| Patent | Date |
|---|
Process For The Preparation Of High Purity Alumina
App 20210371294 - Duyvesteyn; Willem P.C. | 2021-12-02 |
Countercurrent Process For Recovering High Purity Copper Sulfate Values From Low Grade Ores
App 20210347651 - Duyvesteyn; Willem P.C. | 2021-11-11 |
Systems and processes for recovering scandium values from laterite ores
Grant 11,142,809 - Duyvesteyn October 12, 2 | 2021-10-12 |
Recovery Of Critical Metals From Sx-ew Copper Raffinate And Other Solutions Derived From Leaching Ores With Sulfuric Acid
App 20210277497 - Duyvesteyn; Willem P.C. | 2021-09-09 |
Byproduct Scandium Recovery From Low Grade Primary Metal Oxide Ores
App 20210172041 - Duyvesteyn; Willem P.C. | 2021-06-10 |
Extraction of scandium values from copper leach solutions
Grant 10,988,828 - Duyvesteyn April 27, 2 | 2021-04-27 |
CONTROL OF RECRYSTALLIZATION IN COLD-ROLLED AlMn(Mg)ScZr SHEETS FOR BRAZING APPLICATIONS
App 20200001407 - Duyvesteyn; Willem P.C. | 2020-01-02 |
Scandium-containing master alloys and method for making the same
Grant 10,450,634 - Duyvesteyn Oc | 2019-10-22 |
Recovery of scandium values through selective precipitation of hematite and basic iron sulfates from acid leachates
Grant 10,378,085 - Duyvesteyn A | 2019-08-13 |
Extraction Of Scandium Values From Copper Leach Solutions
App 20190161827 - Duyvesteyn; Willem P.C. | 2019-05-30 |
Method for recovering scandium values from leach solutions
Grant 10,260,127 - Duyvesteyn | 2019-04-16 |
Method For Recovering Scandium Values From Leach Solutions
App 20180312940 - Duyvesteyn; Willem P.C. | 2018-11-01 |
Recovery Of Scandium Values Through Selective Precipitation Of Hematite And Basic Iron Sulfates From Acid Leachates
App 20180282840 - Duyvesteyn; Willem P.C. | 2018-10-04 |
Systems and methodologies for direct acid leaching of scandium-bearing ores
Grant 9,982,325 - Duyvesteyn May 29, 2 | 2018-05-29 |
Solvent extraction of scandium from leach solutions
Grant 9,982,326 - Duyvesteyn May 29, 2 | 2018-05-29 |
Scandium-containing Master Alloys And Method For Making The Same
App 20180030577 - Duyvesteyn; Willem P.C. | 2018-02-01 |
Systems and Processes for Recovering Scandium Values From Laterite Ores
App 20160289795 - Duyvesteyn; Willem P.C. | 2016-10-06 |
Solvent Extraction Of Scandium From Leach Solutions
App 20160177420 - Duyvesteyn; Willem P.C. | 2016-06-23 |
Systems And Methodologies For Direct Acid Leaching Of Scandium-bearing Ores
App 20160153070 - Duyvesteyn; Willem P.C. | 2016-06-02 |
Methods for extracting bitumen from bituminous material
Grant 8,877,044 - Duyvesteyn , et al. November 4, 2 | 2014-11-04 |
Methods for obtaining bitumen from bituminous materials
Grant 8,864,982 - Duyvesteyn , et al. October 21, 2 | 2014-10-21 |
Processing asphaltene-containing tailings
Grant 8,679,325 - Duyvesteyn , et al. March 25, 2 | 2014-03-25 |
Methods for obtaining bitumen from bituminous materials
Grant 8,663,462 - Duyvesteyn March 4, 2 | 2014-03-04 |
Dry, stackable tailings and methods for producing the same
Grant 8,658,029 - Duyvesteyn , et al. February 25, 2 | 2014-02-25 |
Nozzle Reactor And Method Of Use
App 20130306519 - Duyvesteyn; Willem P.C. | 2013-11-21 |
Oxidation of asphaltenes
