Patents by Inventor Fusao Imai

Fusao Imai 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).

  • Polyurethane elastic yarns and their production
    Patent number: 4525420
    Abstract: A polyurethane elastic yarn, characterized in that an inorganic filler having a refractive index (n.sub.D.sup.20.degree. C.) of not more than 1.75 is contained therein in an amount of not less than 0.2% by weight. The elastic yarn is improved in spinning property and also in light resistance and chlorine resistance.
    Type: Grant
    Filed: September 22, 1983
    Date of Patent: June 25, 1985
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Fusao Imai, Norio Okumura
  • Method of producing extruded plate-like polystyrene foam
    Patent number: 4451417
    Abstract: In a method of producing a plate-like polystyrene resin foam which comprises extruding a molten mixture of a polystyrene resin and a volatile blowing agent from an extruder into a zone kept at a lower pressure than the inside of the extruder, the improvement wherein the volatile blowing agent is a mixture consisting of 50 to 80% by weight of dichlorodifluoromethane and 50 to 20% by weight of ethyl chloride and is present in said molten mixture in a proportion of 8 to 17 parts by weight per 100 parts by weight of the polystyrene resin.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: May 29, 1984
    Assignee: Japan Styrene Paper Corporation
    Inventors: Hiroyuki Akiyama, Hidewo Hatakeyama, Nobuyoshi Shimoyashiki, Yoshiaki Momose, Fusao Imai
  • Process for producing plate-like polystyrene resin foam
    Patent number: 4393016
    Abstract: In a process for producing a plate-like polystyrene resin foam which comprises extruding a molten mixture consisting of a polystyrene resin and a volatile blowing agent by an extruder into a zone having a lower pressure than the inside of the extruder; the improvement wherein said volatile blowing agent is a mixture consisting of dichlorodifluoromethane, ethyl chloride and methyl chloride in which dichlorodifluoromethane accounts for 50 to 70% by weight of the mixture and the remainder consists of ethyl chloride and methyl chloride and the amount of ethyl chloride is at least 30% by weight based on the total amount of ethyl chloride and methyl chloride; and wherein said volatile blowing agent is present in said molten mixture in a proportion of 8 to 17 parts by weight per 100 parts by weight of the polystyrene resin component.
    Type: Grant
    Filed: August 28, 1981
    Date of Patent: July 12, 1983
    Assignee: Japan Styrene Paper Corporation
    Inventors: Hiroyuki Akiyama, Hideo Hatakeyama, Nobuyoshi Shimoyashiki, Yoshiaki Momose, Fusao Imai
  • Process for producing olefinic resin foams
    Patent number: 4255371
    Abstract: In a process for producing an olefinic resin foam which comprises the steps of forming a composition comprising an olefinic resin, a chemical blowing agent and a crosslinking agent into an unfoamed sheet-like or rod-like shaped article and foaming it by heating, the improvement wherein the heat-forming step is carried out in an oxygen-free atmosphere or in an atmosphere containing not more than 10% of oxygen.
    Type: Grant
    Filed: January 15, 1979
    Date of Patent: March 10, 1981
    Assignee: Japan Styrene Paper Corporation
    Inventors: Nobuyoshi Shimoyashiki, Teruo Masukawa, Fusao Imai