Patents by Inventor Naoki Sakumoto

Naoki Sakumoto 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: 11112654
    Abstract: A liquid crystal display device, which includes a first substrate and a second substrate disposed to face each other with a liquid crystal sandwiched therebetween. The first substrate is an electrode-provided substrate having a first electrode and a plurality of second electrodes overlaid on the first electrode via an insulating film, formed on a pixel region on a surface on the liquid crystal side, where one of the first electrode and the second electrodes is a pixel electrode and the other is a counter electrode, having a first liquid crystal alignment film formed on the surface on the liquid crystal side of the first substrate covered with the second electrodes. The second substrate is a substrate having a second liquid crystal alignment film formed on a surface on the liquid crystal side, the second liquid crystal alignment film containing a photosensitive side chain type polymer which develops liquid crystallinity.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: September 7, 2021
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Atsuhiko Mandai, Naoki Sakumoto
  • Patent number: 10336865
    Abstract: To provide a liquid crystal aligning agent to obtain a liquid crystal alignment film which has favorable seal adhesion and a favorable residual image property, and which is excellent in removability of a decomposed product formed after irradiation with ultraviolet rays. A liquid crystal aligning agent containing at least one polymer selected from the group consisting of a polyimide precursor having structural units represented by the formula (1) and structural units represented by the formula (2) and an imidized polymer of the polyimide precursor: wherein X1 and X2 are a tetravalent organic group, Y1 and Y2 are a bivalent organic group, and R1 and R2 are a hydrogen atom or a C1-5 alkyl group.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: July 2, 2019
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Naho Kunimi, Naoki Sakumoto, Atsuhiko Mandai
  • Publication number: 20180284543
    Abstract: To provide an in-plane switching mode liquid crystal display device having favorable alignment property and electrical properties.
    Type: Application
    Filed: September 28, 2016
    Publication date: October 4, 2018
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Atsuhiko MANDAI, Naoki SAKUMOTO
  • Patent number: 10011772
    Abstract: To provide a liquid crystal aligning agent to obtain a liquid crystal alignment film which is excellent in the adhesion to a sealing agent and in the liquid crystal alignment property. A liquid crystal aligning agent containing at least one polymer selected from the group consisting of a polyimide precursor having structural units represented by the formula (1) and structural units represented by the formula (3) and an imidized polymer of the polyimide precursor: wherein X1 and X4 are a tetravalent organic group, Y1 is a bivalent organic group having a thermally-leaving group, Y2 is a bivalent organic group, R1 and R2 are a hydrogen atom or a C1-5 alkyl group, and Z1 and Z2 are a hydrogen atom, or a C1-10 alkyl group, C2-10 alkenyl group or C2-10 alkynyl group which may have a substituent.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: July 3, 2018
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Naho Kunimi, Naoki Sakumoto, Atsuhiko Mandai
  • Patent number: 9976086
    Abstract: To provide a liquid crystal aligning agent to obtain a liquid crystal alignment film which is excellent in the adhesion to a sealing agent and a substrate of a liquid crystal display device, and of which a decomposed product formed after irradiation with ultraviolet rays will easily be removed. A liquid crystal aligning agent containing at least one polymer selected from the group consisting of a polyimide precursor having a bond represented by the following formula (1) in its main chain and an imidized polymer of the polyimide precursor: wherein each of R1, R2, R3 and R4 which are independent of one another, is a hydrogen atom or a C1-20 monovalent hydrocarbon group which may have a substituent, and D is a protecting group to be replaced with a hydrogen atom by heat.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: May 22, 2018
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Naho Kunimi, Naoki Sakumoto, Atsuhiko Mandai
  • Publication number: 20160264867
    Abstract: To provide a liquid crystal aligning agent to obtain a liquid crystal alignment film which is excellent in the adhesion to a sealing agent and a substrate of a liquid crystal display device, and of which a decomposed product formed after irradiation with ultraviolet rays will easily be removed. A liquid crystal aligning agent containing at least one polymer selected from the group consisting of a polyimide precursor having a bond represented by the following formula (1) in its main chain and an imidized polymer of the polyimide precursor: wherein each of R1, R2, R3 and R4 which are independent of one another, is a hydrogen atom or a C1-20 monovalent hydrocarbon group which may have a substituent, and D is a protecting group to be replaced with a hydrogen atom by heat.
    Type: Application
    Filed: October 22, 2014
    Publication date: September 15, 2016
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naho KUNIMI, Naoki SAKUMOTO, Atsuhiko MANDAI
  • Publication number: 20160244566
    Abstract: To provide a liquid crystal aligning agent to obtain a liquid crystal alignment film which has favorable seal adhesion and a favorable residual image property, and which is excellent in removability of a decomposed product formed after irradiation with ultraviolet rays. A liquid crystal aligning agent containing at least one polymer selected from the group consisting of a polyimide precursor having structural units represented by the formula (1) and structural units represented by the formula (2) and an imidized polymer of the polyimide precursor: wherein X1 and X2 are a tetravalent organic group, Y1 and Y2 are a bivalent organic group, and R1 and R2 are a hydrogen atom or a C1-5 alkyl group.
