle
Patent number
4,573,803
Issue date
Mar 4, 1986
Union Oil Company of California
Gregory A. Gritters
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Hydrofoil injection nozzle
Patent number
4,564,298
Issue date
Jan 14, 1986
Union Oil Company of California
Gregory A. Gritters
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
HYDROGEN SULFIDE ABATEMENT IN GEOTHERMAL FACILITIES
Publication number
20160023927
Publication date
Jan 28, 2016
Ecolab USA Inc.
Gregory Jacobs
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
PROCESS FOR DEPLETING CALCIUM AND/OR IRON FROM GEOTHERMAL BRINES
Publication number
20150076064
Publication date
Mar 19, 2015
Berkshire Hathaway Energy Company
John L. FEATHERSTONE
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
CLARIFIER AND LAUNDER SYSTEMS
Publication number
20130186809
Publication date
Jul 25, 2013
John L. FEATHERSTONE
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
PROCESS FOR DEPLETING CALCIUM AND/OR IRON FROM GEOTHERMAL BRINES
Publication number
20130068697
Publication date
Mar 21, 2013
Midamerican Energy Holdings Company
John L. FEATHERSTONE
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information
Patent Application
PROCESS FOR PRODUCING ELECTROLYTIC MANGANESE DIOXIDE
Publication number
20110049062
Publication date
Mar 3, 2011
John L. FEATHERSTONE
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information
Patent Application
Process for producing electrolytic manganese dioxide
Publication number
20040149590
Publication date
Aug 5, 2004
John L. Featherstone
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information
Patent Application
PROCESS FOR PRODUCING ELECTROLYTIC MANGANESE DIOXIDE FROM GEOTHERMA...
Publication number
20030226761
Publication date
Dec 11, 2003
John L. Featherstone
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information
Patent Application
Recovery of zinc from geothermal brines
Publication number
20010000597
Publication date
May 3, 2001
John L. Featherstone
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...