Patents by Inventor Kozo Shitagami

Kozo Shitagami 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: 20220033664
    Abstract: A molding composition contains a powder, a wax, an adhesive component, a molding component, and a plasticizer, in which a melt flow rate of the adhesive component at 190° C. is 200 g/10 min or more, and a density of the plasticizer is 1.0 g/cm3 or less.
    Type: Application
    Filed: July 30, 2021
    Publication date: February 3, 2022
    Inventors: Kozo SHITAGAMI, Eiji OKAMOTO, Akihiko TSUNOYA
  • Patent number: 10969647
    Abstract: An electrophoretic particle includes a particle and a coating layer, in which the coating layer includes at least one of dispersibility and chargeability, and includes a polymer that connects to the particle, where the polymer includes a first functional group and is connected to the particle via a connected body, the connected body has a molecular weight of 500 or less and includes a second functional group and a third functional group, and the particle, the connected body and the polymer are connected via the chemical bond formed by reacting the first and second functional groups and the chemical bond formed by reacting the hydroxyl group and the third functional group.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: April 6, 2021
    Assignee: E Ink Corporation
    Inventors: Kozo Shitagami, Kei Kamakura, Masahiko Nakazawa, Hiroki Nakahara, Harunobu Komatsu
  • Publication number: 20190256662
    Abstract: A method of manufacturing an electrophoretic particle is a method of manufacturing an electrophoretic particle including a particle and a particle surface treatment agent which is bonded to the particle, the method including preparing a mixture containing a plurality of the particles, the particle surface treatment agent, an unreacted product of a raw material used at the time of generating the particle surface treatment agent, and a reaction by-product generated at the time of generating the particle surface treatment agent, the mixture having a content of the particle surface treatment agent which is set to be equal to or greater than 70% by weight in the mixture except for the plurality of particles; and bonding the particle surface treatment agent to a surface of the particle in the mixture.
    Type: Application
    Filed: May 2, 2019
    Publication date: August 22, 2019
    Inventors: Harunobu KOMATSU, Hiroki NAKAHARA, Masahiko NAKAZAWA, Takashi HIRAIWA, Kozo SHITAGAMI
  • Patent number: 10323128
    Abstract: A method of manufacturing an electrophoretic particle is a method of manufacturing an electrophoretic particle including a particle and a particle surface treatment agent which is bonded to the particle, the method including preparing a mixture containing a plurality of the particles, the particle surface treatment agent, an unreacted product of a raw material used at the time of generating the particle surface treatment agent, and a reaction by-product generated at the time of generating the particle surface treatment agent, the mixture having a content of the particle surface treatment agent which is set to be equal to or greater than 70% by weight in the mixture except for the plurality of particles; and bonding the particle surface treatment agent to a surface of the particle in the mixture.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: June 18, 2019
    Assignee: E Ink Corporation
    Inventors: Harunobu Komatsu, Hiroki Nakahara, Masahiko Nakazawa, Takashi Hiraiwa, Kozo Shitagami
  • Patent number: 9958753
    Abstract: An electrophoresis dispersion liquid according to the aspect of the invention contains at least one type of electrophoretic particles and a dispersion medium and, in the electrophoresis dispersion liquid, the content of the electrophoretic particles is 10 weight % or more to 30 weight % or less. Furthermore, the electrophoretic particles have base particles and a polymer (particle surface treatment agent) linked with the base particles and, in the electrophoretic particles, the content of the polymer is 5 weight % or more to 15 weight % or less.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: May 1, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kozo Shitagami, Hiroki Nakahara, Harunobu Komatsu, Takashi Hiraiwa, Masahiko Nakazawa
  • Publication number: 20170235205
    Abstract: An electrophoresis dispersion liquid according to the aspect of the invention contains at least one type of electrophoretic particles and a dispersion medium and, in the electrophoresis dispersion liquid, the content of the electrophoretic particles is 10 weight % or more to 30 weight % or less. Furthermore, the electrophoretic particles have base particles and a polymer (particle surface treatment agent) linked with the base particles and, in the electrophoretic particles, the content of the polymer is 5 weight % or more to 15 weight % or less.
    Type: Application
    Filed: February 6, 2017
    Publication date: August 17, 2017
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kozo SHITAGAMI, Hiroki NAKAHARA, Harunobu KOMATSU, Takashi HIRAIWA, Masahiko NAKAZAWA
  • Publication number: 20170184939
    Abstract: An electrophoretic particle includes a base particle and a block copolymer (a particle surface treatment agent) which is bonded to the base particle (a particle), in which the block copolymer includes a dispersion portion derived from one first monomer formed of a siloxane-based compound, and a bonding portion derived from two or more second monomers having a functional group, and is bonded to the base particle with the reaction of the functional group in the bonding portion. In addition, a weight-average molecular weight of the dispersion portion is in a range of 15,000 to 150,000.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 29, 2017
    Inventors: Masahiko Nakazawa, Takashi Hiraiwa, Hiroki Nakahara, Harunobu Komatsu, Kozo Shitagami
  • Publication number: 20170158822
    Abstract: A method of manufacturing an electrophoretic particle is a method of manufacturing an electrophoretic particle including a particle and a particle surface treatment agent which is bonded to the particle, the method including preparing a mixture containing a plurality of the particles, the particle surface treatment agent, an unreacted product of a raw material used at the time of generating the particle surface treatment agent, and a reaction by-product generated at the time of generating the particle surface treatment agent, the mixture having a content of the particle surface treatment agent which is set to be equal to or greater than 70% by weight in the mixture except for the plurality of particles; and bonding the particle surface treatment agent to a surface of the particle in the mixture.
    Type: Application
    Filed: November 30, 2016
    Publication date: June 8, 2017
    Inventors: Harunobu Komatsu, Hiroki Nakahara, Masahiko Nakazawa, Takashi Hiraiwa, Kozo Shitagami
  • Publication number: 20160266462
    Abstract: An electrophoretic particle includes a particle and a coating layer, in which the coating layer includes at least one of dispersibility and chargeability, and includes a polymer that connects to the particle, where the polymer includes a first functional group and is connected to the particle via a connected body, the connected body has a molecular weight of 500 or less and includes a second functional group and a third functional group, and the particle, the connected body and the polymer are connected via the chemical bond formed by reacting the first and second functional groups and the chemical bond formed by reacting the hydroxyl group and the third functional group.
    Type: Application
    Filed: March 10, 2016
    Publication date: September 15, 2016
    Inventors: Kozo Shitagami, Kei Kamakura, Masahiko Nakazawa, Hiroki Nakahara, Harunobu Komatsu
  • Patent number: 9366936
    Abstract: An electrophoresis display apparatus of this disclosure is provided with a pair of substrates, an electrophoresis layer including electrophoresis particles and a dispersion medium in which the electrophoresis particles are dispersed, a barrier wall which is arranged between the pair of substrates and divides a cell in which the electrophoresis layer is arranged, and a sealing member which seals the electrophoresis layer arranged in the cell, in which the sealing member includes a first layer and a second layer laminated on the first layer, and in which the electric resistance of the second layer is lower than that of the first layer.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: June 14, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Kozo Shitagami, Harunobu Komatsu
  • Publication number: 20150323850
    Abstract: A method for preparing electrophoretic particles includes mixing a first compound (a compound provided with a functional group having reactivity with a hydroxyl group) or a second compound (a compound provided with a functional group having reactivity with a hydroxyl group and a polymer), and a plurality of particles to obtain a mixture, and linking the first compound or the second compound to the surface of the particles. When obtaining the mixture, the content of the first compound or the second compound in the mixture is 75% by weight or more.
    Type: Application
    Filed: May 5, 2015
    Publication date: November 12, 2015
    Inventors: Kozo Shitagami, Harunobu Komatsu, Shinobu Yokokawa
  • Publication number: 20150098123
    Abstract: An electrophoresis display apparatus of this disclosure is provided with a pair of substrates, an electrophoresis layer including electrophoresis particles and a dispersion medium in which the electrophoresis particles are dispersed, a barrier wall which is arranged between the pair of substrates and divides a cell in which the electrophoresis layer is arranged, and a sealing member which seals the electrophoresis layer arranged in the cell, in which the sealing member includes a first layer and a second layer laminated on the first layer, and in which the electric resistance of the second layer is lower than that of the first layer.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 9, 2015
    Inventors: Kozo Shitagami, Harunobu Komatsu
  • Patent number: 8815330
    Abstract: The following is included: loading cells spatially defined by partitions with a dispersion liquid containing electrophoretically mobile particles and a dispersion medium for dispersing the electrophoretically mobile particles, and covering the exposed surface of the dispersion liquid loaded in the cells with a sealing coating to seal the dispersion liquid in the cells. The dispersion medium is a lipophilic hydrocarbon solvent, and the sealing coating is made from a material containing a water-soluble polymer.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: August 26, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Kozo Shitagami, Harunobu Komatsu
  • Patent number: 8611000
    Abstract: An electro-optical display device includes a first substrate having an pixel electrode, a light-transmissive second substrate having a light-transmissive counter electrode, an electrophoretic layer interposed between the first substrate and the second substrate and having a liquid dispersion, a partition wall that defines a plurality of reservoirs containing the dispersion and a light-transmissive sealing layer that is provided between the partition wall and the counter electrode so as to seal the dispersion, and a light-transmissive hot melt conductive adhesive layer provided between the sealing layer and the counter electrode.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: December 17, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Harunobu Komatsu, Kozo Shitagami
  • Patent number: 8503066
    Abstract: An electrophoretic display device includes: a substrate; partition walls which partition a space on the substrate into a plurality of cells; an electrophoretic dispersion liquid with which the plurality of cells on the substrate is filled; a sealing film which is disposed so as to face the substrate with the partition walls interposed therebetween and seals the plurality of cells; and phase separation portions which are partially formed between upper surfaces of the partition walls and the sealing film and in which the electrophoretic dispersion liquid is subjected to phase separation.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: August 6, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Kozo Shitagami, Yasushi Yamazaki, Shinobu Yokokawa, Harunobu Komatsu, Atsushi Kitabayashi
  • Patent number: 8476828
    Abstract: An electro-optical device includes a display panel having an electro-optical layer, a first resin film stacked on the display panel to cover a first surface on the side of a display area of the display panel, and a second resin film stacked on the display panel to cover a second surface opposite the first surface, and at least one reinforcing member disposed on at least one of the first resin film and the second resin film.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: July 2, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Kenji Hayashi, Kozo Shitagami, Misako Kezuka
  • Patent number: 8331016
    Abstract: An electrophoretic display includes a substrate, first electrodes arranged on the substrate, an electrophoretic layer arranged on the substrate so as to cover the first electrodes, a partition wall that divides the electrophoretic layer into a plurality of cells, and a second electrode arranged on the electrophoretic layer. The electrophoretic layer has electrophoretic particles and a dispersion medium that disperses the electrophoretic particles. The second electrode protrudes towards the first electrodes at the cell.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: December 11, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Kozo Shitagami, Harunobu Komatsu
  • Publication number: 20120099181
    Abstract: An electrophoretic display device includes: a substrate; partition walls which partition a space on the substrate into a plurality of cells; an electrophoretic dispersion liquid with which the plurality of cells on the substrate is filled; a sealing film which is disposed so as to face the substrate with the partition walls interposed therebetween and seals the plurality of cells; and phase separation portions which are partially formed between upper surfaces of the partition walls and the sealing film and in which the electrophoretic dispersion liquid is subjected to phase separation.
    Type: Application
    Filed: September 16, 2011
    Publication date: April 26, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kozo SHITAGAMI, Yasushi YAMAZAKI, Shinobu YOKOKAWA, Harunobu KOMATSU, Atsushi KITABAYASHI
  • Publication number: 20120062981
    Abstract: An electro-optical display device includes a first substrate having an pixel electrode, a light-transmissive second substrate having a light-transmissive counter electrode, an electrophoretic layer interposed between the first substrate and the second substrate and having a liquid dispersion, a partition wall that defines a plurality of reservoirs containing the dispersion and a light-transmissive sealing layer that is provided between the partition wall and the counter electrode so as to seal the dispersion, and a light-transmissive hot melt conductive adhesive layer provided between the sealing layer and the counter electrode.
    Type: Application
    Filed: August 8, 2011
    Publication date: March 15, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Harunobu KOMATSU, Kozo SHITAGAMI
  • Publication number: 20110304904
    Abstract: An electrophoretic display includes a substrate, first electrodes arranged on the substrate, an electrophoretic layer arranged on the substrate so as to cover the first electrodes, a partition wall that divides the electrophoretic layer into a plurality of cells, and a second electrode arranged on the electrophoretic layer. The electrophoretic layer has electrophoretic particles and a dispersion medium that disperses the electrophoretic particles. The second electrode protrudes towards the first electrodes at the cell.
    Type: Application
    Filed: May 27, 2011
    Publication date: December 15, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kozo SHITAGAMI, Harunobu KOMATSU