Patents by Inventor Han-Seock Cho

Han-Seock 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).

  • Patent number: 6943225
    Abstract: The present invention relates to a multinuclear metallocene catalyst for olefin polymerization and a process for olefin polymerization using the same, in which the multinuclear metallocene catalyst for olefin polymerization comprises, as a main catalyst, a transition metal compound that contains at least two metal atoms in the groups III to X of the periodic table as central metals and a ligand having a cyclopentadienyl structure bridging between the two metal atoms, and, as a cocatalyst, an aluminoxane compound, an organoaluminum compound or a bulky compound reactive to the transition metal compound to impart a catalytic activity to the transition metal compound.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: September 13, 2005
    Assignee: Honam Petrochemical Corporation
    Inventors: Min-Hyung Lee, Sung-Jin Park, Seong-Kyun Kim, Young-Jo Kim, Yong-Gyu Han, Young-Kyu Do, Ki-Ho Choi, Seung-Woong Yoon, Bo-Geun Song, Han-Seock Cho
  • Publication number: 20040072677
    Abstract: The present invention relates to a multinuclear metallocene catalyst for olefin polymerization and a process for olefin polymerization using the same, in which the multinuclear metallocene catalyst for olefin polymerization comprises, as a main catalyst, a transition metal compound that contains at least two metal atoms in the groups III to X of the periodic table as central metals and a ligand having a cyclopentadienyl structure bridging between the two metal atoms, and, as a cocatalyst, an aluminoxane compound, an organoaluminum compound or a bulky compound reactive to the transition metal compound to impart a catalytic activity to the transition metal compound.
    Type: Application
    Filed: July 29, 2003
    Publication date: April 15, 2004
    Inventors: Min-Hyung Lee, Sung-Jin Park, Seong-Kyun Kim, Young-Jo Kim, Yong-Gyu Han, Young-Kyu Do, Ki-Ho Choi, Seung-Woong Yoon, Bo-Geun Song, Han-Seock Cho