Patents by Inventor Yumi SHIRATORI

Yumi SHIRATORI 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, ink jet recording method using same, and colored material
    Patent number: 10190009
    Abstract: An aqueous black ink composition that contains a colorant represented by formula (1) and one or more colorants (B-a) to (B-t). The ink composition is stable even when stored for a long period of time, has a low chroma and tint-free neutral black-to-gray color even when printing a deep color or light color, has a high printed image density, exhibits no change in hue when printed on different media, and produces a black recorded image having particularly excellent recorded image color development properties, light resistance, ozone gas resistance and moisture resistance.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: January 29, 2019
    Assignee: NIPPON KAYAKU KABUSHIKI KAISHA
    Inventors: Daisuke Ono, Yumi Shiratori, Yasuaki Ishiguro
  • INK COMPOSITION, INK JET RECORDING METHOD USING SAME, AND COLORED MATERIAL
    Publication number: 20160160065
    Abstract: An aqueous black ink composition that contains a colorant represented by formula (1) and one or more colorants (B-a) to (B-t). The ink composition is stable even when stored for a long period of time, has a low chroma and tint-free neutral black-to-gray color even when printing a deep color or light color, has a high printed image density, exhibits no change in hue when printed on different media, and produces a black recorded image having particularly excellent recorded image color development properties, light resistance, ozone gas resistance and moisture resistance.
    Type: Application
    Filed: August 8, 2014
    Publication date: June 9, 2016
    Inventors: Daisuke ONO, Yumi SHIRATORI, Yasuaki ISHIGURO