Patents by Inventor Kenichiro Kubota

Kenichiro Kubota 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: 20230312965
    Abstract: A non-aqueous ink jet ink composition according to an embodiment of the present disclosure is an ink composition including a bright pigment, and glycol monoether A and glycol monoether B that are represented by Formula (1) and have flash points different from each other, in which the glycol ether A has a flash point of 85° C. or lower, the glycol monoether B has a flash point of 95° C. or higher, a total content of the glycol monoether A and the glycol monoether B is in a range of 20% to 60% by mass with respect to a total amount of the ink composition, and the content of the glycol monoether A is greater than the content of the glycol monoether B. R1—(O—R2)n—OH??Formula (1) (In Formula (1), R1 represents an alkyl group having 1 to 8 carbon atoms or a phenyl group, R2 represents an alkylene group having 1 to 5 carbon atoms, and n represents an integer of 1 to 4.
    Type: Application
    Filed: March 30, 2023
    Publication date: October 5, 2023
    Inventors: Hiroshi TAKIGUCHI, Kenichiro KUBOTA, Akira MATSUMOTO
  • Patent number: 11718100
    Abstract: A non-aqueous ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes a cyclic ester compound, at least one first solvent represented by the following General Formula (1) and having a flash point of 140° C. or lower: R1O—(R2O)m—R3, a second solvent represented by the General Formula (1), and C.I. Pigment Orange-43 (PO-43) as a pigment. In the at least one first solvent represented by General Formula (1), R1 and R3 each independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms, R2 represents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 to 6. The second solvent represented by General Formula (1) includes a glycol monoether compound in which at least one of R1 and R3 is hydrogen. A volume average particle diameter of the PO-43 is 100 nm or more and 400 nm or less.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: August 8, 2023
    Inventors: Keiji Iida, Kenichiro Kubota, Naoki Koike, Jun Ito, Makoto Nagase
  • Patent number: 11465420
    Abstract: An ink jet ink set includes a plurality of inks to be ejected by an ink jet method. The ink set includes a first ink containing metal particles, and a second ink containing a coloring agent selected from materials other than metal. The surface tension of the first ink is lower than that of the second ink.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: October 11, 2022
    Inventors: Hiroaki Kida, Hiroshi Takiguchi, Kenichiro Kubota, Akira Matsumoto
  • Publication number: 20210122166
    Abstract: A non-aqueous ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes a cyclic ester compound, at least one first solvent represented by the following General Formula (1) and having a flash point of 140° C. or lower: R1O—(R2O)m—R3, a second solvent represented by the General Formula (1), and C.I. Pigment Orange-43 (PO-43) as a pigment. In the at least one first solvent represented by General Formula (1), R1 and R3 each independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms, R2 represents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 to 6. The second solvent represented by General Formula (1) includes a glycol monoether compound in which at least one of R1 and R3 is hydrogen. A volume average particle diameter of the PO-43 is 100 nm or more and 400 nm or less.
    Type: Application
    Filed: January 6, 2021
    Publication date: April 29, 2021
    Inventors: Keiji IIDA, Kenichiro KUBOTA, Naoki KOIKE, Jun ITO, Makoto NAGASE
  • Publication number: 20210094313
    Abstract: An ink jet ink set includes a plurality of inks to be ejected by an ink jet method. The ink set includes a first ink containing metal particles, and a second ink containing a coloring agent selected from materials other than metal. The surface tension of the first ink is lower than that of the second ink.
