Patents by Inventor Kiyoshi Nakamura

Kiyoshi Nakamura 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: 11407909
    Abstract: A radiation-curable ink jet composition includes vinyl methyl oxazolidinone and a vinyl ether group-containing (meth)acrylate represented by the following formula (1): H2C?CR1—CO—OR2—O—CH?CH—R3 (where, R1 is a hydrogen atom or a methyl group, R2 is a divalent C2-C20 organic residue, and R3 is a hydrogen atom or a monovalent C1-C11 organic residue).
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: August 9, 2022
    Inventors: Toshiyuki Yoda, Toru Saito, Naoki Koike, Kiyoshi Nakamura, Kyohei Tanaka
  • Publication number: 20220203741
    Abstract: An ink jet recording method includes ejecting a radiation-curable ink jet composition to a recording medium from an ink jet head, and curing the ink jet composition ejected to the recording medium by irradiating with radiation from a LED irradiator having a peak wavelength of 250 to 310 nm to form a cured coating film. The ink jet composition contains a polymerizable compound and an ?-hydroxyketone-based initiator.
    Type: Application
    Filed: December 27, 2021
    Publication date: June 30, 2022
    Inventors: Toru SAITO, Kiyoshi NAKAMURA, Toshiyuki YODA, Midori SEKINE
  • Publication number: 20220195226
    Abstract: An ink set of radiation curable ink jet compositions, includes: an under layer ink; and an over layer ink, and the under layer ink contains, as a polymerizable compound, 80.0 percent by mass or more of a monofunctional polymerizable compound with respect to a total mass of polymerizable compounds and contains 55.0 percent by mass or more of a polymerizable compound having a nitrogen heterocyclic structure and/or a polymerizable compound having a hydroxy group in total with respect to the total mass of the polymerizable compounds.
    Type: Application
    Filed: December 22, 2021
    Publication date: June 23, 2022
    Inventors: Midori SEKINE, Kyohei TANAKA, Kiyoshi NAKAMURA
  • Patent number: 11142663
    Abstract: A UV-curable ink jet ink composition includes: 10.00% by mass or more and 60.00% by mass or less, relative to a total mass of the ink composition, of a compound represented by formula (A); 10.00% by mass or more and 50.00% by mass or less, relative to the total mass of the ink composition, of one or more monofunctional monomers having an alicyclic hydrocarbon group or a cyclic ether group; 0.05% by mass or more and 0.50% by mass or less, relative to the total mass of the ink composition, of one or more fluorescent brighteners including a compound represented by formula (b1), (b2), (b3), or (b4); and 3.00% by mass or more and 8.00% by mass or less, relative to the total mass of the ink composition, of one or more acylphosphine oxide polymerization initiators.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: October 12, 2021
    Inventors: Toru Saito, Naoki Koike, Toshiyuki Yoda, Kiyoshi Nakamura
  • Publication number: 20210301162
    Abstract: A radiation curable ink jet composition includes polymerizable compounds; and a photopolymerization initiator, the polymerizable compounds include a vinyl ether group-containing (meth)acrylate represented by the following general formula (I), a content of the vinyl ether group-containing (meth)acrylate with respect to a total mass of the radiation curable ink jet composition is 15 percent by mass or more, and the photopolymerization initiator includes ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate. H2C?CR1—CO—OR2—O—CH?CH—R3??(I) In the above formula, R1 represents a hydrogen atom or a methyl group, R2 represents a divalent organic residue having 2 to 20 carbon atoms, and R3 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms.
    Type: Application
    Filed: March 24, 2021
    Publication date: September 30, 2021
    Inventors: Kiyoshi NAKAMURA, Toru SAITO, Toshiyuki YODA, Naoki KOIKE
  • Publication number: 20210301158
    Abstract: A radiation curable ink jet composition includes polymerizable compounds and a photopolymerization initiator, the polymerizable compounds include a monofunctional monomer, a content of the monofunctional monomer with respect to a total mass of the polymerizable compounds is 90 percent by mass or more, and the photopolymerization initiator includes ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate.
    Type: Application
    Filed: March 24, 2021
    Publication date: September 30, 2021
    Inventors: Naoki KOIKE, Toru SAITO, Kyohei TANAKA, Kiyoshi NAKAMURA
  • Patent number: 11066563
    Abstract: A radiation curable ink comprises a compound represented by the following Formula (I): a compound represented by the following Formula (II): and a compound represented by the following Formula (III):
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: July 20, 2021
    Inventors: Kiyoshi Nakamura, Toru Saito, Naoki Koike, Toshiyuki Yoda
  • Patent number: 10968354
    Abstract: According to the invention, an electrophoretic dispersion liquid includes at least one type of an electrophoretic particle, and a dispersion medium, in which the content of transition metal of group 8 elements derived from a catalyst which is used to generate at least one of a block copolymer (a particle surface treatment agent) used to form the electrophoretic particle and the dispersion medium is in a range of greater than 0 ppm to equal to or less than 2 ppm in the electrophoretic dispersion liquid.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: April 6, 2021
    Assignee: E Ink Corporation
    Inventors: Harunobu Komatsu, Masahiko Nakazawa, Kiyoshi Nakamura, Hiroki Nakahara
  • Publication number: 20210079242
    Abstract: A radiation-curable ink jet composition includes vinyl methyl oxazolidinone and a vinyl ether group-containing (meth)acrylate represented by the following formula (1): H2C?CR1—CO—OR2—O—CH?CH—R3 (where, R1 is a hydrogen atom or a methyl group, R2 is a divalent C2-C20 organic residue, and R3 is a hydrogen atom or a monovalent C1-C11 organic residue).
    Type: Application
    Filed: September 11, 2020
    Publication date: March 18, 2021
    Inventors: Toshiyuki YODA, Toru SAITO, Naoki KOIKE, Kiyoshi NAKAMURA, Kyohei TANAKA
  • Publication number: 20200270472
    Abstract: A UV-curable ink jet ink composition includes: 10.00% by mass or more and 60.00% by mass or less, relative to a total mass of the ink composition, of a compound represented by formula (A); 10.00% by mass or more and 50.00% by mass or less, relative to the total mass of the ink composition, of one or more monofunctional monomers having an alicyclic hydrocarbon group or a cyclic ether group; 0.05% by mass or more and 0.50% by mass or less, relative to the total mass of the ink composition, of one or more fluorescent brighteners including a compound represented by formula (b1), (b2), (b3), or (b4); and 3.00% by mass or more and 8.00% by mass or less, relative to the total mass of the ink composition, of one or more acylphosphine oxide polymerization initiators.
    Type: Application
    Filed: February 26, 2020
    Publication date: August 27, 2020
    Inventors: Toru SAITO, Naoki KOIKE, Toshiyuki YODA, Kiyoshi NAKAMURA
  • Publication number: 20200102465
    Abstract: A radiation curable ink comprises a compound represented by the following Formula (I): (in Formula (I), R1 is a hydrogen atom or a methyl group, R2 is a divalent organic residue having 2 to 20 carbon atoms, and R3 is a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms), a compound represented by the following Formula (II): (in Formula (II), R1 is a hydrogen atom or a methyl group, R4 is a divalent organic residue having 2 to 5 carbon atoms, and n is an integer of 1 to 3), and a compound represented by the following Formula (III): (in Formula (III), R1 is a hydrogen atom or a methyl group, R5 is a divalent organic residue having 2 to 5 carbon atoms, R6 is an alkyl group having 1 to 10 carbon atoms or a hydroxyalkyl group having 1 to 10 carbon atoms, and m is an integer of 1 to 3).
    Type: Application
    Filed: September 26, 2019
    Publication date: April 2, 2020
    Inventors: Kiyoshi NAKAMURA, Toru SAITO, Naoki KOIKE, Toshiyuki YODA
  • Patent number: 10597541
    Abstract: An electrophoretic particle includes a base particle (particle), a first compound, a second compound, and a third compound bonded to the base particle. The first compound is a polymer having a dispersion portion derived from a first monomer, and a bonding portion derived from a second monomer, and is connected to the base particle at the bonding portion. The second compound includes a non-polar group and a second functional group and is connected to the base particle at the second functional group. The third compound includes a charging group and a second functional group and is connected to the base particle at the second functional group.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: March 24, 2020
    Assignee: E Ink Corporation
    Inventors: Keiichi Inoue, Kiyoshi Nakamura, Shinobu Yokokawa, Tomoyuki Ushiyama, Masahiko Nakazawa
  • Publication number: 20190062573
    Abstract: According to the invention, an electrophoretic dispersion liquid includes at least one type of an electrophoretic particle, and a dispersion medium, in which the content of transition metal of group 8 elements derived from a catalyst which is used to generate at least one of a block copolymer (a particle surface treatment agent) used to form the electrophoretic particle and the dispersion medium is in a range of greater than 0 ppm to equal to or less than 2 ppm in the electrophoretic dispersion liquid.
    Type: Application
    Filed: October 29, 2018
    Publication date: February 28, 2019
    Inventors: Harunobu KOMATSU, Masahiko NAKAZAWA, Kiyoshi NAKAMURA, Hiroki NAKAHARA
  • Publication number: 20190023913
    Abstract: An electrophoretic particle includes a base particle (particle), a first compound, a second compound, and a third compound bonded to the base particle. The first compound is a polymer having a dispersion portion derived from a first monomer, and a bonding portion derived from a second monomer, and is connected to the base particle at the bonding portion. The second compound includes a non-polar group and a second functional group and is connected to the base particle at the second functional group. The third compound includes a charging group and a second functional group and is connected to the base particle at the second functional group.
    Type: Application
    Filed: September 26, 2018
    Publication date: January 24, 2019
    Inventors: Keiichi Inoue, Kiyoshi Nakamura, Shinobu Yokokawa, Tomoyuki Ushiyama, Masahiko Nakazawa
  • Patent number: 10150877
    Abstract: According to the invention, an electrophoretic dispersion liquid includes at least one type of an electrophoretic particle, and a dispersion medium, in which the content of transition metal of group 8 elements derived from a catalyst which is used to generate at least one of a block copolymer (a particle surface treatment agent) used to form the electrophoretic particle and the dispersion medium is in a range of greater than 0 ppm to equal to or less than 2 ppm in the electrophoretic dispersion liquid.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: December 11, 2018
    Assignee: E Ink Corporation
    Inventors: Harunobu Komatsu, Masahiko Nakazawa, Kiyoshi Nakamura, Hiroki Nakahara
  • Patent number: 10113072
    Abstract: An electrophoretic particle includes a base particle (particle), a first compound, a second compound, and a third compound bonded to the base particle. The first compound is a polymer having a dispersion portion derived from a first monomer, and a bonding portion derived from a second monomer, and is connected to the base particle at the bonding portion. The second compound includes a non-polar group and a second functional group and is connected to the base particle at the second functional group. The third compound includes a charging group and a second functional group and is connected to the base particle at the second functional group.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: October 30, 2018
    Assignee: E Ink Corporation
    Inventors: Keiichi Inoue, Shinobu Yokokawa, Kiyoshi Nakamura, Tomoyuki Ushiyama, Masahiko Nakazawa
  • Patent number: 10001692
    Abstract: An electrophoretic particle includes a base particle (particle) that includes a first functional group, and a first compound and a second compound bonded to the base particle. The first compound is a polymer that includes a dispersion portion derived from a first monomer that contributes to dispersibility and a bonding portion derived from a second monomer including a second functional group having reactivity to the first functional group, and is connected to the base particle at the bonding portion. The second compound has a lower molecular weight than the first compound, includes a non-polar group and the second functional group, and is connected to the base particle at the second functional group.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: June 19, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Keiichi Inoue, Shinobu Yokokawa, Kiyoshi Nakamura, Tomoyuki Ushiyama
  • Patent number: 9958752
    Abstract: An electrophoresis display device includes an element substrate (first substrate); a counter substrate (second substrate) arranged facing the element substrate; an electrophoresis layer arranged between the element substrate and the counter substrate and which includes a dispersion liquid which contains electrophoretic particles and a dispersion medium in which the electrophoretic particles are dispersed; a dividing wall arranged to partition the electrophoresis layer into a plurality of cells; and a sealing layer arranged between the counter substrate and the dividing wall. The sealing layer has a modulus of elasticity at 25° C. of 1 MPa or more to 100 MPa or less.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: May 1, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Tadashi Yamada, Kiyoshi Nakamura, Saichi Hirabayashi, Nobukazu Nagae, Toru Katakabe
  • Patent number: 9921452
    Abstract: The electrophoretic display device includes an element substrate (first substrate), a counter substrate (second substrate) being disposed opposite to the element substrate, a partition being disposed between the element substrate and the counter substrate, and a dispersion liquid containing electrophoretic particles and the dispersion medium, which is disposed in a cell (space) defined by the partition. Further, a pixel electrodes (first electrode) is disposed on the dispersion liquid side of the element substrate, a common electrode (second electrode) is disposed on the dispersion liquid side of the counter substrate, the electrophoretic display device includes a coating layer on a surface in contact with the dispersion liquid in at least one electrode side of the pixel electrode and the common electrode, and the contact angle to water of the coating layer is not less than 60°.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: March 20, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Kiyoshi Nakamura, Kei Kamakura, Soichi Moriya, Toru Katakabe
  • Patent number: 9804472
    Abstract: An electrophoresis dispersion liquid includes first electrophoretic particle of a scattering system having an ionic group on a surface thereof; second electrophoretic particle of a coloring system having a polarization group on the surface thereof; and a dispersion medium. It is preferable that the ionic group is an acidic group, and further includes a ring structure that forms an acidic group and a salt. It is preferable that the polarization group is an organic group having a main skeleton, and a substituent bonded to the main skeleton.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: October 31, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Shinobu Yokokawa, Keiichi Inoue, Tomoyuki Ushiyama, Masahiko Nakazawa, Kiyoshi Nakamura