Patents by Inventor Yusuke Yamagata

Yusuke Yamagata 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: 10875937
    Abstract: An object of the present disclosure is to provide a terminal-modified conjugated dime polymer capable of improving fracture resistance of a rubber article. Specifically, a terminal-modified conjugated diene polymer is characterized in that a content of catalyst residue therein derived from a catalyst used in polymerization is less than 60 ppm.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: December 29, 2020
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Yusuke Yamagata, Shojiro Kaita, Shigenaga Takano
  • Publication number: 20190375923
    Abstract: A method, of the present disclosure, of producing a modified conjugated diene-based polymer includes a polymerization reaction process of polymerizing a conjugated diene monomer in the presence of a polymerization catalyst composition to obtain a conjugated diene-based polymer, an organic metal compound adding process of adding an organic metal compound after the polymerization reaction process, and a modification reaction process of modifying the conjugated diene-based polymer with a modifying agent after the organic metal compound adding process. A rubber composition of the present disclosure includes a modified conjugated diene-based polymer produced by the method. A tire of the present disclosure includes the rubber composition.
    Type: Application
    Filed: August 15, 2019
    Publication date: December 12, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yusuke YAMAGATA, Shojiro KAITA, Tomoe TANABE
  • Publication number: 20190161571
    Abstract: An object of the present disclosure is to provide a terminal-modified conjugated diene polymer having a high cis-1,4 content and a low molecular weight distribution value and being excellent in durability (such as wear resistance, fracture resistance, cracking resistance, and the like). In order to achieve the object, a terminal-modified conjugated diene polymer of the present disclosure characteristically has: molecular weight distribution determined by gel permeation chromatography (GPC) of less than 2; and content of cis-1,4 bond of 95% or more.
    Type: Application
    Filed: March 29, 2017
    Publication date: May 30, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yusuke YAMAGATA, Shojiro KAITA, Shigenaga TAKANO
  • Publication number: 20190153123
    Abstract: An object of the present disclosure is to provide a terminal-modified conjugated diene polymer capable of improving fracture resistance of a rubber article. Specifically, a terminal-modified conjugated diene polymer is characterized in that a content of catalyst residue therein derived from a catalyst used in polymerization is less than 60 ppm.
    Type: Application
    Filed: April 27, 2017
    Publication date: May 23, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yusuke YAMAGATA, Shojiro KAITA, Shigenaga TAKANO
  • Patent number: 10290662
    Abstract: A substrate for a display device, includes: an insulation substrate; an insulation film, which is formed on the insulation substrate and is primarily made of one of silicon oxide and oxidized metal; an inorganic film, which is formed to be in direct contact with the insulation film and has an insulator part that is formed by changing oxide semiconductor into insulator; and a wiring film, which is formed to be in direct contact with the insulator part.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: May 14, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshihiko Iwasaka, Yusuke Yamagata, Kazunori Inoue
  • Patent number: 10239964
    Abstract: A method for manufacturing a conjugated diene polymer that can increase the robustness of a polymerization reaction system is provided. Also, a conjugated diene polymer, with a high cis-1,4-bond content, that is manufactured by this method for manufacturing is provided. A method for manufacturing a conjugated diene polymer includes polymerizing a conjugated diene monomer using a polymerization catalyst composition including a rare earth element compound and a compound having a cyclopentadiene skeleton, and a conjugated diene polymer manufactured with this method for manufacturing has a cis-1,4-bond content of 95% or greater.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: March 26, 2019
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Yusuke Yamagata, Narukuni Hirata, Tomoe Tanabe, Shojiro Kaita, Madoka Kimura
  • Publication number: 20190055395
    Abstract: Provided is a rubber composition that contains a rubber component having excellent cold flow resistance and has improved low loss property and wear resistance as compared to conventional ones. The rubber composition comprises: a modified conjugated diene-based polymer having a hydroxyl group at a terminal; and at least one of a natural rubber or a polyisoprene rubber. The modified conjugated diene-based polymer preferably has a cis-1,4 bond content of 95% or more; the modified conjugated diene-based polymer preferably has a molecular weight distribution (Mw/Mn) of 2.5 or less; and a content of the modified conjugated diene-based polymer in a rubber component is preferable to be 20 mass % or more.
