Patents by Inventor Glen H. Ko

Glen H. Ko 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 of estimating gel content of propylene block copolymer
    Patent number: 6466875
    Abstract: A concentration distribution of a rubber component in block copolymer particles is computed based on the operating conditions of a polymerization apparatus, a growth model equation of polymer particles on a solid catalyst component, and a residence time distribution of the particles in each of a homopolymerization stage and a copolymerization stage, and the gel content of the block copolymer is estimated based on the computation. The gel content of a propylene block copolymer can thereby be estimated precisely.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: October 15, 2002
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kenji Mitsutani, Glen H. Ko, Kiyoshi Yukawa, Fuminao Watanabe
  • Propylene block copolymer
    Patent number: 6191232
    Abstract: The present invention provides a propylene block copolymer comprising polymer particles whose rubber-like component contents are 50% by weight or more, in an amount less than 1.0% by weight of the whole polymer particles finally discharged from a polymerization system.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: February 20, 2001
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kenji Mitsutani, Kiyoshi Yukawa, Fumihiko Shimizu, Glen H. Ko, Eiji Tanaka, Fuminao Watanabe