Patents by Inventor Kyungja Woo

Kyungja Woo 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).

  • Process for preparing crystalline barium titanate powder
    Patent number: 6409983
    Abstract: The present invention provides a process of preparing barium titanate powders having fine particle morphology and superior crystallinity, by preparing a sol precursor by using a titanium acylate and a barium compound, spraying the sol precursor in a strong alkaline solution for coprecipitation, crystallizing the barium titanate with an optional hydrothermal reaction, and purifying the barium titanate powder by washing.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: June 25, 2002
    Assignee: Korea Institute of Science and Technology
    Inventors: Guang Jin Choi, Kyungja Woo, Young Sang Cho, Sang Jun Sim, Young Dae Kim, Sang Kyun Lee