    Type: Application
    Filed: January 13, 2017
    Publication date: February 21, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yusuke YAMAGATA, Shojiro KAITA
  • Patent number: 10131722
    Abstract: This disclosure is to provide a method for preparing a terminal-modified conjugated diene polymer which achieves an extremely high compounding amount of cis-1,4 without complicated preparing conditions, a terminal-modified conjugated diene polymer obtained via the method, a rubber composition containing the terminal-modified conjugated diene polymer, and a tire using the rubber composition.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: November 20, 2018
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Narukuni Hirata, Yusuke Yamagata, Tomoe Tanabe, Shojiro Kaita
  • Publication number: 20180298118
    Abstract: Provided is a polymerization catalyst composition capable of producing a conjugated diene polymer having a high cis-1,4 bond content or a conjugated diene-based copolymer having a high 1,4 bond content. The polymerization catalyst composition comprises: a Component (A) being a rare earth element compound represented by the following general formula (a-1): M-(AQ1)(AQ2)(AQ3), where M is selected from scandium, yttrium or lanthanoid elements; AQ1, AQ2 and AQ3 are the same or different functional groups; A is nitrogen, oxygen or sulfur; and the Component (A) has at least one M-A bond; a Component (B) being an ionic compound; and a Component (C) being a compound containing a cyclopentadiene skeleton selected from substituted or unsubstituted cyclopentadienes, substituted or unsubstituted indenes, or substituted or unsubstituted fluorenes.
    Type: Application
    Filed: November 7, 2016
    Publication date: October 18, 2018
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yusuke YAMAGATA, Aya YANAGISAWA
  • Patent number: 10074722
    Abstract: The present technique relates to a transistor that uses an oxide semiconductor as its channel layer and that is capable of suppressing fluctuations in threshold voltage, and to a thin-film transistor substrate and a liquid crystal display that include such a transistor. The transistor is configured such that an overlap length, which is a length of overlap in plan view between the source electrode and the channel protective film in a direction from the source electrode toward the drain electrode, is longer than an overlap length, which is a length of overlap in plan view between the drain electrode and the channel protective film in a direction from the drain electrode toward the source electrode.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: September 11, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Rii Hirano, Yusuke Yamagata, Naoki Nakagawa
  • Patent number: 10042196
    Abstract: The insulating properties of terminal lines on an array substrate can be maintained without adding any steps for avoiding formation of a counter electrode on the peripheral portion of a color filter substrate. A display includes an insulation film formed to cover an electrode formed on a surface of an array substrate, an oxide semiconductor film formed on a surface of a color filter substrate, and a seal member that is located between the insulation film and the oxide semiconductor film, which face each other, and that bonds the insulation film and the oxide semiconductor film together. An area surrounded by the seal member in plan view is taken as a display area. A portion of the oxide semiconductor film that corresponds to the display area is a conductor, and a portion of the oxide semiconductor film that corresponds to the outside of the display area is an insulator.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: August 7, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshihiko Iwasaka, Masaru Aoki, Kazunori Inoue, Yusuke Yamagata
  • Publication number: 20180052356
    Abstract: The insulating properties of terminal lines on an array substrate can be maintained without adding any steps for avoiding formation of a counter electrode on the peripheral portion of a color filter substrate. A display includes an insulation film formed to cover an electrode formed on a surface of an array substrate, an oxide semiconductor film formed on a surface of a color filter substrate, and a seal member that is located between the insulation film and the oxide semiconductor film, which face each other, and that bonds the insulation film and the oxide semiconductor film together. An area surrounded by the seal member in plan view is taken as a display area. A portion of the oxide semiconductor film that corresponds to the display area is a conductor, and a portion of the oxide semiconductor film that corresponds to the outside of the display area is an insulator.
    Type: Application
    Filed: June 21, 2016
    Publication date: February 22, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Toshihiko IWASAKA, Masaru AOKI, Kazunori INOUE, Yusuke YAMAGATA
  • Publication number: 20180026103
    Abstract: The present technique relates to a transistor that uses an oxide semiconductor as its channel layer and that is capable of suppressing fluctuations in threshold voltage, and to a thin-film transistor substrate and a liquid crystal display that include such a transistor. The transistor is configured such that an overlap length, which is a length of overlap in plan view between the source electrode and the channel protective film in a direction from the source electrode toward the drain electrode, is longer than an overlap length, which is a length of overlap in plan view between the drain electrode and the channel protective film in a direction from the drain electrode toward the source electrode.
