Patents by Inventor Yun S. Chang

Yun S. Chang 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 manufacturing a vessel for storing radioactive waste
    Patent number: 5082694
    Abstract: This invention relates to a method for manufacturing a vessel for storing radioactive waste, and to a method for manufacturing a vessel which withstands the heat generated by the radioactive waste without deforming and a method for manufacturing the vessel. A method for manufacturing a stainless steel vessel for radioactive waste according to the present invention comprises eliminating impurities on the surface of the stainless steel, stirring copper plating solution while filling the vessel therewith in order to keep the solution at a constant temperature, thereby precipitating the copper and plating the surface of the stainless steel vessel, and then filling the vessel with lead.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: January 21, 1992
    Assignee: Korea Heavy Industries & Construction Co., Ltd.
    Inventors: Yun S. Chang, Dong J. Kim