Patents by Inventor Takuya Ohgane

Takuya Ohgane 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).

  • Modified particles, carrier prepared therefrom, olefin polymerization catalyst component prepared therefrom, olefin polymerization catalyst prepared therefrom, and process for preparing olefin polymer
    Patent number: 6482765
    Abstract: Modified particles obtained by contacting dry particles(a) with an organometallic compound(b), and subsequently a compound(c) having a functional group containing active hydrogen or a non-proton donative Lewis basic functional group and an electron attractive group; a carrier comprising said particles; a catalyst component for olefin polymerization comprising said particles; a catalyst for olefin polymerization comprising said particles(A) and a transition metal compound(B), or an additional organometallic compound (C) therewith; and a method for producing an olefin polymer with said catalyst for olefin polymerization. According to the present invention, there is provided a catalyst for polymerizing an olefin giving an olefin polymer excellent in particle properties with a high activity when applied to a slurry polymerization or gas phase polymerization, and a method for producing a olefin polymer using said catalyst.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: November 19, 2002
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takuya Ohgane, Hideki Sato, Hiroaki Katayama
  • Modified particles, catalyst for olefin polymerization containing the same, and method for producing olefin polymer
    Patent number: 6284699
    Abstract: Modified particles obtained by a process comprising contacting water-containing particles(a), an organometallic compound(b) and a compound(c) having a functional group containing active hydrogen or a non-proton donative Lewis basic functional group, and having an electron attractive group; a carrier of said particles; a catalyst component for olefin polymerization of said particles; a catalyst for olefin polymerization comprising said particles(A) and a transition metal compound(B), and optionally, an organometallic compound (C); and a method for producing an olefin polymer with said catalyst for olefin polymerization.
    Type: Grant
    Filed: March 24, 1999
    Date of Patent: September 4, 2001
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takuya Ohgane, Hideki Sato, Hiroaki Katayama