Patents by Inventor Yoshikiyo Miura

Yoshikiyo Miura 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).

  • Continuous mass polymerization process for making styrene copolymers
    Patent number: 5194525
    Abstract: A process for producing a styrenic copolymer for injection molding or extrusion molding by continuous mass polymerization of a styrenic monomer with a polymerizable unsaturated fatty acid, charcterized by using a polymerization apparatus comprising a circulation polymerization line (I) in which a tubular reactor with plural mixing elements fixed therein is incorporated, said mixing elements having no mobile parts, and a second non-circulation polymerization line (II) provided in succession to said circulation polymerization line (I), in which a tubular reactor with plural mixing elements fixed therein is incorporated, said mixing elements having no mobile parts; and supplementing the polymerizable unsaturated fatty acid to at least two spots of the second non-circulation polymerization line (II).
    Type: Grant
    Filed: August 6, 1991
    Date of Patent: March 16, 1993
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Yoshikiyo Miura, Kyotaro Shimazu
  • Process for producing styrene/(meth)acrylic acid copolymer
    Patent number: 4937298
    Abstract: A process for producing a styrene/(meth)acrylic acid copolymer continuously by a bulk or solution polymerization technique, wherein the polymerization is carried out continuously by using at least two polymerization vessels arranged in series and equipped with a mixing device while (meth)acrylic acid is continuously fed into each of the polymerization vessels.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: June 26, 1990
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Yoshikiyo Miura, Kyotaro Shimazu
  • Heat-resistant high impact styrene resin, process for production thereof, and resin composition comprising said styrene resin
    Patent number: 4631307
    Abstract: This invention provides a styrene copolymer resin having heat resistance and impact resistance. The resin is a moldable thermoplastic resin obtained by copolymerizing 3 to 70% by weight of a rubbery polymer and 97 to 30% by weight in total of styrene and methacrylic acid, provided that the proportions of styrene and methacrylic acid are 97 to 65% by weight and 3 to 35% by weight, respectively. The styrene and methacrylic acid are partly grafted to the rubbery polymer.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: December 23, 1986
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Atsushi Hosoda, Yoshikiyo Miura, Takehisa Mizuno, Tsuyoshi Morita