Patents by Inventor Kun Yu Park

Kun Yu Park 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).

  • Method for preparing cycloaliphatic diamines from aromatic diamines
    Patent number: 6075167
    Abstract: This invention relates to a method for preparing cycloaliphatic diamines by hydrogenating aromatic diamines in the presence of a supported ruthenium catalyst and a metal nitrite as a catalyst promoter to increase the rate of the hydrogenation reaction and decrease the amount of higher boiler by-products.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: June 13, 2000
    Assignee: Korea Institute of Science and Technology
    Inventors: Hoon Sik Kim, Kun Yu Park, Young Soo Kwon, Moon Jo Chung, Byung Gwon Lee