Grant 8,529,687 - Duyvesteyn , et al. September 10, 2 | 2013-09-10 |
Nozzle reactor and method of use
Grant 8,449,763 - Duyvesteyn May 28, 2 | 2013-05-28 |
Nozzle reactor and method of use
Grant 8,435,402 - Duyvesteyn , et al. May 7, 2 | 2013-05-07 |
System and method for recovering boron values from plant tailings
Grant 8,372,367 - Duyvesteyn February 12, 2 | 2013-02-12 |
Processing asphaltene-containing tailings
Grant 8,354,067 - Duyvesteyn , et al. January 15, 2 | 2013-01-15 |
Dry, Stackable Tailings and Methods for Producing the Same
App 20120305452 - Duyvesteyn; Willem P. C. ; et al. | 2012-12-06 |
System and Method For Recovering Boron Values From Plant Tailings
App 20120263637 - Duyvesteyn; Willem P. C. | 2012-10-18 |
Dry, stackable tailings and methods for producing the same
Grant 8,257,580 - Duyvesteyn , et al. September 4, 2 | 2012-09-04 |
System and Method for Recovery of Scandium Values From Scandium-Containing Ores
App 20120207656 - Duyvesteyn; Willem P.C. | 2012-08-16 |
System and Method for Recovery of Nickel Values From Nickel-Containing Ores
App 20120204680 - Duyvesteyn; Willem P. C. | 2012-08-16 |
Methods of Upgrading Asphaltene Compositions
App 20120151834 - Duyvesteyn; Willem P. C. ; et al. | 2012-06-21 |
Low Carbon Dioxide Footprint Process For Coal Liquefaction
App 20120055850 - Duyvesteyn; Willem P.C. | 2012-03-08 |
Methods for obtaining bitumen from bituminous materials
Grant 8,101,067 - Duyvesteyn , et al. January 24, 2 | 2012-01-24 |
In Situ Ore Leaching Using Freeze Barriers
App 20110298270 - Duyvesteyn; Willem P.C. | 2011-12-08 |
Nozzle Reactor And Method Of Use
App 20110233114 - Duyvesteyn; Willem P.C. ; et al. | 2011-09-29 |
Separation of tailings that include asphaltenes
Grant 7,998,342 - Duyvesteyn , et al. August 16, 2 | 2011-08-16 |
Methods For Extracting Bitumen From Bituminous Material
App 20110180459 - Duyvesteyn; Willem P.C. ; et al. | 2011-07-28 |
Methods For Preparing Solid Hydrocarbons For Cracking
App 20110180454 - Duyvesteyn; Willem P.C. | 2011-07-28 |
System and method of separating bitumen from tar sands
Grant 7,985,333 - Duyvesteyn July 26, 2 | 2011-07-26 |
Methods For Obtaining Bitumen From Bituminous Materials
App 20110155648 - Duyvesteyn; Willem P.C. ; et al. | 2011-06-30 |
System And Method For Recovering Boron Values From Plant Tailings
App 20110097254 - Duyvesteyn; Willem P. C. | 2011-04-28 |
Nozzle reactor and method of use
Grant 7,927,565 - Duyvesteyn , et al. April 19, 2 | 2011-04-19 |
Systems And Methods For Processing Nozzle Reactor Pitch
App 20110084000 - Duyvesteyn; Willem P.C. ; et al. | 2011-04-14 |
Fragmentation of heavy hydrocarbons using an ozone-containing fragmentation fluid
Grant 7,909,985 - Hong , et al. March 22, 2 | 2011-03-22 |
Method for obtaining bitumen from tar sands
Grant 7,909,989 - Duyvesteyn , et al. March 22, 2 | 2011-03-22 |
Methods For Obtaining Bitumen From Bituminous Materials
App 20110062057 - Duyvesteyn; Willem P.C. | 2011-03-17 |
System And Method For Converting Material Comprising Bitumen Into Light Hydrocarbon Liquid Product
App 20110017642 - Duyvesteyn; Willem P.C. | 2011-01-27 |
Oxidation Of Asphaltenes
App 20100320118 - Duyvesteyn; Willem P.C. ; et al. | 2010-12-23 |
