Patents by Inventor Keisuke Inui

Keisuke Inui 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).

  • Aqueous ink, ink cartridge and ink jet recording method
    Patent number: 11613129
    Abstract: The aqueous ink for ink jet contains a resin particle dyed with a fluorescent dye, and a water-soluble resin. The fluorescent dye contains a fluorescence-emitting dye selected from the group consisting of basic dye, disperse dye and oil-soluble dye, the resin particle has a core portion that contains an aromatic group-containing unit and cyano group-containing unit, and a shell portion that contains an aromatic group-containing unit, an anionic group-containing unit and a crosslinking agent-derived unit, but free of cyano group-containing unit, percentage (% by mass) of the crosslinking agent-derived unit in the shell portion is 30% by mass or more to 80% by mass or less, the water-soluble resin having an aromatic group-containing unit and an anionic group-containing unit, and the water-soluble resin having an acid value of 100 mgKOH/g or more to 180 mgKOH/g or less.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: March 28, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daiji Okamura, Naotoshi Miyamachi, Hiromitsu Kishi, Keisuke Inui, Hirohiko Yuasa, Naofumi Shimomura
  • Aqueous ink, ink cartridge and ink jet recording method
    Patent number: 11492483
    Abstract: Provided is an aqueous ink for ink jet, containing a resin particle, and a cyclic amide-based, water-soluble organic solvent. The resin particle has a core portion that contains a cyano group-containing unit, and a shell portion that contains an aromatic group-containing unit, an anionic group-containing unit and a unit derived from a crosslinking agent, but free of cyano group-containing unit. Ink jet recording using the aqueous ink can record images that excel in abrasion resistance and gloss clarity.
    Type: Grant
    Filed: June 29, 2020
    Date of Patent: November 8, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiromitsu Kishi, Daiji Okamura, Naotoshi Miyamachi, Keisuke Inui, Hirohiko Yuasa, Naofumi Shimomura
  • AQUEOUS INK, INK CARTRIDGE AND INK JET RECORDING METHOD
    Publication number: 20210002470
    Abstract: Provided is an aqueous ink for ink jet, containing a resin particle, and a cyclic amide-based, water-soluble organic solvent. The resin particle has a core portion that contains a cyano group-containing unit, and a shell portion that contains an aromatic group-containing unit, an anionic group-containing unit and a unit derived from a crosslinking agent, but free of cyano group-containing unit. Ink jet recording using the aqueous ink can record images that excel in abrasion resistance and gloss clarity.
    Type: Application
    Filed: June 29, 2020
    Publication date: January 7, 2021
    Inventors: Hiromitsu Kishi, Daiji Okamura, Naotoshi Miyamachi, Keisuke Inui, Hirohiko Yuasa, Naofumi Shimomura
  • AQUEOUS INK, INK CARTRIDGE AND INK JET RECORDING METHOD
    Publication number: 20210001636
    Abstract: The aqueous ink for ink jet contains a resin particle dyed with a fluorescent dye, and a water-soluble resin. The fluorescent dye contains a fluorescence-emitting dye selected from the group consisting of basic dye, disperse dye and oil-soluble dye, the resin particle has a core portion that contains an aromatic group-containing unit and cyano group-containing unit, and a shell portion that contains an aromatic group-containing unit, an anionic group-containing unit and a crosslinking agent-derived unit, but free of cyano group-containing unit, percentage (% by mass) of the crosslinking agent-derived unit in the shell portion is 30% by mass or more to 80% by mass or less, the water-soluble resin having an aromatic group-containing unit and an anionic group-containing unit, and the water-soluble resin having an acid value of 100 mgKOH/g or more to 180 mgKOH/g or less.
    Type: Application
    Filed: June 30, 2020
    Publication date: January 7, 2021
    Inventors: Daiji Okamura, Naotoshi Miyamachi, Hiromitsu Kishi, Keisuke Inui, Hirohiko Yuasa, Naofumi Shimomura