Patents by Inventor Young Re Cho

Young Re Cho 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).

  • Leadless free-cutting copper alloy and method for producing the same
    Patent number: 9840758
    Abstract: Disclosed is a leadless free-cutting copper alloy that exhibits superior machinability, cold workability and dezincification resistance and a method for producing the same. The leadless free-cutting copper alloy comprises 56 to 77% by weight of copper (Cu), 0.1 to 3.0% by weight of manganese (Mn), 1.5 to 3.5% by weight of silicon (Si), and the balance of zinc (Zn) and other inevitable impurities, thus exhibiting superior eco-friendliness, machinability, cold workability and dezincification resistance.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: December 12, 2017
    Assignee: POONGSAN CORPORATION
    Inventors: Beum Jae Lee, Won Hone Kim, Cheol Min Park, Young Re Cho, Min Jae Jeong
  • LEADLESS FREE-CUTTING COPPER ALLOY AND METHOD FOR PRODUCING THE SAME
    Publication number: 20140248175
    Abstract: Disclosed is a leadless free-cutting copper alloy that exhibits superior machinability, cold workability and dezincification resistance and a method for producing the same. The leadless free-cutting copper alloy comprises 56 to 77% by weight of copper (Cu), 0.1 to 3.0% by weight of manganese (Mn), 1.5 to 3.5% by weight of silicon (Si), and the balance of zinc (Zn) and other inevitable impurities, thus exhibiting superior eco-friendliness, machinability, cold workability and dezincification resistance.
    Type: Application
    Filed: July 31, 2012
    Publication date: September 4, 2014
    Applicant: POONGSAN CORPORATION
    Inventors: Beum Jae Lee, Won Hone Kim, Cheol Min Park, Young Re Cho, Min Jae Jeong