Patents by Inventor Hye-Jeong Hong

Hye-Jeong Hong 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 single crystalline cerium oxide powders
    Patent number: 7473408
    Abstract: The present invention relates to a method for preparing single crystalline cerium oxide nanopowder capable of easily controlling the shape and granularity of particles. The method includes preparing cerium hydroxide by precipitating a cerium salt in the presence of a solvent mixture of organic solvent and water and hydrothermally reacting the prepared cerium hydroxide. The prepared single crystalline cerium oxide has a particle size of not less than about 30 nm and an excellent degree of dispersion.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: January 6, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Jun-Seok Noh, Tae-Hyun Kwon, Seung-Beom Cho, Hye-Jeong Hong, Dae-Gon Han
  • Method for preparing ?-alumina nano powder
    Patent number: 7115243
    Abstract: The present invention relates to a preparation method of ?-alumina nano powder, and more particularly to a preparation method of ?-alumina nano powder that has a uniform particle shape and size distribution, is capable of being produced at a low temperature, and contains less than 20 ppm of alkali metals such as Na and K. the ?-alumina nano powder is prepared by glycolating aluminium alkoxide in glycol solution containing the ?-iron oxide or ?-alumina nucleation seed and carrying out glyco thermal reaction.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: October 3, 2006
    Assignee: LG Chem, Ltd.
    Inventors: Hye-Jeong Hong, Tae-Hyun Kwon, Seung-Beom Cho, Jun-Seok Nho, Dae-Gon Han
  • Method for preparing of alpha-alumina nano powder
    Publication number: 20050106096
    Abstract: The present invention relates to a preparation method of ?-alumina nano powder, and more particularly to a preparation method of ?-alumina nano powder that has a uniform particle shape and size distribution, is capable of being produced at a low temperature, and contains less than 20 ppm of alkali metals such as Na and K. the ?-alumina nano powder is prepared by glycolating aluminium alkoxide in glycol solution containing the ?-iron oxide or ?-alumina nucleation seed and carrying out glyco thermal reaction.
    Type: Application
    Filed: January 3, 2003
    Publication date: May 19, 2005
    Inventors: Hye-Jeong Hong, Tae-Hyun Kwon, Seung-Beom Cho, Jun-Seok Nho, Dae-Gon Han
  • Method for preparing single crystalline cerium oxide powders
    Publication number: 20040241070
    Abstract: The present Invention relates to a method for preparing single crystalline cerium oxide nanopowder capable of easily controlling the shape and granularity of particles. The method includes preparing cerium hydroxide by precipitating a cerium salt in the presence of a solvent mixture of organic solvent and water and hydrothermally reacting the prepared cerium hydroxide. The prepared single crystalline cerium oxide has a particle size of not less than about 30 nm and an excellent degree of dispersion.
    Type: Application
    Filed: December 30, 2003
    Publication date: December 2, 2004
    Inventors: Jun-Seok Noh, Tae-Hyun Kwon, Seung-Beom Cho, Hye-Jeong Hong, Dae-Gon Han