Patents by Inventor Takeshi Sekiguchi

Takeshi Sekiguchi 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: 20210122863
    Abstract: Provided is a particle suitable for a specimen test, which has high sensitization efficiency in a reaction with an antibody, shows high detection sensitivity as a latex reagent, hardly agglutinates during its storage, and hardly causes nonspecific adsorption even when not post-coated. The particle is a particle including a copolymer containing a monomer unit derived from a styrene-based monomer and a monomer unit derived from a glycidyl group-containing monomer, the particle being represented by the following general formula (1): in the general formula (1), L1 represents a copolymer moiety containing the monomer unit derived from the styrene-based monomer and the monomer unit derived from the glycidyl group-containing monomer, ā€œnā€ represents from 4 to 11, and R1 and R2 each represent a hydrogen atom, an alkyl group, or a halogen.
    Type: Application
    Filed: October 19, 2020
    Publication date: April 29, 2021
    Inventors: Takeshi Sekiguchi, Kengo Kanazaki
  • Publication number: 20200407572
    Abstract: A heat sensitive transfer sheet that achieves high optical density and high light resistance without generating scumming. The heat sensitive sheet has a base material and a coloring material layer formed on the base material, and the coloring material layer includes a compound represented by the following formula (1) and a particular dye compound: wherein R11 and R13 each independently represent a hydrogen atom, an alkyl group, an aralkyl group, an unsubstituted aryl group or an aryl group having a substituent; and R12 and R14 to R18 each independently represent a hydrogen atom or an alkyl group.
    Type: Application
    Filed: June 23, 2020
    Publication date: December 31, 2020
    Inventors: Takeshi Sekiguchi, Akiko Kitao, Ai Hayakawa
  • Patent number: 10808059
    Abstract: To determine and detect 8-oxo-2?-deoxyguanosine in an aqueous sample solution with high sensitivity and specifically, provided is a polymer including a repetition structure represented by any one of the following general formulae 2 to 5, in which a group represented by any one of the following general formulae 6 to 11 is linked to the repetition structure represented by any one of the following general formulae 2 to 5 through a divalent linking group L.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: October 20, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yutaka Tani, Takeshi Sekiguchi, Keigo Mizusawa, Ryuji Higashi, Masaru Sugita, Isao Kawata
  • Patent number: 10400085
    Abstract: Provided are an electron beam curable resin composition including an olefin resin, a crosslinking agent, and a white pigment, in which the crosslinking agent has a saturated or unsaturated ring structure, at least one atom among atoms forming at least one ring is bonded to any allylic substituent of an allyl group, a methallyl group, an allyl group through a linking group, and a methallyl group through a linking group, and the white pigment is blended in an amount of more than 200 parts by mass and 500 parts by mass or less with respect to 100 parts by mass of olefin resin, a reflector resin frame using the resin composition, a reflector, a semiconductor light-emitting device, and a molding method using the resin composition.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: September 3, 2019
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Aki Kimura, Katsuya Sakayori, Toshiyuki Sakai, Toshimasa Takarabe, Kei Amagai, Kazunori Oda, Megumi Ooishi, Takeshi Sekiguchi, Kenzaburou Kawai, Kurumi Hashimoto
  • Publication number: 20180355086
    Abstract: To determine and detect 8-oxo-2?-deoxyguanosine in an aqueous sample solution with high sensitivity and specifically, provided is a polymer including a repetition structure represented by any one of the following general formulae 2 to 5, in which a group represented by any one of the following general formulae 6 to 11 is linked to the repetition structure represented by any one of the following general formulae 2 to 5 through a divalent linking group L.
    Type: Application
    Filed: May 31, 2018
    Publication date: December 13, 2018
    Inventors: Yutaka Tani, Takeshi Sekiguchi, Keigo Mizusawa, Ryuji Higashi, Masaru Sugita, Isao Kawata
  • Patent number: 9976034
    Abstract: A coloring compound with a structure represented by the following formula (1): wherein R1 to R3 independently denote a hydrogen atom, an unsubstituted amino group, or an amino group with a substituent, R4 to R6 independently denote a hydrogen atom, an alkyl group, an unsubstituted aryl group, or an aryl group with a substituent, A1 to A3 independently denote a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a carbamoyl group, an alkoxycarbonyl group, a carboxylic acid amide group, an alkoxysulfonyl group, a sulfonic acid amide group, a trifluoromethyl group, a cyano group, a hydroxy group, a nitro group, an amino group, or a halogen atom, and the aryl group, the carboxylic acid amide group, the sulfonic acid amide group, and the amino group in A1 to A3 may have a substituent, and n denotes an integer in the range of 1 to 5.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: May 22, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Sekiguchi
  • Publication number: 20180118944
    Abstract: A coloring compound with a structure represented by the following formula (1): wherein R1 to R3 independently denote a hydrogen atom, an unsubstituted amino group, or an amino group with a substituent, R4 to R6 independently denote a hydrogen atom, an alkyl group, an unsubstituted aryl group, or an aryl group with a substituent, A1 to A3 independently denote a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a carbamoyl group, an alkoxycarbonyl group, a carboxylic acid amide group, an alkoxysulfonyl group, a sulfonic acid amide group, a trifluoromethyl group, a cyano group, a hydroxy group, a nitro group, an amino group, or a halogen atom, and the aryl group, the carboxylic acid amide group, the sulfonic acid amide group, and the amino group in A1 to A3 may have a substituent, and n denotes an integer in the range of 1 to 5.
