Patents by Inventor Mitsuharu Eikyuu

Mitsuharu Eikyuu 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 for polymerization of conjugated diene and method of polymerizing conjugated diene using the catalyst, rubber composition for tires, and rubber composition for golf balls
    Patent number: 8084565
    Abstract: A catalyst for polymerization of conjugated diene is provided, which facilitates manufacture of a conjugated diene polymer with a high 1,4-cis structure content, leaves less aluminum residue on polymerization, and has high activity. A method of manufacturing conjugated diene polymers using the catalyst is also provided. A catalyst for polymerization of conjugated diene comprises (A) an yttrium compound; (B) an ionic compound including a non-coordinate anion and a cation; and (C) an organometallic compound including an element selected from the groups 2, 12 and 13 of the periodic table.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: December 27, 2011
    Assignee: Ube Industries, Ltd.
    Inventors: Michinori Suzuki, Masato Murakami, Naomi Okamoto, Mitsuharu Eikyuu, Kouji Ishiguchi
  • Catalyst for polymerization of conjugated diene and method of polymerization conjugated diene using the catalyst, rubber composition for tires, and rubber composition for golf balls
    Patent number: 7799725
    Abstract: A catalyst for polymerization of conjugated diene comprises (A) an yttrium compound; (B) an ionic compound including a non-coordinate anion and a cation; and (C) an organometallic compound including an element selected from the groups 2, 12 and 13 of the periodic table.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: September 21, 2010
    Assignee: UBE Industries, Ltd.
    Inventors: Michinori Suzuki, Masato Murakami, Naomi Okamoto, Mitsuharu Eikyuu, Kouji Ishiguchi
  • CATALYST FOR POLYMERIZATION OF CONJUGATED DIENE AND METHOD OF POLYMERIZING CONJUGATED DIENE USING THE CATALYST, RUBBER COMPOSITION FOR TIRES, AND RUBBER COMPOSITION FOR GOLF BALLS
    Publication number: 20100113676
    Abstract: [Subject] A catalyst for polymerization of conjugated diene is provided, which facilitates manufacture of a conjugated diene polymer with a high 1,4-cis structure content, leaves less aluminum residue on polymerization, and has high activity. A method of manufacturing conjugated diene polymers using the catalyst is also provided. [Solution] A catalyst for polymerization of conjugated diene comprises (A) an yttrium compound; (B) an ionic compound including a non-coordinate anion and a cation; and (C) an organometallic compound including an element selected from the groups 2, 12 and 13 of the periodic table.
    Type: Application
    Filed: January 11, 2010
    Publication date: May 6, 2010
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Michinori Suzuki, Masato Murakami, Naomi Okamoto, Mitsuharu Eikyuu, Kouji Ishiguchi
  • CATALYST FOR POLYMERIZATION OF CONJUGATED DIENE AND METHOD OF POLYMERIZATION CONJUGATED DIENE USING THE CATALYST, RUBBER COMPOSITION FOR TIRES, AND RUBBER COMPOSITION FOR GOLF BALLS
    Publication number: 20090105401
    Abstract: [Subject] a catalyst for polymerization of conjugated diene is provided, which facilitates manufacture of a conjugated diene polymer with a high 1,4-cis structure content, leaves less aluminum residue on polymerization, and has high activity. A method of manufacturing conjugated diene polymers using the catalyst is also provided. [Solution] A catalyst for polymerization of conjugated diene comprises (A) an yttrium compound; (B) an ionic compound including a non-coordinate anion and a cation; and (C) an organometallic compound including an element selected from the groups 2, 12 and 13 of the periodic table.
    Type: Application
    Filed: October 20, 2005
    Publication date: April 23, 2009
    Inventors: Michinori Suzuki, Masato Murakami, Naomi Okamoto, Mitsuharu Eikyuu, Kouji Ishiguchi