Patents by Inventor Seiji Hamanaka

Seiji Hamanaka 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).

  • Patent number: 11732148
    Abstract: Disclosed is an ink composition having excellent storage stability and capable of printing printed material having excellent metal tone. This active energy ray curable ink composition includes at least a scaly metal pigment, a polymerizable compound, and a photopolymerization initiator. The scaly metal pigment has a 50% volume average diameter of at least 0.05 ?m and less than 0.5 ?m, an average thickness of at least 5.0 nm and less than 50.0 nm, and a non-reactive solvent content of 0.01%-5.00% by mass.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: August 22, 2023
    Assignee: DAI NIPPON TORYO CO., LTD.
    Inventor: Seiji Hamanaka
  • Publication number: 20200385588
    Abstract: Disclosed is an ink composition having excellent storage stability and capable of printing printed material having excellent metal tone. This active energy ray curable ink composition includes at least a scaly metal pigment, a polymerizable compound, and a photopolymerization initiator. The scaly metal pigment has a 50% volume average diameter of at least 0.05 ?m and less than 0.5 ?m, an average thickness of at least 5.0 nm and less than 50.0 nm, and a non-reactive solvent content of 0.01%-5.00% by mass.
    Type: Application
    Filed: November 30, 2018
    Publication date: December 10, 2020
    Inventor: Seiji HAMANAKA
  • Patent number: 10023754
    Abstract: A metallic ink composition for inkjet printing for a polyvinyl chloride substrate, can form printed matter having superior mirror gloss and favorable scratch resistance, and is able to prevent nozzle clogging during inkjet printing, and more specifically pertains to a metallic ink composition that is for inkjet printing for a polyvinyl chloride substrate and that is characterized by containing at least a polyester resin (a) having a weight average molecular weight of no greater than 12,000, a metallic pigment dispersion (b) resulting from dispersing a evaporated aluminum pigment only in an organic solvent, and an organic solvent (c) that has solubility with respect to the polyvinyl chloride substrate.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: July 17, 2018
    Assignee: DAI NIPPON TORYO CO., LTD.
    Inventors: Keita Aoki, Seiji Hamanaka, Hiroki Hayashi, Akira Iwasawa
  • Publication number: 20160244627
    Abstract: A metallic ink composition for inkjet printing for a polyvinyl chloride substrate, can form printed matter having superior mirror gloss and favorable scratch resistance, and is able to prevent nozzle clogging during inkjet printing, and more specifically pertains to a metallic ink composition that is for inkjet printing for a polyvinyl chloride substrate and that is characterized by containing at least a polyester resin (a) having a weight average molecular weight of no greater than 12,000, a metallic pigment dispersion (b) resulting from dispersing a evaporated aluminum pigment only in an organic solvent, and an organic solvent (c) that has solubility with respect to the polyvinyl chloride substrate.
    Type: Application
    Filed: September 30, 2014
    Publication date: August 25, 2016
    Inventors: Keita AOKI, Seiji HAMANAKA, Hiroki HAYASHI, Akira IWASAWA
  • Patent number: 8940823
    Abstract: According to a water-based composition characterized by containing a colorant, water, a wetting agent, an amine compound, a hydroxyl group-containing organic solvent and a urethane resin having a polycarbonate group, there is provided a water-based coating composition being capable of easily controlling the gloss of a coating film applied on an object to be coated, having good storage stability, and being excellent in wetting properties to an object to be coated and continuous discharge stability without causing nozzle clogging.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: January 27, 2015
    Assignee: Dai Nippon Toryo Co., Ltd.
    Inventors: Akira Iwasawa, Takeshi Fujimoto, Yasuhiro Kawai, Seiji Hamanaka
  • Publication number: 20140011928
    Abstract: According to a water-based composition characterized by containing a colorant, water, a wetting agent, an amine compound, a hydroxyl group-containing organic solvent and a urethane resin having a polycarbonate group, there is provided a water-based coating composition being capable of easily controlling the gloss of a coating film applied on an object to be coated, having good storage stability, and being excellent in wetting properties to an object to be coated and continuous discharge stability without causing nozzle clogging.
    Type: Application
    Filed: March 30, 2012
    Publication date: January 9, 2014
    Applicant: DAI NIPPON TORYO CO., LTD.
    Inventors: Akira Iwasawa, Takeshi Fujimoto, Yasuhiro Kawai, Seiji Hamanaka