    Type: Application
    Filed: September 29, 2020
    Publication date: April 1, 2021
    Inventors: Hiroaki KIDA, Hiroshi TAKIGUCHI, Kenichiro KUBOTA, Akira MATSUMOTO
  • Patent number: 10919311
    Abstract: An ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes at least one solvent represented by R1O—(R2O)m—R3 and having a flash point of 140° C. or lower and C.I. Pigment Orange-43 (PO-43) as a pigment, wherein R1 and R3 each independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms, R2 represents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 to 6.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: February 16, 2021
    Inventors: Keiji Iida, Kenichiro Kubota, Naoki Koike, Jun Ito, Makoto Nagase
  • Patent number: 10821741
    Abstract: An ink composition includes a solvent containing at least one compound represented by the following general formula (1): R1O—(R2O)m—R3??(1) wherein R1 and R3 each independently represent a hydrogen or an alkyl group having from 1 to 4 carbon atoms, R2 represents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 or 3; and a pigment containing Pigment Orange-43 (PO-43) having a volume average particle size of 100 nm or more and 400 nm or less.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: November 3, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Naoki Koike, Keiji Iida, Jun Ito, Kenichiro Kubota, Makoto Nagase
  • Patent number: 10800162
    Abstract: A non-aqueous ink jet composition includes a pigment component containing a diketopyrrolopyrrole pigment and an organic solvent. The organic solvent contains a glycol ether. The amount of water in the non-aqueous ink jet composition is 10 mass % or less based on the total amount of the non-aqueous ink jet composition.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: October 13, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Shugo Hattori, Naoki Koike, Jun Ito, Kenichiro Kubota
  • Patent number: 10781327
    Abstract: An ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes a solvent containing at least one cyclic ester compound; and C.I. Pigment Orange-43 (PO-43) as a pigment.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: September 22, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Kenichiro Kubota, Naoki Koike, Keiji Iida, Jun Ito, Shugo Hattori
  • Patent number: 10450473
    Abstract: A non-aqueous ink jet composition includes a pigment at least containing a diketopyrrolopyrrole red pigment, and an organic solvent at least containing a glycol diether represented by Formula (1): R1O—(R3O)m—R2 and a glycol monoether represented by Formula (2): OH—(R5O)n—R4, wherein, in Formula (1), R1 and R2 each independently represent an alkyl group having 1 to 7 carbon atoms, R3 represents an alkylene group having 1 to 3 carbon atoms, and m represents an integer of 1 to 7; and in Formula (2), R4 represents an alkyl group having 1 to 7 carbon atoms, R5 represents an alkylene group having 1 to 3 carbon atoms, and n represents an integer of 1 to 7.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: October 22, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Kenichiro Kubota, Naoki Koike, Jun Ito, Shugo Hattori
  • Patent number: 10400124
    Abstract: An ink composition set has at least a solvent-based orange ink composition containing an orange pigment as a pigment and a solvent and a solvent-based red ink composition containing a red pigment as a pigment and a solvent.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: September 3, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Kenichiro Kubota, Makoto Nagase, Jun Ito, Naoki Koike, Keiji Iida
  • Patent number: 10351722
    Abstract: A non-aqueous ink jet composition includes a pigment component containing a diketopyrrolopyrrole pigment and an organic solvent. The organic solvent contains glycol ethers. The amount of dissolved nitrogen in the non-aqueous ink jet composition is 90 mass ppm or less based on the total amount of the non-aqueous ink jet composition.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: July 16, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Kenichiro Kubota, Naoki Koike, Jun Ito, Shugo Hattori
  • Patent number: 10253198
    Abstract: A solvent-based ink jet ink composition accommodating body includes a solvent-based ink jet ink composition which includes a solvent that is a compound represented by a general formula (1) below, and for which a moisture absorption rate is 2 (mass %·24 hours) or more at 40° C. and a relative humidity of 100% RH; and a container in which the solvent-based ink jet ink composition is accommodated, in which the container is either of at least a container formed of a member having an inorganic oxide layer or a package which accommodates the container in which the solvent-based ink jet ink composition is accommodated and is formed of a member having an inorganic oxide layer: R1O—(R2O)m—R3??(1) wherein in the general formula (1), R1 and R3 each independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms; R2 represents an alkylene group having 2 to 4 carbon atoms; and m represents an integer of 1 to 6.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: April 9, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Jun Ito, Kenichiro Kubota, Naoki Koike, Shugo Hattori
  • Publication number: 20190077979
    Abstract: A non-aqueous ink jet composition includes a pigment component containing a diketopyrrolopyrrole pigment and an organic solvent. The organic solvent contains glycol ethers. The amount of dissolved nitrogen in the non-aqueous ink jet composition is 90 mass ppm or less based on the total amount of the non-aqueous ink jet composition.
