Patents by Inventor Shin-ichi Kumamoto

Shin-ichi Kumamoto 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).

  • Solid catalyst component and catalyst for olefin polymerization, and method for producing olefin polymer
    Publication number: 20010021687
    Abstract: A solid catalyst component for olefin polymerization obtained by contacting a titanium compound having a titanium-halogen bond and an ester compound simultaneously, or a mixture of a titanium compound (A) having a titanium-halogen bond and an ester compound (B), with a solid catalyst component precursor (C) containing a magnesium atom, a titanium atom and a hydrocarbyloxy group.
    Type: Application
    Filed: May 10, 2001
    Publication date: September 13, 2001
    Inventors: Shin-Ichi Kumamoto, Eiji Nakaishi, Makato Satoh
  • Aluminum compound-containing solid catalyst component, catalyst for olefin polymerization and method for producing olefin polymer
    Patent number: 6100213
    Abstract: Described are an aluminum compound-containing solid catalyst component obtained by bringing a carrier into contact with an organoaluminumoxy compound, followed by bringing this product into contact with a compound having an electron attractive group; a transition metal-containing solid catalyst component obtained by bringing the aluminum compound-containing solid catalyst component into contact with a transition metal compound; a catalyst for olefin polymerization, constituting the aluminum compound-containing solid catalyst component and an organoaluminum compound; and a method for producing an olefin polymer, which includes polymerizing or copolymerizing an olefim using the catalyst for olefin polymerization.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: August 8, 2000
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shin-ichi Kumamoto, Hiroaki Katayama, Akio Imai