Inventor
ROBERTSON JOANNA M
US34 patents
⚠️ This page may combine multiple inventors who share the name “ROBERTSON JOANNA M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PHELPS DODGE CORP
17 patentsUS6451088B1Sep 17, 2002
Method for improving metals recovery using high temperature leaching
PHELPS DODGE CORP34 citations96
US7517384B2Apr 14, 2009
Method for improving metals recovery using high temperature pressure leaching
PHELPS DODGE CORP11 citations92
US7341700B2Mar 11, 2008
Method for recovery of metals from metal-containing materials using medium temperature pressure leaching
PHELPS DODGE CORP23 citations92
US7125436B2Oct 24, 2006
Method for improving metals recovery using high temperature pressure leaching
PHELPS DODGE CORP13 citations92
US6972107B2Dec 6, 2005
System for direct electrowinning of copper
PHELPS DODGE CORP20 citations92
US6893482B2May 17, 2005
Method for improving metals recovery using high temperature pressure leaching
PHELPS DODGE CORP14 citations92
US6680034B2Jan 20, 2004
Method for recovering metal values from metal-containing materials using high temperature pressure leaching
PHELPS DODGE CORP22 citations92
US6663689B2Dec 16, 2003
Process for direct electrowinning of copper
PHELPS DODGE CORP17 citations92
US6626979B2Sep 30, 2003
Method for improving metals recovery using high temperature pressure leaching
PHELPS DODGE CORP23 citations92
US6451089B1Sep 17, 2002
Process for direct electrowinning of copper
PHELPS DODGE CORP24 citations92
US7485216B2Feb 3, 2009
Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solvent/solution extraction
PHELPS DODGE CORP14 citations83
US7476308B2Jan 13, 2009
Process for multiple stage direct electrowinning of copper
PHELPS DODGE CORP11 citations83
US7462272B2Dec 9, 2008
Process for multiple stage direct electrowinning of copper
PHELPS DODGE CORP9 citations83
US7473413B2Jan 6, 2009
Method for recovering metal values from metal-containing materials using high temperature pressure leaching
PHELPS DODGE CORP6 citations74
US7041152B2May 9, 2006
Method for processing elemental sulfur-bearing materials using high temperature pressure leaching
PHELPS DODGE CORP6 citations74
US6890371B2May 10, 2005
Method for processing elemental sulfur-bearing materials using high temperature pressure leaching
PHELPS DODGE CORP5 citations74
US6497745B2Dec 24, 2002
Method for processing elemental sulfur-bearing materials using high temperature pressure leaching
PHELPS DODGE CORP12 citations74
FREEPORT MCMORAN CORP
8 patentsUS8012318B2Sep 6, 2011
Process for multiple stage direct electrowinning of copper
FREEPORT MCMORAN CORP8 citations83
US8920773B2Dec 30, 2014
Systems and methods for metal recovery
FREEPORT MCMORAN CORP4 citations82
US7666371B2Feb 23, 2010
Method for recovering metal values from metal-containing materials using high temperature pressure leaching
FREEPORT MCMORAN CORP6 citations74
US7722756B2May 25, 2010
Process for multiple stage direct electrowinning of copper
FREEPORT MCMORAN CORP5 citations73
US7736488B2Jun 15, 2010
Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solvent/solution extraction
FREEPORT MCMORAN CORP6 citations72
US9187803B2Nov 17, 2015
Systems and methods for improved metal recovery using ammonia leaching
FREEPORT MCMORAN CORP3 citations61
US9340849B2May 17, 2016
Systems and methods for metal recovery
FREEPORT MCMORAN CORP0 citations50
US9175366B2Nov 3, 2015
Systems and methods for improved metal recovery using ammonia leaching
FREEPORT MCMORAN CORP1 citations50
FREEPORT MINERALS CORP
7 patentsUS10767242B2Sep 8, 2020
Methods and systems for leaching a metal-bearing ore using a bio-augmentation process
FREEPORT MINERALS CORP2 citations66
US10370738B2Aug 6, 2019
Methods and systems for leaching a metal-bearing ore
FREEPORT MINERALS CORP3 citations66
US12492445B2Dec 9, 2025
Systems and methods for subsurface metal recovery
FREEPORT MINERALS CORP0 citations60
US10662502B2May 26, 2020
Systems and methods for improved metal recovery using ammonia leaching
FREEPORT MINERALS CORP0 citations50
US10246789B2Apr 2, 2019
Systems and methods for copper recovery via roasting and leaching
FREEPORT MINERALS CORP0 citations50
US10006133B2Jun 26, 2018
Systems and methods for improved metal recovery using ammonia leaching
FREEPORT MINERALS CORP0 citations50
US12378634B2Aug 5, 2025
Systems and methods for improved raffinate injection
FREEPORT MINERALS CORP0 citations49