Patents by Inventor Lawrence D. May

Lawrence D. May has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • SYSTEMS AND METHODS FOR METAL RECOVERY
    Publication number: 20190177864
    Abstract: Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.
    Type: Application
    Filed: February 12, 2019
    Publication date: June 13, 2019
    Applicant: FREEPORT MINERALS CORPORATION
    Inventors: Joanna M. Robertson, Thomas R. Bolles, Wayne W. Hazen, Lawrence D. May, Jay C. Smith, David R. Baughman
  • Systems and methods for copper recovery via roasting and leaching
    Patent number: 10246789
    Abstract: Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: April 2, 2019
    Assignee: FREEPORT MINERALS CORPORATION
    Inventors: Joanna M Robertson, Thomas R Bolles, Wayne W Hazen, Lawrence D May, Jay C Smith, David R Baughman
  • SYSTEMS AND METHODS FOR METAL RECOVERY
    Publication number: 20160230296
    Abstract: Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.
    Type: Application
    Filed: April 15, 2016
    Publication date: August 11, 2016
    Applicant: FREEPORT MINERALS CORPORATION
    Inventors: Joanna M. Robertson, Thomas R. Bolles, Wayne W. Hazen, Lawrence D. May, Jay C. Smith, David R. Baughman
  • Systems and methods for metal recovery
    Patent number: 9340849
    Abstract: Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, and leaching the roasted metal bearing material in a basic medium to yield a pregnant leach solution.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: May 17, 2016
    Assignee: FREEPORT MINERALS CORPORATION
    Inventors: Joanna M Robertson, Thomas R Bolles, Wayne W Hazen, Lawrence D May, Jay C Smith, David R Baughman
  • Systems and methods for metal recovery
    Patent number: 8920773
    Abstract: Various embodiments provide a process roasting a metal bearing material under oxidizing conditions to produce an oxidized metal bearing material, roasting the oxidized metal bearing material under reducing conditions to produce a roasted metal bearing material, leaching the roasted metal hearing material in a basic medium to yield a pregnant leach solution, conditioning the pregnant leach solution to thrill a preprocessed metal bearing material; and leaching the preprocessed metal bearing material in acid medium.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: December 30, 2014
    Assignee: Freeport Minerals Corporation
    Inventors: Joanna M. Robertson, Thomas R. Bolles, Wayne W. Hazen, Lawrence D. May, Jay C. Smith, David R. Baughman