Biodiesel production and use in oil sands processing
Grant 7,824,453 - Duyvesteyn November 2, 2 | 2010-11-02 |
Nozzle Reactor And Method Of Use
App 20100264062 - Duyvesteyn; Willem P.C. | 2010-10-21 |
Oxidation of asphaltenes
Grant 7,811,444 - Duyvesteyn , et al. October 12, 2 | 2010-10-12 |
Methods For Obtaining Bitumen From Bituminous Materials
App 20100032348 - Duyvesteyn; Willem P.C. ; et al. | 2010-02-11 |
Dry,stackable Tailings And Methods For Producing The Same
App 20090301937 - Duyvesteyn; Willem P.C. ; et al. | 2009-12-10 |
Nozzle Reactor And Method Of Use
App 20090266741 - Duyvesteyn; Willem P.C. ; et al. | 2009-10-29 |
Processing asphaltene-containing tailings
Grant 7,585,407 - Duyvesteyn , et al. September 8, 2 | 2009-09-08 |
Processing Asphaltene-containing Tailings
App 20090173668 - Duyvesteyn; Willem P.C. ; et al. | 2009-07-09 |
Processing Asphaltene-containing Tailings
App 20090175769 - Duyvesteyn; Willem P.C. ; et al. | 2009-07-09 |
System And Method Of Separating Bitumen From Tar Sands
App 20080210602 - Duyvesteyn; Willem PC | 2008-09-04 |
Separation Of Tailings That Include Asphaltenes
App 20080156702 - Duyvesteyn; Willem P.C. | 2008-07-03 |
Biodiesel production and use in oil sands processing
App 20080060257 - Duyvesteyn; Willem P. C. | 2008-03-13 |
Oxidation of asphaltenes
App 20070284283 - Duyvesteyn; Willem P. C. ; et al. | 2007-12-13 |
Processing asphaltene-containing tailings
App 20070209971 - Duyvesteyn; Willem P.C. ; et al. | 2007-09-13 |
Method for obtaining bitumen from tar sands
App 20060076274 - Duyvesteyn; Willem P.C. ; et al. | 2006-04-13 |
Processing aqueous titanium chloride solutions to ultrafine titanium dioxide
Grant 6,440,383 - Duyvesteyn , et al. August 27, 2 | 2002-08-27 |
Processing titaniferous ore to titanium dioxide pigment
Grant 6,375,923 - Duyvesteyn , et al. April 23, 2 | 2002-04-23 |
Resin-in-pulp method for recovery of nickel and cobalt
Grant 6,350,420 - Duyvesteyn , et al. February 26, 2 | 2002-02-26 |
Heap leaching of nickel containing ore
Grant 6,312,500 - Duyvesteyn , et al. November 6, 2 | 2001-11-06 |
Recovery Of Nickel And Cobalt From Ore
App 20010001650 - DUYVESTEYN, WILLEM P. C. ; et al. | 2001-05-24 |
Biochemical treatment of bitumen froth tailings
Grant 6,074,558 - Duyvesteyn , et al. June 13, 2 | 2000-06-13 |
Extraction of bitumen from bitumen froth and biotreatment of bitumen froth tailings generated from tar sands
Grant 5,968,349 - Duyvesteyn , et al. October 19, 1 | 1999-10-19 |
Hydrometallurgical process for producing zinc oxide
Grant 5,441,712 - Duyvesteyn , et al. August 15, 1 | 1995-08-15 |
Recovery of base materials from geothermal brines
Grant 5,229,003 - Duyvesteyn July 20, 1 | 1993-07-20 |
Mixed lixiviant for separate recovery of zinc and lead from iron-containing waste materials
Grant 4,614,543 - Duyvesteyn , et al. * September 30, 1 | 1986-09-30 |
Process for metal recovery from steel plant dust
Grant 4,610,722 - Duyvesteyn , et al. September 9, 1 | 1986-09-09 |
Acid leaching of nickeliferous oxide ores with minimized scaling
Grant 4,098,870 - Fekete , et al. July 4, 1 | 1978-07-04 |
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