Patents by Inventor Gregory D. Lindahl

Gregory D. Lindahl 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).

  • Ore beneficiation
    Patent number: 8834593
    Abstract: A method of enriching the iron content of low grade iron ore bearing materials has been developed which produces a high iron ore concentrate suitable for processing into pig iron and steel. The process includes reducing the low grade iron ore bearing materials to a fine particulate form and treating a water slurry of this material by applying a combination of ultrasonic treatments in a plurality of high and low intensity magnetic separation operations to remove interfering materials and concentrate magnetic and paramagnetic iron bearing materials into a high grade ore stock.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: September 16, 2014
    Assignee: Superior Mineral Resources LLC
    Inventors: Howard W. Hilshorst, Gregory D. Lindahl, James A. Hecimovich
  • Ore beneficiation
    Patent number: 8741023
    Abstract: A method of enriching the iron content of low-grade iron-bearing ore materials has been developed which produces a high iron ore concentrate suitable for processing into pig iron and steel. The process includes reducing the low-grade iron-bearing ore materials to a fine particulate form and treating a water slurry of this material by applying a combination of ultrasonic treatments in a plurality of high and low intensity magnetic separation operations to remove interfering materials and concentrate magnetic and paramagnetic iron-bearing materials into a high-grade ore stock.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: June 3, 2014
    Assignee: Superior Mineral Resources LLC
    Inventors: Howard W. Hilshorst, Gregory D. Lindahl, James A. Hecimovich
  • ORE BENEFICIATION
    Publication number: 20140033867
    Abstract: A method of enriching the iron content of low grade iron ore bearing materials has been developed which produces a high iron ore concentrate suitable for processing into pig iron and steel. The process includes reducing the low grade iron ore bearing materials to a fine particulate form and treating a water slurry of this material by applying a combination of ultrasonic treatments in a plurality of high and low intensity magnetic separation operations to remove interfering materials and concentrate magnetic and paramagnetic iron bearing materials into a high grade ore stock.
    Type: Application
    Filed: September 27, 2013
    Publication date: February 6, 2014
    Applicant: Superior Mineral Resources LLC
    Inventors: Howard W. Hilshorst, Gregory D. Lindahl, James A. Hecimovich
  • Ore beneficiation
    Patent number: 8545594
    Abstract: A method of enriching the iron content of low grade iron ore bearing materials has been developed which produces a high iron ore concentrate suitable for processing into pig iron and steel. The process includes reducing the low grade iron ore bearing materials to a fine particulate form and treating a water slurry of this material by applying a combination of ultrasonic treatments in a plurality of high and low intensity magnetic separation operations to remove interfering materials and concentrate magnetic and paramagnetic iron bearing materials into a high grade ore stock.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: October 1, 2013
    Assignee: Superior Mineral Resources LLC
    Inventors: Howard W. Hilshorst, Gregory D. Lindahl, James A. Hecimovich
  • Ore Beneficiation
    Publication number: 20130032003
    Abstract: A method of enriching the iron content of low grade iron ore bearing materials has been developed which produces a high iron ore concentrate suitable for processing into pig iron and steel. The process includes reducing the low grade iron ore bearing materials to a fine particulate form and treating a water slurry of this material by applying a combination of ultrasonic treatments in a plurality of high and low intensity magnetic separation operations to remove interfering materials and concentrate magnetic and paramagnetic iron bearing materials into a high grade ore stock.
    Type: Application
    Filed: August 1, 2011
    Publication date: February 7, 2013
    Applicant: SUPERIOR MINERAL RESOURCES LLC
    Inventors: Howard W. Hilshorst, Gregory D. Lindahl, James A. Hecimovich
  • ORE BENEFICIATION
    Publication number: 20130032004
    Abstract: A method of enriching the iron content of low-grade iron-bearing ore materials has been developed which produces a high iron ore concentrate suitable for processing into pig iron and steel. The process includes reducing the low-grade iron-bearing ore materials to a fine particulate form and treating a water slurry of this material by applying a combination of ultrasonic treatments in a plurality of high and low intensity magnetic separation operations to remove interfering materials and concentrate magnetic and paramagnetic iron-bearing materials into a high-grade ore stock.
    Type: Application
    Filed: July 27, 2012
    Publication date: February 7, 2013
    Applicant: Superior Mineral Resources LLC
    Inventors: Howard W. Hilshorst, Gregory D. Lindahl, James A. Hecimovich