Patents by Inventor Tsugihiko Hakozaki

Tsugihiko Hakozaki 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).

  • Catalyst component for olefin polymerization catalyst for olefin polymerization, and process for preparing polyolefin
    Patent number: 6303714
    Abstract: The present invention provides an olefin polymerization catalyst component comprising a transition metal compound represented by general formula (1) LmCpnMX1X2  (1) an olefin polymerization catalyst containing the catalyst component as a transition metal component, and a method of producing a polyolefin using the catalyst. According to the present invention, polyolefins having a wide molecular weight distribution and excellent moldability and containing small amounts of low molecular weight components can be produced with high activity.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: October 16, 2001
    Assignee: Japan Polyolefins Co., Ltd.
    Inventors: Nobuyuki Kibino, Kiyotaka Ishida, Tsugihiko Hakozaki, Tsutomu Sakuragi, Shigenobu Miyake, Shintaro Inazawa