    Type: Application
    Filed: April 14, 2016
    Publication date: January 25, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Rii HIRANO, Yusuke YAMAGATA, Naoki NAKAGAWA
  • Publication number: 20170275400
    Abstract: This disclosure is to provide a method for preparing a terminal-modified conjugated diene polymer which achieves an extremely high compounding amount of cis-1,4 without complicated preparing conditions, a terminal-modified conjugated diene polymer obtained via the method, a rubber composition containing the terminal-modified conjugated diene polymer, and a tire using the rubber composition.
    Type: Application
    Filed: July 2, 2015
    Publication date: September 28, 2017
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Narukuni HIRATA, Yusuke YAMAGATA, Tomoe TANABE, Shojiro KAITA
  • Publication number: 20170233504
    Abstract: A method for manufacturing a conjugated diene polymer that can increase the robustness of a polymerization reaction system is provided. Also, a conjugated diene polymer, with a high cis-1,4-bond content, that is manufactured by this method for manufacturing is provided. A method for manufacturing a conjugated diene polymer includes polymerizing a conjugated diene monomer using a polymerization catalyst composition including a rare earth element compound and a compound having a cyclopentadiene skeleton, and a conjugated diene polymer manufactured with this method for manufacturing has a cis-1,4-bond content of 95% or greater.
    Type: Application
    Filed: July 2, 2015
    Publication date: August 17, 2017
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Yusuke YAMAGATA, Narukuni HIRATA, Tomoe TANABE, Shojiro KAITA, Madoka KIMURA
  • Patent number: 9726946
    Abstract: A liquid crystal display device includes an electrode configuration layer provided on a support substrate, the electrode configuration layer includes a stripe region having a plurality of electrode regions and a plurality of insulator regions arranged in an alternating manner, and the electrode regions and the insulator regions are formed by partially performing a reduction treatment or an oxidation treatment on a layer made of one material, thereby controlling conductivity. Further, the electrode regions are included in at least one of the pixel electrode and the counter electrode of the liquid crystal display device.
    Type: Grant
    Filed: May 25, 2015
    Date of Patent: August 8, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yusuke Yamagata, Manabu Iwakawa, Toshihiro Yamashita, Koji Oda, Kazunori Inoue
  • Publication number: 20170170204
    Abstract: A substrate for a display device, includes: an insulation substrate; an insulation film, which is formed on the insulation substrate and is primarily made of one of silicon oxide and oxidized metal; an inorganic film, which is formed to be in direct contact with the insulation film and has an insulator part that is formed by changing oxide semiconductor into insulator; and a wiring film, which is formed to be in direct contact with the insulator part.
    Type: Application
    Filed: November 29, 2016
    Publication date: June 15, 2017
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Toshihiko IWASAKA, Yusuke YAMAGATA, Kazunori INOUE
  • Publication number: 20170052402
    Abstract: A liquid crystal display device includes an electrode configuration layer provided on a support substrate, the electrode configuration layer includes a stripe region having a plurality of electrode regions and a plurality of insulator regions arranged in an alternating manner, and the electrode regions and the insulator regions are formed by partially performing a reduction treatment or an oxidation treatment on a layer made of one material, thereby controlling conductivity. Further, the electrode regions are included in at least one of the pixel electrode and the counter electrode of the liquid crystal display device.
    Type: Application
    Filed: May 25, 2015
    Publication date: February 23, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yusuke YAMAGATA, Manabu IWAKAWA, Toshihiro YAMASHITA, Koji ODA, Kazunori INOUE
  • Patent number: 9314673
    Abstract: A golf ball having a good rebound and excellent flight performance can be obtained using a golf ball composition which contains a diene polymer having an aluminum catalyst residue content of not more than 650 ppm.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: April 19, 2016
    Assignees: BRIDGESTONE SPORTS CO., LTD, BRIDGESTONE CORPORATION
    Inventors: Hideo Takeichi, Takashi Ohira, Yuichiro Ozawa, Tsuyoshi Nakajima, Satoru Tamaki, Yusuke Yamagata, Teppei Mori
  • Patent number: RE49718
    Abstract: A substrate for a display device, includes: an insulation substrate; an insulation film, which is formed on the insulation substrate and is primarily made of one of silicon oxide and oxidized metal; an inorganic film, which is formed to be in direct contact with the insulation film and has an insulator part that is formed by changing oxide semiconductor into insulator; and a wiring film, which is formed to be in direct contact with the insulator part.
    Type: Grant
    Filed: May 14, 2021
    Date of Patent: October 31, 2023
    Assignee: Trivale Technologies
    Inventors: Toshihiko Iwasaka, Yusuke Yamagata, Kazunori Inoue