Patents by Inventor Kazumasa Mizuno

Kazumasa Mizuno 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 sorting mixed plastic
    Patent number: 8113354
    Abstract: A problem of the invention is to provide a method which targets on polyethylene terephthalate-made bottle scraps composed mainly of polyethylene and/or polypropylene, polystyrene and a polyester and which is able to treat continuously a large amount of the polyester component with a high purity and sort and recover it in a high recovery. The problem of the invention can be solved by a separation method of waste plastics, which is characterized by forming previously a crushed plastic into a water slurry, feeding the water slurry in a fixed rate range such that a swirling flow is generated within a cylindrical tank and that water rises in a fixed rate range and recovering a polyester with a high specific gravity as a precipitated component within the cylindrical tank and a plastic with a low specific gravity as an overflow component from the top of the cylindrical tank, respectively.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: February 14, 2012
    Assignee: Teijin Fibers Limited
    Inventors: Kozo Toida, Kazumasa Mizuno, Minoru Nakashima, Hitoshi Nagasawa
  • METHOD FOR SORTING MIXED PLASTIC
    Publication number: 20090194465
    Abstract: A problem of the invention is to provide a method which targets on polyethylene terephthalate-made bottle scraps composed mainly of polyethylene and/or polypropylene, polystyrene and a polyester and which is able to treat continuously a large amount of the polyester component with a high purity and sort and recover it in a high recovery. The problem of the invention can be solved by a separation method of waste plastics, which is characterized by forming previously a crushed plastic into a water slurry, feeding the water slurry in a fixed rate range such that a swirling flow is generated within a cylindrical tank and that water rises in a fixed rate range and recovering a polyester with a high specific gravity as a precipitated component within the cylindrical tank and a plastic with a low specific gravity as an overflow component from the top of the cylindrical tank, respectively.
    Type: Application
    Filed: June 28, 2007
    Publication date: August 6, 2009
    Inventors: Kozo Toida, Kazumasa Mizuno, Minoru Nakashima, Hitoshi Nagasawa
  • Dimethyl terephthalate composition and process for producing the same
    Patent number: 7078440
    Abstract: A dimethyl terephthalate composition includes 0.001 to 200 ppm of methyl 4-(1,3-dioxolan-2-yl)benzoate and 0 to 1 ppm of dimethyl hydroxyterephthalate contained in dimethyl terephthalate, and exhibits improved properties as a material for producing polyester.
    Type: Grant
    Filed: November 22, 2001
    Date of Patent: July 18, 2006
    Assignee: Teijin Limited
    Inventors: Kenichi Ishihara, Kazumasa Mizuno, Minoru Nakashima, Kazuhiro Sato, Masanori Miyamoto, Taizo Mori
  • Dimethyl terephthalate composition and process for producing the same
    Publication number: 20040054019
    Abstract: A dimethyl terephthalate composition includes 0.001 to 200 ppm of methyl 4-(1,3-dioxolan-2-yl)benzoate and 0 to 1 ppm of dimethyl hydroxyterephthalate contained in dimethyl terephthalate, and exhibits improved properties as a material for producing polyester.
    Type: Application
    Filed: May 27, 2003
    Publication date: March 18, 2004
    Inventors: Kenichi Ishihara, Kazumasa Mizuno, Minoru Nakashima, Kazuhiro Sato, Masanori Miyamoto, Taizo Mori