Patents by Inventor Yuji Matsudaira

Yuji Matsudaira 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 for producing polybutadiene
    Patent number: 7868103
    Abstract: A method for producing a polybutadiene, which comprises subjecting 1,3-butadiene to cis-1,4 polymerization, and subsequently subjecting a resultant in the resulting polymerization system to syndiotactic-1,2 polymerization, the method being characterized in that there is added, after the polymerization, a halogen acid or halogen acid salt.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: January 11, 2011
    Assignee: Ube Industries, Ltd.
    Inventors: Koji Shiba, Michinori Suzuki, Masato Murakami, Yuji Matsudaira
  • Method for producing polybutadiene
    Publication number: 20090143548
    Abstract: A method for producing a polybutadiene, which comprises subjecting 1,3-butadiene to cis-1,4 polymerization, and subsequently subjecting a resultant in the resulting polymerization system to syndiotactic-1,2 polymerization, the method being characterized in that there is added, after the polymerization, a halogen acid or halogen acid salt.
    Type: Application
    Filed: May 17, 2007
    Publication date: June 4, 2009
    Inventors: Koji Shiba, Michinori Suzuki, Masato Murakami, Yuji Matsudaira