Patents by Inventor Yasuda Izumi

Yasuda Izumi 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).

  • MAGENTA INK COMPOSITION, INK CARTRIDGE, AND RECORDING SYSTEM AND RECORDED MATTER USING THE SAME
    Publication number: 20110310165
    Abstract: This invention provides a magenta ink composition that, when recorded, is excellent in color development, graininess, and gloss, is less likely to cause clogging in an ink jet recording head, and is excellent in color reproduction in a high-chroma and high-lightness red region. The magenta ink composition has an L* value of not less than 60 and a b* value of not more than ?17 when the a* value in CIE standard calculated from a visible absorption spectrum in a not more than 10000-fold diluted aqueous solution is 80.
    Type: Application
    Filed: July 27, 2011
    Publication date: December 22, 2011
    Inventors: Hironori SATO, Akira MIZUTANI, Shuichi Koganehira, Naoki Okamoto, Yasuda Izumi
  • Magenta ink composition, ink cartridge, and recording system and recorded matter using the same
    Patent number: 8016930
    Abstract: This invention provides a magenta ink composition that, when recorded, is excellent in color development, graininess, and gloss, is less likely to cause clogging in an ink jet recording head, and is excellent in color reproduction in a high-chroma and high-lightness red region. The magenta ink composition has an L* value of not less than 60 and a b* value of not more than ?17 when the a* value in CIE standard calculated from a visible absorption spectrum in a not more than 10000-fold diluted aqueous solution is 80.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: September 13, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Hironori Sato, Akira Mizutani, Shuichi Koganehira, Naoki Okamoto, Yasuda Izumi