Patents by Inventor David Matthiesen

David Matthiesen 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).

  • Transformation enabled nitride magnets absent rare earths and a process of making the same
    Patent number: 10867730
    Abstract: A process for producing an ordered martensitic iron nitride powder that is suitable for use as a permanent magnetic material is provided. The process includes fabricating an iron alloy powder having a desired composition and uniformity; nitriding the iron alloy powder by contacting the material with a nitrogen source in a fluidized bed reactor to produce a nitride iron powder; transforming the nitride iron powder to a disordered martensitic phase; annealing the disordered martensitic phase to an ordered martensitic phase; and separating the ordered martensitic phase from the iron nitride powder to yield an ordered martensitic iron nitride powder.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: December 15, 2020
    Assignee: Case Western Reserve University
    Inventor: David Matthiesen
  • TRANSFORMATION ENABLED NITRIDE MAGNETS ABSENT RARE EARTHS AND A PROCESS OF MAKING THE SAME
    Publication number: 20180301259
    Abstract: A process for producing an ordered martensitic iron nitride powder that is suitable for use as a permanent magnetic material is provided. The process includes fabricating an iron alloy powder having a desired composition and uniformity; nitriding the iron alloy powder by contacting the material with a nitrogen source in a fluidized bed reactor to produce a nitride iron powder; transforming the nitride iron powder to a disordered martensitic phase; annealing the disordered martensitic phase to an ordered martensitic phase; and separating the ordered martensitic phase from the iron nitride powder to yield an ordered martensitic iron nitride powder.
    Type: Application
    Filed: May 8, 2018
    Publication date: October 18, 2018
    Inventor: David Matthiesen
  • Transformation enabled nitride magnets absent rare earths and a process of making the same
    Patent number: 9997285
    Abstract: A process for producing an ordered martensitic iron nitride powder that is suitable for use as a permanent magnetic material is provided. The process includes fabricating an iron alloy powder having a desired composition and uniformity; nitriding the iron alloy powder by contacting the material with a nitrogen source in a fluidized bed reactor to produce a nitride iron powder; transforming the nitride iron powder to a disordered martensitic phase; annealing the disordered martensitic phase to an ordered martensitic phase; and separating the ordered martensitic phase from the iron nitride powder to yield an ordered martensitic iron nitride powder.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: June 12, 2018
    Assignee: Case Western Reserve University
    Inventor: David Matthiesen
  • Transformation Enabled Nitride Magnets Absent Rare Earths and a Process of Making the Same
    Publication number: 20140290434
    Abstract: A process for producing an ordered martensitic iron nitride powder that is suitable for use as a permanent magnetic material is provided. The process includes fabricating an iron alloy powder having a desired composition and uniformity; nitriding the iron alloy powder by contacting the material with a nitrogen source in a fluidized bed reactor to produce a nitride iron powder; transforming the nitride iron powder to a disordered martensitic phase; annealing the disordered martensitic phase to an ordered martensitic phase; and separating the ordered martensitic phase from the iron nitride powder to yield an ordered martensitic iron nitride powder.
    Type: Application
    Filed: June 13, 2014
    Publication date: October 2, 2014
    Inventor: David Matthiesen