    Type: Application
    Filed: October 24, 2017
    Publication date: May 3, 2018
    Inventor: Takeshi Sekiguchi
  • Publication number: 20180095374
    Abstract: A mixture contains a compound having a specific structure and acting as a dye and a compound having a specific structure and acting as an ultraviolet light absorbent.
    Type: Application
    Filed: September 27, 2017
    Publication date: April 5, 2018
    Inventor: Takeshi Sekiguchi
  • Patent number: 9910196
    Abstract: The present invention provides a dye compound excellent in both chroma and light fastness, an ink, and a resist composition for a color filter. The present invention provides an ink and a resist composition for a color filter, in which each of the ink and the resist composition contains a pyridone azo compound having a specific structure.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: March 6, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Sekiguchi, Shosei Mori, Taichi Shintou, Takeshi Miyazaki
  • Patent number: 9910375
    Abstract: A yellow toner is provided. The yellow toner includes toner particles containing a binder resin and a colorant containing at least one compound selected the group consisting of compounds given by the following formulae (1), (2), and (3) for used in a recording method such as an electrophotographic method, an electrostatic recording method, a magnetic recording method, or a toner jet method, and to a method for producing the toner: wherein in the formulae (1), (2), and (3) the R groups are as set forth in the specification.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: March 6, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Sekiguchi, Shosei Mori
  • Patent number: 9857711
    Abstract: Provided is a toner including toner particles each containing: a binder resin, a crystalline polyester, and a colorant, in which: the colorant includes a compound represented by the following formula (1); and the binder resin and the crystalline polyester satisfy the following formula (2): in the formula (1), R1, R2, and R3 each independently represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and Ar represents an aryl group. ?SP=|SP1?SP2|?0.43??Formula (2).
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: January 2, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yu Yoshida, Masashi Kawamura, Yuhei Terui, Takayuki Toyoda, Takeshi Sekiguchi
  • Patent number: 9811014
    Abstract: Provided is a toner having high coloring power and being excellent in light fastness. Specifically, provided is a yellow toner, including at least: a binder resin; a wax; and a colorant, in which the colorant contains a compound represented by the general formula (1).
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: November 7, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shosei Mori, Takeshi Sekiguchi, Taichi Shintou, Takeshi Miyazaki
  • Patent number: 9658553
    Abstract: The present invention provides a toner excellent in both saturation and light resistance. The toner includes toner particles containing a binder resin and a colorant. The colorant is a pyridoneazo compound having a specific structure.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: May 23, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Sekiguchi, Shosei Mori, Taichi Shintou, Takeshi Miyazaki
  • Patent number: 9580576
    Abstract: Provided is a pigment dispersion excellent in the dispersibility of C.I. Pigment yellow 185. The pigment dispersion includes C.I.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: February 28, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shosei Mori, Takeshi Sekiguchi, Taichi Shintou, Yuko Katsumoto, Takayuki Ujifusa, Takeshi Miyazaki
  • Publication number: 20160363879
    Abstract: This invention provides a toner excellent in color development properties. The purpose can be achieved by using a toner containing a compound having a specific structure.
    Type: Application
    Filed: June 8, 2016
    Publication date: December 15, 2016
    Inventors: Akira Tsuboyama, Akiko Kitao, Takeshi Sekiguchi
  • Publication number: 20160349646
    Abstract: Provided is a toner including toner particles each containing: a binder resin, a crystalline polyester, and a colorant, in which: the colorant includes a compound represented by the following formula (1); and the binder resin and the crystalline polyester satisfy the following formula (2): in the formula (1), R1, R2, and R3 each independently represent a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and Ar represents an aryl group. ?SP=|SP1?SP2|?0.
    Type: Application
    Filed: May 9, 2016
    Publication date: December 1, 2016
    Inventors: Yu Yoshida, Masashi Kawamura, Yuhei Terui, Takayuki Toyoda, Takeshi Sekiguchi
  • Publication number: 20160349647
    Abstract: A yellow toner is provided. The yellow toner includes toner particles containing a binder resin and a colorant. The colorant contains at least one compound selected from the group consisting of compounds expressed by formulas (1) to (3).
    Type: Application
    Filed: May 24, 2016
    Publication date: December 1, 2016
    Inventors: Takeshi Sekiguchi, Shosei Mori
  • Publication number: 20160238756
    Abstract: The present invention provides a dye compound excellent in both chroma and light fastness, an ink, and a resist composition for a color filter. The present invention provides an ink and a resist composition for a color filter, in which each of the ink and the resist composition contains a pyridone azo compound having a specific structure.
    Type: Application
    Filed: September 24, 2014
    Publication date: August 18, 2016
    Inventors: Takeshi Sekiguchi, Shosei Mori, Taichi Shintou, Takeshi Miyazaki
  • Patent number: 9418653
    Abstract: An operation assisting method comprising comparing input spoken voices with a preliminarily stored keyword associated with an operation target and determining whether or not the keyword is spoken, determining whether or not similarity between or among the input spoken voices falls within a predetermined range. In a case where it is determined that the keyword is not spoken, determining whether or not eyes of a user are directed at the operation target, and in a case of the similarity falling within the predetermined range, determining that the keyword is spoken, in a case of being determined that the eyes of the user are directed at the operation target.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: August 16, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takeshi Sekiguchi, Nobuyuki Kunieda
  • Publication number: 20160216625
    Abstract: The present invention provides a toner excellent in both saturation and light resistance. The toner includes toner particles containing a binder resin and a colorant. The colorant is a pyridoneazo compound having a specific structure.
    Type: Application
    Filed: September 24, 2014
    Publication date: July 28, 2016
    Inventors: Takeshi Sekiguchi, Shosei Mori, Taichi Shintou, Takeshi Miyazaki