    Type: Application
    Filed: October 22, 2014
    Publication date: August 25, 2016
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naho KUNIMI, Naoki SAKUMOTO, Atsuhiko MANDAI
  • Publication number: 20160244673
    Abstract: To provide a liquid crystal aligning agent to obtain a liquid crystal alignment film which is excellent in the adhesion to a sealing agent and in the liquid crystal alignment property. A liquid crystal aligning agent containing at least one polymer selected from the group consisting of a polyimide precursor having structural units represented by the formula (1) and structural units represented by the formula (3) and an imidized polymer of the polyimide precursor: wherein X1 and X4 are a tetravalent organic group, Y1 is a bivalent organic group having a thermally-leaving group, Y2 is a bivalent organic group, R1 and R2 are a hydrogen atom or a C1-5 alkyl group, and Z1 and Z2 are a hydrogen atom, or a C1-10 alkyl group, C2-10 alkenyl group or C2-10 alkynyl group which may have a substituent.
    Type: Application
    Filed: October 22, 2014
    Publication date: August 25, 2016
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Naho KUNIMI, Naoki SAKUMOTO, Atsuhiko MANDAI
  • Patent number: 9257576
    Abstract: A coating film forming composition includes an amino acid generator including a protecting group that is eliminated to generate an amino acid. A coating film forming composition includes a component (A): the amino acid generator; a component (B): a hydrolyzable silane, a hydrolysis product thereof, a hydrolysis-condensation product thereof, or a mixture thereof; and a component (C): a solvent.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: February 9, 2016
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Taku Kato, Junpei Kobayashi, Satoko Takano, Naoki Sakumoto
  • Patent number: 8829153
    Abstract: To provide a polyamic acid ester-containing polyimide precursor composition having a good storage stability, from which a polyimide film having a high imidization degree and excellent adhesion to an inorganic substrate can be obtained. A polyimide precursor composition comprising a polyamic acid ester, a thermal imidization accelerator and a solvent, wherein the thermal imidization accelerator is a compound which has a carboxy group and an amino group or an imino group which is deprotected by heat to show basicity, and which will not accelerate the imidization of the polyamic acid ester before the protecting group leaves, and a polyimide precursor composition containing a silane coupling agent.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: September 9, 2014
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Naoki Sakumoto, Masato Nagao, Yuho Noguchi
  • Publication number: 20130313669
    Abstract: A coating film forming composition includes an amino acid generator including a protecting group that is eliminated to generate an amino acid. A coating film forming composition includes a component (A): the amino acid generator; a component (B): a hydrolyzable silane, a hydrolysis product thereof, a hydrolysis-condensation product thereof, or a mixture thereof; and a component (C): a solvent.
    Type: Application
    Filed: July 15, 2013
    Publication date: November 28, 2013
    Applicant: Nissan Chemical Industries, Ltd.
    Inventors: Taku KATO, Junpei KOBAYASHI, Satoko TAKANO, Naoki SAKUMOTO
  • Publication number: 20120101236
    Abstract: To provide a polyamic acid ester-containing polyimide precursor composition having a good storage stability, from which a polyimide film having a high imidization degree and excellent adhesion to an inorganic substrate can be obtained. A polyimide precursor composition comprising a polyamic acid ester, a thermal imidization accelerator and a solvent, wherein the thermal imidization accelerator is a compound which has a carboxy group and an amino group or an imino group which is deprotected by heat to show basicity, and which will not accelerate the imidization of the polyamic acid ester before the protecting group leaves, and a polyimide precursor composition containing a silane coupling agent.
    Type: Application
    Filed: April 1, 2010
    Publication date: April 26, 2012
    Applicant: Nissan Chemical Industries, Ltd.
    Inventors: Naoki Sakumoto, Masato Nagao, Yuho Noguchi
  • Publication number: 20110073977
    Abstract: There is provided an amino acid generator comprising a protecting group for an amino group that is eliminated to generate an amino acid, and a coating film forming composition using the amino acid generator and a polysiloxane composition containing the amino acid generator. A coating film forming composition comprising: a component (A): an amino acid generator comprising a protecting group that is eliminated to generate an amino acid, which is a compound of Formula (1): D-A (1) where D is a protecting group for an amino group, and A is an organic group remaining after subtracting hydrogen atoms from an amino group of an amino acid; a component (B): a hydrolyzable silane, a hydrolysis product thereof, a hydrolysis-condensation product thereof, or a mixture thereof; and a component (C): a solvent.
    Type: Application
    Filed: May 19, 2009
    Publication date: March 31, 2011
    Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Taku Kato, Junpei Kobayashi, Satoko Takano, Naoki Sakumoto