Inventor
FEATHERSTONE JOHN L
US35 patents
⚠️ This page may combine multiple inventors who share the name “FEATHERSTONE JOHN L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
UNION OIL CO
24 patentsUS4765913AAug 23, 1988
Process for removing silica from silica-rich geothermal brine
UNION OIL CO65 citations96
US5409614AApr 25, 1995
Control of scale deposition in geothermal operations
UNION OIL CO25 citations93
US4564298AJan 14, 1986
Hydrofoil injection nozzle
UNION OIL CO64 citations93
US4522728AJun 11, 1985
Acidifiction of steam condensate for incompatibility control during mixing with geothermal brine
UNION OIL CO47 citations93
US5240687AAug 31, 1993
Brine treatment
UNION OIL CO22 citations91
US5145656ASep 8, 1992
Brine treatment
UNION OIL CO33 citations91
US5082492AJan 21, 1992
Recovery of precious metals from aqueous media
UNION OIL CO28 citations91
US4573803AMar 4, 1986
Injection nozzle
UNION OIL CO49 citations90
US4728438AMar 1, 1988
Process for reducing the concentration of suspended solids in clarified geothermal brine
UNION OIL CO43 citations86
US4615808AOct 7, 1986
Acidification of steam condensate for incompatibility control during mixing with geothermal brine
UNION OIL CO22 citations82
US5145515ASep 8, 1992
Treatment of brine
UNION OIL CO18 citations81
US4763479AAug 16, 1988
Method for the production of useable steam and non-toxic solids from geothermal brine
UNION OIL CO24 citations81
US5413718AMay 9, 1995
Use of added water to achieve 100% injection weight in geothermal operations
UNION OIL CO9 citations74
US5288411AFeb 22, 1994
Control of scale deposition in geothermal operations
UNION OIL CO13 citations74
US5268108ADec 7, 1993
Control of scale deposition in geothermal operations
UNION OIL CO10 citations74
US5182027AJan 26, 1993
Process for treating ammonia and nitrite containing waters to reduce nitrogen oxide emissions therefrom
UNION OIL CO10 citations74
US5167834ADec 1, 1992
Process for treating nitrite-and sulfide-containing water to reduce nitrogen oxide and hydrogen sulfide emissions therefrom
UNION OIL CO13 citations74
US5098578AMar 24, 1992
Treatment of geothermal brine
UNION OIL CO13 citations74
US5032284AJul 16, 1991
Process for treating ammonia and nitrite containing waters to prevent nitric oxide emissions therefrom
UNION OIL CO10 citations74
US4978457ADec 18, 1990
Method of filtering a brine
UNION OIL CO9 citations74
US4776961AOct 11, 1988
Process for treating geothermal brine in two phase brine separators
UNION OIL CO19 citations72
US4869066ASep 26, 1989
Method for the production of usable steam and non-toxic solids from geothermal brine
UNION OIL CO11 citations71
US4874529AOct 17, 1989
Process and apparatus for reducing the concentration of suspended solids in clarified geothermal brine
UNION OIL CO15 citations68
US5462668AOct 31, 1995
Use of steam to condensate to dilute brine stream additives
UNION OIL CO3 citations60
MIDAMERICAN ENERGY HOLDINGS CO
4 patentsUS6682644B2Jan 27, 2004
Process for producing electrolytic manganese dioxide from geothermal brines
MIDAMERICAN ENERGY HOLDINGS CO40 citations93
US6458184B2Oct 1, 2002
Recovery of zinc from geothermal brines
MIDAMERICAN ENERGY HOLDINGS CO45 citations92
US6080696AJun 27, 2000
Method for cleaning fouled ion exchange resins
MIDAMERICAN ENERGY HOLDINGS CO46 citations88
US7776202B2Aug 17, 2010
Process for producing electrolytic manganese dioxide
MIDAMERICAN ENERGY HOLDINGS CO4 citations71