Patents by Inventor Tomohiro MATSUZAWA

Tomohiro MATSUZAWA 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).

  • Oil-based inkjet ink and method for producing oil-based inkjet ink
    Patent number: 10920096
    Abstract: An oil-based inkjet ink is disclosed that contains a colorant, an oil-soluble resin that is an acrylic-based polymer having a side chain containing a polydimethylsiloxane structure, and a non-aqueous solvent. A method for producing an oil-based inkjet ink is also disclosed.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: February 16, 2021
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Shinsuke Ozawa, Mitsuko Kitanohara, Hikaru Sugiura, Yoshifumi Watanabe, Manami Shimizu, Naofumi Ezaki, Tomohiro Matsuzawa
  • Oil-based inkjet ink and method for producing oil-based inkjet ink
    Patent number: 10907062
    Abstract: An oil-based inkjet ink is disclosed that contains colored resin particles, an ionic dispersant and a non-aqueous solvent, wherein the colored resin particles contain a colorant and a urethane-urea resin. A method for producing an oil-based inkjet ink is also disclosed.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: February 2, 2021
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Tomohiro Matsuzawa, Yoshifumi Watanabe, Naofumi Ezaki, Yasuo Yamamoto, Mitsuko Kitanohara, Manami Shimizu
  • OIL-BASED INKJET INK AND METHOD FOR PRODUCING OIL-BASED INKJET INK
    Publication number: 20200002557
    Abstract: An oil-based inkjet ink is disclosed that contains colored resin particles, an ionic dispersant and a non-aqueous solvent, wherein the colored resin particles contain a colorant and a urethane-urea resin. A method for producing an oil-based inkjet ink is also disclosed.
    Type: Application
    Filed: May 31, 2019
    Publication date: January 2, 2020
    Inventors: Tomohiro MATSUZAWA, Yoshifumi WATANABE, Naofumi EZAKI, Yasuo YAMAMOTO, Mitsuko KITANOHARA, Manami SHIMIZU
  • OIL-BASED INKJET INK AND METHOD FOR PRODUCING OIL-BASED INKJET INK
    Publication number: 20190300737
    Abstract: An oil-based inkjet ink is disclosed that contains a colorant, an oil-soluble resin that is an acrylic-based polymer having a side chain containing a polydimethylsiloxane structure, and a non-aqueous solvent. A method for producing an oil-based inkjet ink is also disclosed.
    Type: Application
    Filed: February 19, 2019
    Publication date: October 3, 2019
    Inventors: Shinsuke OZAWA, Mitsuko KITANOHARA, Hikaru SUGIURA, Yoshifumi WATANABE, Manami SHIMIZU, Naofumi EZAKI, Tomohiro MATSUZAWA
  • Oil-based inkjet ink
    Patent number: 10106639
    Abstract: An oil-based inkjet ink that exhibits excellent repellency by the nozzle plate, prevents degradation of the nozzle plate, reduces image show-through, and yields high image density. The oil-based inkjet ink includes an encapsulated pigment containing a pigment and a urethane compound that coats the surface of the pigment, and a non-aqueous solvent, wherein the urethane compound has a urethane skeleton and one or more side chains and is insoluble in the non-aqueous solvent, and the side chains of the urethane compound contain one or more moieties selected from the group consisting of an aromatic ring, a heterocyclic ring, a carboxyl group, an amide linkage, a fluoroalkyl group having one or more fluorine atoms, and a nitrile group.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: October 23, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Yoshifumi Watanabe, Manami Shimizu, Kenji Yamada, Tomohiro Matsuzawa
  • OIL-BASED INKJET INK
    Publication number: 20180079854
    Abstract: An oil-based inkjet ink that exhibits excellent repellency by the nozzle plate, prevents degradation of the nozzle plate, reduces image show-through, and yields high image density. The oil-based inkjet ink includes an encapsulated pigment containing a pigment and a urethane compound that coats the surface of the pigment, and a non-aqueous solvent, wherein the urethane compound has a urethane skeleton and one or more side chains and is insoluble in the non-aqueous solvent, and the side chains of the urethane compound contain one or more moieties selected from the group consisting of an aromatic ring, a heterocyclic ring, a carboxyl group, an amide linkage, a fluoroalkyl group having one or more fluorine atoms, and a nitrile group.
    Type: Application
    Filed: June 26, 2017
    Publication date: March 22, 2018
    Inventors: Yoshifumi WATANABE, Manami SHIMIZU, Kenji YAMADA, Tomohiro MATSUZAWA