Inventor · disambiguated record
John L. Featherstone
Also filed as: FEATHERSTONE JOHN L
35 granted patents·5 pending applications·833 citations·filing 1980–2025
98Inventor score
Files withUNION OIL CO24MIDAMERICAN ENERGY HOLDINGS CO4ENERGYSOURCE MINERALS LLC3BERKSHIRE HATHAWAY ENERGY COMPANY2FEATHERSTONE JOHN L2
Top patents by PatentIndex Score
40 records- 0196US10604414B2System and process for recovery of lithium from a geothermal brineENERGYSOURCE MINERALS LLC·Filed 2018·Granted Mar 31, 2020·32 cites·30 claims
- 0296US6458184B2Recovery of zinc from geothermal brinesMIDAMERICAN ENERGY HOLDINGS CO·Filed 2000·Granted Oct 1, 2002·45 cites·16 claims
- 0395US6682644B2Process for producing electrolytic manganese dioxide from geothermal brinesMIDAMERICAN ENERGY HOLDINGS CO·Filed 2002·Granted Jan 27, 2004·40 cites·34 claims
- 0489US4564298AHydrofoil injection nozzleUNION OIL CO·Filed 1984·Granted Jan 14, 1986·64 cites·29 claims
- 0588US4573803AInjection nozzleUNION OIL CO·Filed 1984·Granted Mar 4, 1986·49 cites·21 claims
- 0687US4765913AProcess for removing silica from silica-rich geothermal brineUNION OIL CO·Filed 1986·Granted Aug 23, 1988·65 cites·4 claims
- 0787US4522728AAcidifiction of steam condensate for incompatibility control during mixing with geothermal brineUNION OIL CO·Filed 1983·Granted Jun 11, 1985·47 cites·22 claims
- 0886US4429535AGeothermal plant silica control systemMAGMA POWER COMPANY·Filed 1980·Granted Feb 7, 1984·41 cites·12 claims
- 0986US4428200AGeothermal plant fluid reinjection systemMAGMA POWER COMPANY·Filed 1980·Granted Jan 31, 1984·45 cites·59 claims
- 1083US8313653B2Method of removing iron and calcium from a geothermal brineFEATHERSTONE JOHN L·Filed 2010·Granted Nov 20, 2012·4 cites·23 claims
- 1179US5145656ABrine treatmentUNION OIL CO·Filed 1990·Granted Sep 8, 1992·33 cites·40 claims
- 1278US5082492ARecovery of precious metals from aqueous mediaUNION OIL CO·Filed 1989·Granted Jan 21, 1992·28 cites·54 claims
- 1377US4728438AProcess for reducing the concentration of suspended solids in clarified geothermal brineUNION OIL CO·Filed 1985·Granted Mar 1, 1988·43 cites·23 claims
- 1475US6080696AMethod for cleaning fouled ion exchange resinsMIDAMERICAN ENERGY HOLDINGS CO·Filed 1998·Granted Jun 27, 2000·46 cites·21 claims
- 1574US5145515ATreatment of brineUNION OIL CO·Filed 1989·Granted Sep 8, 1992·18 cites·92 claims
- 1674US2025162893A1Process for recovery of lithium from a geothermal brineILIAD IP COMPANY LLC·Filed 2025·Application pending·0 cites
- 1774US2025162894A1Process for recovery of lithium from a geothermal brineILIAD IP COMPANY LLC·Filed 2025·Application pending·0 cites
- 1872US8894865B2Process for depleting calcium and/or iron from geothermal brinesBERKSHIRE HATHAWAY ENERGY COMPANY·Filed 2012·Granted Nov 25, 2014·1 cites·20 claims
- 1972US4763479AMethod for the production of useable steam and non-toxic solids from geothermal brineUNION OIL CO·Filed 1986·Granted Aug 16, 1988·24 cites·16 claims
- 2071US12227426B2Process for recovery of lithium from a geothermal brineENERGYSOURCE MINERALS LLC·Filed 2020·Granted Feb 18, 2025·0 cites·18 claims
- 2170US5240687ABrine treatmentUNION OIL CO·Filed 1992·Granted Aug 31, 1993·22 cites·43 claims
- 2268US7776202B2Process for producing electrolytic manganese dioxideMIDAMERICAN ENERGY HOLDINGS CO·Filed 2004·Granted Aug 17, 2010·4 cites·24 claims
- 2367US5409614AControl of scale deposition in geothermal operationsUNION OIL CO·Filed 1993·Granted Apr 25, 1995·25 cites·31 claims
- 2461US2015076064A1Process for depleting calcium and/or iron from geothermal brinesBERKSHIRE HATHAWAY ENERGY COMPANY·Filed 2014·Application pending·0 cites
- 2560US4615808AAcidification of steam condensate for incompatibility control during mixing with geothermal brineUNION OIL CO·Filed 1985·Granted Oct 7, 1986·22 cites·21 claims
- 2660US2025389001A1Process for producing enhanced manganese-zinc geothermal filter cake compositionsENERGYSOURCE MINERALS LLC·Filed 2025·Application pending·0 cites
- 2756US4776961AProcess for treating geothermal brine in two phase brine separatorsUNION OIL CO·Filed 1987·Granted Oct 11, 1988·19 cites·20 claims
- 2853US9828264B2Hydrogen sulfide abatement in geothermal facilitiesECOLAB USA INC·Filed 2014·Granted Nov 28, 2017·0 cites·10 claims
- 2953US5288411AControl of scale deposition in geothermal operationsUNION OIL CO·Filed 1992·Granted Feb 22, 1994·13 cites·49 claims
- 3052US4869066AMethod for the production of usable steam and non-toxic solids from geothermal brineUNION OIL CO·Filed 1988·Granted Sep 26, 1989·11 cites·15 claims
- 3151US4874529AProcess and apparatus for reducing the concentration of suspended solids in clarified geothermal brineUNION OIL CO·Filed 1988·Granted Oct 17, 1989·15 cites·29 claims
- 3247US5268108AControl of scale deposition in geothermal operationsUNION OIL CO·Filed 1991·Granted Dec 7, 1993·10 cites·44 claims
- 3345US5167834AProcess for treating nitrite-and sulfide-containing water to reduce nitrogen oxide and hydrogen sulfide emissions therefromUNION OIL CO·Filed 1990·Granted Dec 1, 1992·13 cites·39 claims
- 3445US5098578ATreatment of geothermal brineUNION OIL CO·Filed 1990·Granted Mar 24, 1992·13 cites·33 claims
- 3543US5032284AProcess for treating ammonia and nitrite containing waters to prevent nitric oxide emissions therefromUNION OIL CO·Filed 1989·Granted Jul 16, 1991·10 cites·57 claims
- 3643US2013186809A1Clarifier and launder systemsFEATHERSTONE JOHN L·Filed 2013·Application pending·0 cites
- 3741US5182027AProcess for treating ammonia and nitrite containing waters to reduce nitrogen oxide emissions therefromUNION OIL CO·Filed 1990·Granted Jan 26, 1993·10 cites·60 claims
- 3840US4978457AMethod of filtering a brineUNION OIL CO·Filed 1990·Granted Dec 18, 1990·9 cites·25 claims
- 3936US5413718AUse of added water to achieve 100% injection weight in geothermal operationsUNION OIL CO·Filed 1993·Granted May 9, 1995·9 cites·22 claims
- 4029US5462668AUse of steam to condensate to dilute brine stream additivesUNION OIL CO·Filed 1993·Granted Oct 31, 1995·3 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →