Inventor · disambiguated record
Willem P. C. Duyvesteyn
Also filed as: DUYVESTEYN WILLEM · DUYVESTEYN WILLEM P · DUYVESTEYN WILLEM P C
61 granted patents·13 pending applications·1,772 citations·filing 1977–2023
99Inventor score
Files withDUYVESTEYN WILLEM P C18BHP MINERALS INT INC14MARATHON OIL CANADA CORP13SCANDIUM INT MINING CORPORATION9AMAX INC8
Top patents by PatentIndex Score
74 records- 0197US6440383B1Processing aqueous titanium chloride solutions to ultrafine titanium dioxideALTAIR NANOMATERIALS INC·Filed 2000·Granted Aug 27, 2002·111 cites·34 claims
- 0297US6312500B1Heap leaching of nickel containing oreBHP MINERALS INT INC·Filed 2000·Granted Nov 6, 2001·59 cites·12 claims
- 0396US5571308AMethod for recovering nickel from high magnesium-containing Ni-Fe-Mg lateritic oreBHP MINERALS INT INC·Filed 1995·Granted Nov 5, 1996·100 cites·18 claims
- 0495US9982326B2Solvent extraction of scandium from leach solutionsSCANDIUM INT MINING CORPORATION·Filed 2015·Granted May 29, 2018·7 cites·47 claims
- 0595US9982325B2Systems and methodologies for direct acid leaching of scandium-bearing oresSCANDIUM INT MINING CORPORATION·Filed 2015·Granted May 29, 2018·6 cites·28 claims
- 0695US5968349AExtraction of bitumen from bitumen froth and biotreatment of bitumen froth tailings generated from tar sandsBHP MINERALS INT INC·Filed 1998·Granted Oct 19, 1999·493 cites·36 claims
- 0794US6375923B1Processing titaniferous ore to titanium dioxide pigmentALTAIR NANOMATERIALS INC·Filed 2000·Granted Apr 23, 2002·109 cites·31 claims
- 0893US11732326B1Extraction of lithium from mudstone and sequestration of carbon dioxideEXTRACTIVE METALLURGY CONSULTANCY LLC·Filed 2023·Granted Aug 22, 2023·4 cites·19 claims
- 0993US7585407B2Processing asphaltene-containing tailingsMARATHON OIL CANADA CORP·Filed 2006·Granted Sep 8, 2009·30 cites·30 claims
- 1093US6548039B1Processing aqueous titanium solutions to titanium dioxide pigmentALTAIR NANOMATERIALS INC·Filed 2000·Granted Apr 15, 2003·56 cites·34 claims
- 1192US7985333B2System and method of separating bitumen from tar sandsMARATHON OIL CANADA CORP·Filed 2008·Granted Jul 26, 2011·16 cites·13 claims
- 1292US7909989B2Method for obtaining bitumen from tar sandsMARATHON OIL CANADA CORP·Filed 2005·Granted Mar 22, 2011·38 cites·32 claims
- 1392US6350420B1Resin-in-pulp method for recovery of nickel and cobaltBHP MINERALS INT INC·Filed 2000·Granted Feb 26, 2002·44 cites·25 claims
- 1492US4610722AProcess for metal recovery from steel plant dustAMAX INC·Filed 1985·Granted Sep 9, 1986·46 cites·9 claims
- 1591US11673812B2Countercurrent process for recovering high purity copper sulfate values from low grade oresSCANDIUM INT MINING CORP·Filed 2020·Granted Jun 13, 2023·2 cites·28 claims
- 1691US5229003ARecovery of base materials from geothermal brinesBHP MINERALS INT INC·Filed 1991·Granted Jul 20, 1993·42 cites·54 claims
- 1791US5176802ATreatment of copper sulfide concentratesDUYVESTEYN WILLEM P C·Filed 1991·Granted Jan 5, 1993·75 cites·18 claims
- 1889US7618597B2Nozzle reactor and method of useMARATHON OIL CANADA CORP·Filed 2005·Granted Nov 17, 2009·18 cites·20 claims
- 1989US6395061B1Process for organic acid bioleaching of oreBHP MINERALS INT INC·Filed 2000·Granted May 28, 2002·23 cites·20 claims
- 2089US6074558ABiochemical treatment of bitumen froth tailingsBHP MINERALS INT INC·Filed 1998·Granted Jun 13, 2000·87 cites·23 claims
- 2188US7811444B2Oxidation of asphaltenesMARATHON OIL CANADA CORP·Filed 2006·Granted Oct 12, 2010·18 cites·30 claims
- 2287US8529687B2Oxidation of asphaltenesDUYVESTEYN WILLEM P C·Filed 2010·Granted Sep 10, 2013·6 cites·23 claims
- 2387US7824453B2Biodiesel production and use in oil sands processingMARATHON OIL CANADA CORP·Filed 2006·Granted Nov 2, 2010·15 cites·6 claims
- 2487US4610721ATwo-stage leaching process for steel plant dustsAMAX INC·Filed 1985·Granted Sep 9, 1986·32 cites·10 claims
