Patents by Inventor Hideto Yamazaki

Hideto Yamazaki 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).

  • Ink composition process for its preparation and ink-jet recording process
    Patent number: 5656072
    Abstract: An ink composition comprising a dye or pigment, dissolved or dispersed in an aqueous medium, and having acetates in a content less than 90 ppm or formates in a content less than 6 ppm.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: August 12, 1997
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Masahito Kato, Hideto Yamazaki
  • Ink composition, process for its preparation, and ink-jet recording process
    Patent number: 5645630
    Abstract: An ink composition comprising a dye or pigment, dissolved or dispersed in an aqueous medium, and having chromium in a content less than 0.5 ppm.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: July 8, 1997
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Hideto Yamazaki
  • Ink composition, process for its preparation, and ink-jet recording process
    Patent number: 5637138
    Abstract: An ink composition comprising a dye or pigment, dissolved or dispersed in an aqueous medium, and containing sodium in a concentration less than 6 ppm or potassium in a concentration less than 5 ppm.
    Type: Grant
    Filed: May 21, 1996
    Date of Patent: June 10, 1997
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Hideto Yamazaki
  • Recording ink containing pigment particles
    Patent number: 5538548
    Abstract: A recording ink containing a pigment as a coloring agent, which is dispersed in an ink solvent, the pigment having a primary particle size of not larger than 30 nm, a DBP absorption of at least 75 ml/100 g, a specific surface area in a range of 100-300 m.sup.2 /g, and a tinting strength of at least 100.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: July 23, 1996
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Hideto Yamazaki