    Type: Application
    Filed: November 9, 2018
    Publication date: March 14, 2019
    Inventors: Kenichiro KUBOTA, Naoki KOIKE, Jun ITO, Shugo HATTORI
  • Patent number: 10208219
    Abstract: A non-aqueous ink jet composition includes a pigment component containing a diketopyrrolopyrrole pigment and an organic solvent. The organic solvent contains glycol ethers. The amount of dissolved nitrogen in the non-aqueous ink jet composition is 90 mass ppm or less based on the total amount of the non-aqueous ink jet composition.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: February 19, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Kenichiro Kubota, Naoki Koike, Jun Ito, Shugo Hattori
  • Patent number: 9963606
    Abstract: A non-aqueous ink jet ink composition contains a white pigment having an average particle diameter of 200 nm or more and 400 nm or less, glycol diether represented by the following formula 1 and having a flash point of 70° C. or less, and glycol monoether represented by the following formula 2: R1O—(R2O)m—R3??Formula 1: (In Formula 1, R1 and R3 each independently represent alkyl groups having 1 to 4 carbon atoms, R2 each independently represents alkylene groups having 2 to 3 carbon atoms, and m is an integer of 1 to 4.); and HO—(R4O)n—R5??Formula 2: (In Formula 2, R4 each independently represents alkylene groups having 2 to 3 carbon atoms, R5 is an alkyl group having 1 to 4 carbon atoms, and n is an integer of 1 to 4.).
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: May 8, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Naoki Koike, Jun Ito, Kenichiro Kubota, Makoto Nagase
  • Patent number: 9919520
    Abstract: An ink jet recording method according to the invention includes: ejecting droplets of non-water-based ink, which contains an organic solvent, a color material, and resin, from nozzles of a recording head and causing the droplets to adhere to a recording medium to form an image; and preliminarily ejecting the droplets of the non-water-based-ink from the nozzles of the recording head not for forming the image. In the preliminary ejecting of the droplets, a time interval at which the preliminary ejecting is performed by a predetermined nozzle is equal to or greater than two seconds and equal to or less than twenty five seconds. The organic solvent contains a first solvent which is at least one kind selected from a hydrocarbon-based solvent, an alcohol-based solvent, and an ester-based solvent. Content of the first solvent is equal to or greater than 40% by mass with respect to entire content of the non-water-based ink.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: March 20, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Makoto Nagase, Akihito Sao, Kenichiro Kubota, Jun Ito, Naoki Koike
  • Publication number: 20180057701
    Abstract: An ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes a solvent containing at least one cyclic ester compound; and C.I. Pigment Orange-43 (PO-43) as a pigment.
    Type: Application
    Filed: January 22, 2016
    Publication date: March 1, 2018
    Applicant: Seiko Epson Corporation
    Inventors: Kenichiro KUBOTA, Naoki KOIKE, Keiji IIDA, Jun ITO, Shugo HATTORI
  • Patent number: 9889660
    Abstract: An ink jet recording method including causing ink to adhere to a recording medium by ejecting an ink composition using a print head provided with a nozzle, a pressure chamber, and a connection portion which connects the pressure chamber and the nozzle to each other at a length of 500 ?m or more, in which the ink composition includes a coloring material and a solvent represented by General Formula (1) below at 30 mass % or more with respect to a total mass of the ink composition, R1O—(R2O)n—R3??(1) (in General Formula (1), R1 and R3 each independently represent a hydrogen or an alkyl group with 1 to 5 carbon atoms and at least one of R1 and R3 is an alkyl group with 1 to 5 carbon atoms, R2 represents an alkylene group with 2 to 4 carbon atoms, and n represents an integer of 1 to 6).
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: February 13, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Jun Ito, Kenichiro Kubota, Naoki Koike, Keiji Iida
  • Publication number: 20180037761
    Abstract: An ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes at least one solvent represented by R1O—(R2O)m—R3 and having a flash point of 140° C. or lower and C.I. Pigment Orange-43 (PO-43) as a pigment, wherein R1 and R3 each independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms, R2 represents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 to 6.
    Type: Application
    Filed: January 25, 2016
    Publication date: February 8, 2018
    Inventors: Keiji IIDA, Kenichiro KUBOTA, Naoki KOIKE, Jun ITO, Makoto NAGASE