Patents by Inventor Masayuki Kinnou

Masayuki Kinnou 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).

  • Production process of colored fine particulate composition and colored fine particulate composition produced by the process
    Patent number: 6258503
    Abstract: A process is provided for producing a colored fine particulate composition by dissolving or dispersing a coloring matter or a coloring matter and charge control agent in a condensation-polymerized resin component and forming the resultant resin composition into fine particles. The coloring matter or the coloring matter and charge control agent are added to a raw material component for the production of the resin component, or to the resin component in a period from initiation to completion of polymerization of the resin component or while the resin component is in a molten state subsequent to the completion of the polymerization, whereby the coloring matter or the coloring matter and charge control agent are dissolved or dispersed in the resulting resin component. A colored composition obtained subsequent to the dissolution or the dispersion is cooled. The colored composition so cooled is then formed into fine particles.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: July 10, 2001
    Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Michiei Nakamura, Hiroyuki Shimanaka, Kazuo Kanou, Masayuki Takahashi, Yukio Kanbara, Masayuki Kinnou, Chikamasa Nakamura, Keiji Nakajima