- 2586US8449763B2Nozzle reactor and method of useDUYVESTEYN WILLEM P C·Filed 2010·Granted May 28, 2013·6 cites·10 claims
- 2685US4572771AZinc recovery from steel plant dusts and other zinciferous materialsAMAX INC·Filed 1985·Granted Feb 25, 1986·31 cites·5 claims
- 2784US7988847B2Nozzle reactor and method of useMARATHON OIL CANADA CORP·Filed 2008·Granted Aug 2, 2011·10 cites·6 claims
- 2884US5441712AHydrometallurgical process for producing zinc oxideBHP MINERALS INT INC·Filed 1993·Granted Aug 15, 1995·40 cites·2 claims
- 2984US4098870AAcid leaching of nickeliferous oxide ores with minimized scalingAMAX INC·Filed 1977·Granted Jul 4, 1978·26 cites·16 claims
- 3083US10988828B2Extraction of scandium values from copper leach solutionsSCANDIUM INT MINING CORPORATION·Filed 2018·Granted Apr 27, 2021·1 cites·20 claims
- 3182US7998342B2Separation of tailings that include asphaltenesMARATHON OIL CANADA CORP·Filed 2008·Granted Aug 16, 2011·11 cites·27 claims
- 3281US8257580B2Dry, stackable tailings and methods for producing the sameDUYVESTEYN WILLEM P C·Filed 2009·Granted Sep 4, 2012·8 cites·39 claims
- 3381US7927565B2Nozzle reactor and method of useMARATHON OIL CANADA CORP·Filed 2009·Granted Apr 19, 2011·10 cites·12 claims
- 3480US8372367B2System and method for recovering boron values from plant tailingsEMC METALS CORP·Filed 2010·Granted Feb 12, 2013·4 cites·19 claims
- 3578US10260127B2Method for recovering scandium values from leach solutionsSCANDIUM INT MINING CORP·Filed 2018·Granted Apr 16, 2019·1 cites·27 claims
- 3677US6387239B1Recovery of metals from oreBHP MINERALS INT INC·Filed 1999·Granted May 14, 2002·26 cites·50 claims
- 3775US4605435ARecycling of steel plant dusts to steel furnacesAMAX INC·Filed 1985·Granted Aug 12, 1986·19 cites·3 claims
- 3874US8658029B2Dry, stackable tailings and methods for producing the sameDUYVESTEYN WILLEM P C·Filed 2012·Granted Feb 25, 2014·2 cites·13 claims
- 3974US4614543AMixed lixiviant for separate recovery of zinc and lead from iron-containing waste materialsAMAX INC·Filed 1985·Granted Sep 30, 1986·34 cites·5 claims
- 4072US5292490ARecovery platinum group metals from oxides oresBHP MINERALS INT INC·Filed 1992·Granted Mar 8, 1994·15 cites·11 claims
- 4171US10378085B2Recovery of scandium values through selective precipitation of hematite and basic iron sulfates from acid leachatesSCANDIUM INT MINING CORPORATION·Filed 2018·Granted Aug 13, 2019·0 cites·24 claims
- 4271US8101067B2Methods for obtaining bitumen from bituminous materialsDUYVESTEYN WILLEM P C·Filed 2009·Granted Jan 24, 2012·4 cites·30 claims
- 4370US12338509B2Byproduct scandium recovery from low grade primary metal oxide oresSCANDIUM INT MINING CORP·Filed 2020·Granted Jun 24, 2025·0 cites·15 claims
- 4470US8435402B2Nozzle reactor and method of useDUYVESTEYN WILLEM P C·Filed 2010·Granted May 7, 2013·2 cites·25 claims
- 4570US6340423B1Hydrometallurgical processing of lead materials using fluotitanateBHP MINERALS INT INC·Filed 2000·Granted Jan 22, 2002·6 cites·22 claims
- 4668US11821057B2Recovery of critical metals from SX-EW copper raffinate and other solutions derived from leaching ores with sulfuric acidSCANDIUM INT MINING CORPORATION·Filed 2021·Granted Nov 21, 2023·0 cites·24 claims
- 4768US4195065ALeaching nickeliferous oxide oresAMAX INC·Filed 1978·Granted Mar 25, 1980·12 cites·13 claims
- 4867US10450634B2Scandium-containing master alloys and method for making the sameSCANDIUM INT MINING CORPORATION·Filed 2017·Granted Oct 22, 2019·0 cites·24 claims
- 4964US11471984B2Control of recrystallization in cold-rolled AlMn(Mg)ScZr sheets for brazing applicationsSCANDIUM INT MINING CORP·Filed 2019·Granted Oct 18, 2022·0 cites·20 claims
- 5063US11691888B2Process for the preparation of high purity aluminaSCANDIUM INT MINING CORPORATION·Filed 2021·Granted Jul 4, 2023·0 cites·31 claims
Showing the top 50 of 74 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →