Patents by Inventor Chitae HASHIZUME

Chitae HASHIZUME 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 jet ink composition, ink pack, and ink jet printing method
    Patent number: 11639061
    Abstract: An ink jet ink composition contains a dye having an azo group, water, and a hindered amine compound having a radical. The dissolved nitrogen concentration of the ink composition is 10 ppm or less.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: May 2, 2023
    Inventors: Nao Kozaka, Yuki Wakushima, Yoshitaka Miyajima, Takeshi Yano, Chitae Hashizume
  • Ink Jet Ink Composition, Ink Pack, And Ink Jet Printing Method
    Publication number: 20200095443
    Abstract: An ink jet ink composition contains a dye having an azo group, water, and a hindered amine compound having a radical. The dissolved nitrogen concentration of the ink composition is 10 ppm or less.
    Type: Application
    Filed: September 24, 2019
    Publication date: March 26, 2020
    Inventors: Nao KOZAKA, Yuki WAKUSHIMA, Yoshitaka MIYAJIMA, Takeshi YANO, Chitae HASHIZUME