Patents by Inventor Ryozo Sugawara

Ryozo Sugawara 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).

  • Toner for non-magnetic single component development
    Patent number: 6248493
    Abstract: Use of a polyester resin obtained by reacting a divalent or higher epoxy compound, a dibasic or higher polybasic acid compound selected from a polybasic acid and/or acid anhydride and/or lower alkyl ester thereof, and a divalent or higher polyvalent alcohol in a toner for electrostatic charge development containing at least a binder resin, a colorant, and a charge control agent can provide a toner for a non-magnetic single component development having excellent fixing properties, offset resistance and development durability.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: June 19, 2001
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Katsuyuki Ogura, Masanobu Nakamura, Hiroyuki Mariko, Yoshinori Shimane, Ryozo Sugawara, Hiroyuki Terada, kinji Shinzo
  • Toner composition and developer for electrostatic image development
    Patent number: 6238836
    Abstract: An electrostatic image developer is provided which has superior fixation properties and anti-offset properties, exhibits stable charge behavior even during continuous printing, and has superior durability and permits a high-quality image to be obtained.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: May 29, 2001
    Assignee: Dainippon Ink Chemicals, Inc.
    Inventors: Masanobu Nakamura, Toshiro Kogawara, Hideki Gambayashi, Norio Aoki, Yoshinori Shimane, Ryozo Sugawara, Kinji Shinzo
  • Sheet-like articles of polyvinyl chloride
    Patent number: 4402887
    Abstract: A sheet-like article of polyvinyl chloride which is obtained by calendering a composition comprising polyvinyl chloride, a reactive plasticizer, a photosensitizer, a stabilizer and a polymerization inhibitor, and then irradiating the product with ultraviolet rays.
    Type: Grant
    Filed: July 30, 1979
    Date of Patent: September 6, 1983
    Assignee: Dainippon Ink and Chemicals Inc.
    Inventors: Kazuya Kuriyama, Shigeru Murakami, Ryozo Sugawara, Kiyoshi Honda
  • Embossed interior finishing materials having excellent cigarette mark resistance
    Patent number: 4278728
    Abstract: An embossed interior finishing material having superior cigarette mark resistance, said material comprising(A) a base material(B) formed on said base material, a foamed and ultraviolet-cured undercoat layer obtained from a vinyl chloride polymer, a reactive plasticizer, a blowing agent and a light sensitizer, and(C) formed on said undercoat layer, an ultraviolet-cured top coat layer obtained from a vinyl chloride polymer, a reactive plasticizer and a light sensitizer, or(C') formed on said undercoat layer, an ultraviolet-cured top paint layer.
    Type: Grant
    Filed: October 26, 1979
    Date of Patent: July 14, 1981
    Assignee: Dainippon Ink & Chemicals, Inc.
    Inventors: Kiyoshi Honda, Kazuya Kuriyama, Shigeru Murakami, Ryozo Sugawara, Chiaki Nakamura