Patents by Inventor Yoshiya Maegawa

Yoshiya Maegawa 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).

  • Publication number: 20230365826
    Abstract: A nonaqueous ink composition contains organic solvents. The organic solvents include an organic solvent (a) and an organic solvent (b). Organic solvent (a): Glycol ether dialkyl. Organic solvent (b): At least one selected from the group consisting of alkylamide-based solvents (b1), cyclic amide-based solvents (b2), and lactone-based solvents (b3) each having a ring including six or more members.
    Type: Application
    Filed: September 30, 2021
    Publication date: November 16, 2023
    Applicant: DNP FINE CHEMICALS CO., LTD.
    Inventors: Keishiro YOSHIMORI, Yuka ORIKASA, Kisei MATSUMOTO, Koujun UTAKA, Mitsuyoshi TAMURA, Mitsuteru YAMADA, Ryouhei OKA, Yoshiya MAEGAWA
  • Publication number: 20230111531
    Abstract: A non-aqueous ink composition which has superior printing performance, such as continuous discharge stability, and also has excellent storage stability and excellent coloring properties, and with which printed matter having superior durability can be obtained. A non-aqueous ink composition discharged using an inkjet method, the composition containing an organic solvent, a colorant, and a resin, where the resin contains at least one resin selected from the group consisting of acrylic resins, vinyl chloride-vinyl acetate copolymer resins, and cellulose resins, and a resin having intrinsic viscosity at 25° C. of 90 mL/g or more accounts for up to 5 mass% of the entire resin.
    Type: Application
    Filed: March 31, 2021
    Publication date: April 13, 2023
    Applicant: DNP FINE CHEMICALS CO., LTD.
    Inventors: Ryouhei OKA, Yoshiya MAEGAWA, Keita YOSHIYUKI, Karuna IWASAWA, Yuka ORIKASA, Keishiro YOSHIMORI
  • Patent number: 11104821
    Abstract: The purpose of the present invention is to provide a receptive solution which can suppress the occurrence of odor from the receptive solution itself when the receptive solution is applied on a recording medium, and can also prevent the appearance of a printed surface from being deteriorated. The receptive solution for ink-jet recording ink contains polyvalent metal cations, an aqueous solvent, a resin, and anions, wherein the resin is contained as a resin emulsion, and the anions contained in the receptive solution contain anions of an organic substance which has an OV/IV value of 0.3-1.0, the OV/IV value being a ratio of an organic value to an inorganic value.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: August 31, 2021
    Assignee: DNP Fine Chemicals Co., Ltd.
    Inventors: Kentaro Otomo, Fumie Yamazaki, Naoki Shiraishi, Kisei Matsumoto, Yoshiya Maegawa
  • Patent number: 10875340
    Abstract: This receiving solution for inkjet recording inks contains a resin emulsion as the resin; the polyvalent metal salt contains ions of a polyvalent metal and anions of an organic material; the (organic value)/(inorganic value) ratio, namely the OV/IV value of the anions of the organic material is 0.25 or more but less than 1.30; the HLB value of the surfactant is from 9 to 19 (inclusive); and the surfactant is represented by general formula (1). (In the formula, R1 represents an optionally branched alkylene group having 1 to 5 carbon atoms (inclusive); R2 represents a hydrogen atom or an optionally branched alkyl group having 1 to 3 carbon atoms (inclusive); R3 represents a hydrogen atom or an optionally branched alkyl group having 1 to 3 carbon atoms (inclusive); A represents 2 or 3; X represents ethylene oxide and/or propylene oxide; and n represents an integer).
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: December 29, 2020
    Assignee: DNP Fine Chemicals Co., Ltd.
    Inventors: Yoshiya Maegawa, Fumie Yamazaki, Naoki Shiraishi, Kisei Matsumoto, Kentaro Otomo
  • Publication number: 20200070554
    Abstract: This receiving solution for inkjet recording inks contains a resin emulsion as the resin; the polyvalent metal salt contains ions of a polyvalent metal and anions of an organic material; the (organic value)/(inorganic value) ratio, namely the OV/IV value of the anions of the organic material is 0.25 or more but less than 1.30; the HLB value of the surfactant is from 9 to 19 (inclusive); and the surfactant is represented by general formula (1). (In the formula, R1 represents an optionally branched alkylene group having 1 to 5 carbon atoms (inclusive); R2 represents a hydrogen atom or an optionally branched alkyl group having 1 to 3 carbon atoms (inclusive); R3 represents a hydrogen atom or an optionally branched alkyl group having 1 to 3 carbon atoms (inclusive); A represents 2 or 3; X represents ethylene oxide and/or propylene oxide; and n represents an integer.
    Type: Application
    Filed: March 28, 2018
    Publication date: March 5, 2020
    Inventors: Yoshiya Maegawa, Fumie Yamazaki, Naoki Shiraishi, Kisei Matsumoto, Kentaro Otomo
  • Publication number: 20200040207
    Abstract: The purpose of the present invention is to provide a receptive solution which can suppress the occurrence of odor from the receptive solution itself when the receptive solution is applied on a recording medium, and can also prevent the appearance of a printed surface from being deteriorated. The receptive solution for ink-jet recording ink contains polyvalent metal cations, an aqueous solvent, a resin, and anions, wherein the resin is contained as a resin emulsion, and the anions contained in the receptive solution contain anions of an organic substance which has an OV/IV value of 0.3-1.0, the OV/IV value being a ratio of an organic value to an inorganic value.
    Type: Application
    Filed: March 28, 2018
    Publication date: February 6, 2020
    Inventors: Kentaro Otomo, Fumie Yamazaki, Naoki Shiraishi, Kisei Matsumoto, Yoshiya Maegawa