Patents by Inventor Jai H. Kyung

Jai H. Kyung 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).

  • Preparation of menthane diisocyanate by addition of isocyanic acid to terpinyl monoisocyanates
    Patent number: 4618707
    Abstract: A process for preparing menthane diisocyanate by reaction of a terpinyl monoisocyanate with isocyanic acid in a medium which is an excess of isocyanic acid, a polar solvent, or a mixture of solvents which includes a polar solvent in the presence of a catalyst which is a Bronsted acid or a Lewis acid is disclosed.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: October 21, 1986
    Assignee: Ashland Oil, Inc.
    Inventors: Robert A. Grimm, Jai H. Kyung, Phyllis L. Brusky, Joseph G. Holehouse, Biau-hung Chang
  • Production of isocyanic acid
    Patent number: 4372934
    Abstract: Isocyanic acid is formed directly from nitric oxide, carbon monoxide and hydrogen by contacting a supported bifunctional iridium or rhodium metal catalyst at an elevated temperature with a feed stream of said reactants.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: February 8, 1983
    Assignee: Ashland Oil, Inc.
    Inventors: Jai H. Kyung, Phyllis L. Brusky
  • Production of isocyanic acid
    Patent number: 4372933
    Abstract: Isocyanic acid is formed directly from nitric oxide, carbon monoxide and hydrogen by contacting a supported iridium or rhodium metal catalyst at an elevated temperature with a feed stream of said reactants.
    Type: Grant
    Filed: April 29, 1982
    Date of Patent: February 8, 1983
    Assignee: Ashland Oil, Inc.
    Inventors: Jai H. Kyung, Joseph G. Holehouse
  • Aromatic isocyanate preparation
    Patent number: 4353841
    Abstract: An aromatic isocyanate is formed directly from an aromatic hydrocarbon, nitric oxide and carbon monoxide by contacting a Group VII or Group VIII metal catalyst at a temperature between 350.degree. and 550.degree. C. with a feed stream of said reactants.
    Type: Grant
    Filed: February 19, 1982
    Date of Patent: October 12, 1982
    Assignee: Ashland Oil, Inc.
    Inventors: Jai H. Kyung, Robert A. Grimm, Joseph G. Holehouse
  • Liquid-liquid extraction of Cu, Co, Ni from ammoniacal solutions with 7-ethyl-undeca-2,4-dione
    Patent number: 4205048
    Abstract: 7-Ethyl-undeca-2,4-dione as a chelation collector for the liquid-liquid extraction of transition metals from dilute ammoniacal leach solutions thereof exhibits the combination of requisite physical and dynamic properties marking an industrially attractive reagent for this purpose.
    Type: Grant
    Filed: February 8, 1979
    Date of Patent: May 27, 1980
    Assignee: Sherex Chemical Company, Inc.
    Inventors: Jai H. Kyung, Harvey J. Richards