Patents by Inventor Toshiyuki Kusuda

Toshiyuki Kusuda 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).

  • A toner composition comprising a rosin-containing polyester
    Patent number: 4968575
    Abstract: There are provided binder resins for use in toner compositions which comprise, as the main component thereof, a terminally blocked polyester in which the terminal hydroxyl groups of polyester polyol molecules are blocked by a rosin compound selected from the group consisting of rosin, hydrogenated rosin and disproportionated rosin and which has an acid value of not more than 4 KOH mg/g and a hydroxyl value of not more than 20 KOH mg/g as well as toner compositions comprising them in combination of a coloring agent and a charge control agent.
    Type: Grant
    Filed: July 19, 1988
    Date of Patent: November 6, 1990
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Akira Matsumura, Tomiji Itou, Toshiyuki Kusuda, Sadao Shigematsu