Patents by Inventor Young Sun Uh

Young Sun Uh 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 highly pure copper oxide from waste etchant
    Patent number: 6649131
    Abstract: A method for recycling copper oxide includes: a first step in which a sodium hydroxide aqueous solution is added to acidic copper chloride waste etchant produced in the PCB industry, to obtain copper hydroxide slurry; and a second step in which the slurry obtained in the first step is heated and sintered to thereby prepare a needle-form copper oxide. Since copper oxide has a purity of more than 99.0 wt % and the needle-form crystal morphology, so that it has an excellent filtering ability and homogeneous particle size distribution.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: November 18, 2003
    Assignee: Myung Jin Chemical Co., Ltd.
    Inventors: Kyu Bum Seo, Young Sun Uh, Young Hee Kim, Jung Yoon Han, Sun Jin Kim, Myung Hun Kim
  • Preparation of highly pure copper oxide from waste etchant
    Publication number: 20010051103
    Abstract: A method for recycling copper oxide includes: a first step in which a sodium hydroxide aqueous solution is added to acidic copper chloride waste etchant produced in the PCB industry, to obtain copper hydroxide slurry; and a second step in which the slurry obtained in the first step is heated and sintered to thereby prepare a needle-form copper oxide. Since copper oxide has a purity of more than 99.0 wt % and the needle-form crystal morphology, so that it has an excellent filtering ability and homogeneous particle size distribution.
    Type: Application
    Filed: January 24, 2001
    Publication date: December 13, 2001
    Inventors: Kyu Bum Seo, Young Sun Uh, Young Hee Kim, Jung Yoon Han, Sun Jin Kim, Myung Hun Kim