Patents by Inventor Jun S. Im

Jun S. Im 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).

  • Patent number: 5403408
    Abstract: A permanent magnet material having the formula, in atomic %:TM.sub.(84.3.-w-z) RE.sub.(3.0+w) B.sub.(12.7+z),wherein -3.3.ltoreq.z<3.3 and -2.0.ltoreq.w<2.0; orTM.sub.(89.8-x-y) RE.sub.(3.5+y) B.sub.(6.7+x),wherein -2.5.ltoreq.y<2.5 and -2.7.ltoreq.x.ltoreq.2.7; orTM.sub.(96.5-q-r) RE.sub.(1+q) B.sub.(2.5+r),wherein -1.5.ltoreq.r.ltoreq.1.5 and 0.ltoreq.q<6.5-r; and wherein TM is a transition metal, RE is a rare earth metal, and B is boron or a combination of boron and carbon. The permanent magnet materials include at least weight percent non-uniaxial material and possess a coercivity of at least 1,000 Oersteds.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: April 4, 1995
    Assignee: Inland Steel Company
    Inventors: Robert F. Krause, John Keem, Jun S. Im, Su Cronogue
  • Patent number: 5116434
    Abstract: Disclosed is a method for forming a high magnetic parameter ferromagnetic material. The material has a distribution of magnetic parameters as solidified, and is separated into a first fraction having relatively high magnetic parameters and a second fraction having relatively low magnetic parameters. The method comprises applying a magnetic field to the materials, the magnetic field being high enough to magnetize the low magnetic parameter fraction, but low enough to avoid substantially magnetization of the high parameter fraction. Thereafter the fractions of material are magnetically separated.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: May 26, 1992
    Assignee: Ovonic Synthetic Materials Company, Inc.
    Inventors: John Keem, Jun S. Im
  • Patent number: 4867785
    Abstract: Disclosed is a controlled pressure melt spinning method of rapidly solidifying alloys to obtain a solid alloy of controlled mean crystallite size, narrow crystallite distribution, and a fine grain microstructure.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: September 19, 1989
    Assignee: Ovonic Synthetic Materials Company, Inc.
    Inventors: John Keem, Jun S. Im, John Tyler, Richard Bergeron, Kevin Dennis, David Hoeft
  • Patent number: 4834811
    Abstract: Disclosed is a method for separating initially non-magnetized ferromagnetic material. The material has a distribution of magnetic parameters, and is separated into a first fraction having relatively high magnetic parameters and a second fraction having relatively low magnetic parameters. The method comprises applying a magnetic field to the materials, the magnetic field being high enough to magnetize the low magnetic parameter fraction, but low enough to avoid substantial magnetization of the high parameter fraction. Thereafter the fractions of material are magnetically separated.
    Type: Grant
    Filed: June 19, 1987
    Date of Patent: May 30, 1989
    Assignee: Ovonic Synthetic Materials Company
    Inventors: John Keem, Jun S. Im
  • Patent number: 4773717
    Abstract: Disclosed is a coated article, for example an architectural transparency, or a vehicular transparency, or a reflecting article, as a decorative article. The article has a substrate, e.g., a substantially transparent substrate. The substrate has an optical coating on a surface thereof. The coating is a bilayer dielectric thin film having a thickness corresponding to a constructively interfering function of a wavelength of interest. The bilayer thin film is a metallic layer, which serves as an adhesion layer, with a dielectric atop the metallic layer which is a compound of the metal forming the metallic layer.
    Type: Grant
    Filed: November 3, 1986
    Date of Patent: September 27, 1988
    Assignee: Ovonic Synthetic Materials Co.
    Inventors: Purnachandra Pai, Jun S. Im, John Piner