Patents by Inventor Masami Kuwabara

Masami Kuwabara 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).

  • Method for dispersing pigment and water-based pigment dispersion
    Patent number: 5635552
    Abstract: A method is disclosed for dispersing a pigment to obtain a pigment dispersion. The method involves dispersing 100 parts by weight of a pigment, 0.1 to 30 parts by weight of a specific pigment dispersing agent and 5 to 300 parts by weight of a water-based resin in 100 to 2,000 parts by weight of an aqueous medium having a water-soluble organic solvent concentration of 4 to 15% by weight. Pigments are obtained which are suitable for the production of water-based coating compositions or water-based inks excellent in fluidity, storage stability, gloss of a coating, sharpness and tinting strength.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: June 3, 1997
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Atsushi Endo, Akimitsu Mochizuki, Tadashi Itabashi, Masami Kuwabara
  • Microminiature connector
    Patent number: 4530557
    Abstract: In a connector in which holding portions of contacts are molded in an insulating substrate to hold the contact, a metal plate is molded in the insulating substrate integrally therewith so that it is opposite to and insulated from the contact holding portions.
    Type: Grant
    Filed: November 22, 1983
    Date of Patent: July 23, 1985
    Assignees: Sony Corporation, Hosiden Electronics Co., Ltd.
    Inventors: Kazuaki Katsube, Masami Kuwabara