Patents by Inventor Mutsuhiko Shimada

Mutsuhiko Shimada 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).

  • Foamed styrene resin material and heat insulating material using the same for construction
    Patent number: 6034143
    Abstract: A foamed styrene resin material has a density .rho. of 0.02 to 0.008 and a melt tension of the styrene resin of 5 to 40 gf. The relation between an average cell diameter d (.mu.m) and the density .rho. is given by the expression: ##EQU1## and a relation between a thermal conductivity .lambda. (kcal/m.multidot.h.multidot..degree. C.) and the density .rho. given by the expression: ##EQU2## Accordingly, the foamed styrene resin material has a low thermal conductivity and excellent insulating property in spite of a low density (high expansion ratio foam) thereof.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: March 7, 2000
    Assignee: Sekisui Plastics Co., Ltd.
    Inventors: Ikuo Morioka, Yukio Aramomi, Mutsuhiko Shimada
  • Method of molding expandable styrene type resin particles
    Patent number: 5683637
    Abstract: A foamed article of styrene type resin, in which base resin particles are styrene type resin particles obtainable by a graft polymerization of a cis-rich polybutadiene with a styrene type monomer, a blowing agent contains n-pentane as its main component and the foamed article shows a density of 0.015-0.040 g/cm.sup.3, an average foam diameter of 60-300 micrometers and a closed cell foam rate of not less than 50%.
    Type: Grant
    Filed: May 16, 1996
    Date of Patent: November 4, 1997
    Assignee: Sekisui Kaseihin Kogyo Kabushiki Kaisha
    Inventors: Ikuo Morioka, Hiroyuki Yamagata, Mutsuhiko Shimada
  • Expandable styrene type resin particles and foamed articles from said particles
    Patent number: 5580649
    Abstract: A foamed article of styrene type resin, in which base resin particles are styrene type resin particles obtainable by a graft polymerization of a cis-rich polybutadiene with a styrene type monomer, a blowing agent contains n-pentane as its main component and the foamed article shows a density of 0.015-0.040 g/cm.sup.3, an average foam diameter of 60-300 micrometers and a closed cell foam rate of not less than 50%.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: December 3, 1996
    Assignee: Sekisui Kaseihin Kogyo Kabushiki Kaisha
    Inventors: Ikuo Morioka, Hiroyuki Yamagata, Mutsuhiko Shimada