Patents by Inventor Kazunari Yasumura

Kazunari Yasumura 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).

  • Resin Composition
    Publication number: 20230331888
    Abstract: Provided is a novel epoxy composition (modified epoxy resin). The composition comprises an acrylic resin and an epoxy resin comprising an alicyclic epoxy resin.
    Type: Application
    Filed: July 20, 2021
    Publication date: October 19, 2023
    Applicant: Nippon Shokubai Co., Ltd.
    Inventors: Kazunari Yasumura, Fuyuko Namimoto
  • Viscosity index improver and lubricating oil composition
    Patent number: 10982167
    Abstract: A viscosity index improver comprising a copolymer having a unit (a) derived from a maleimide monomer and a unit (b) derived from a macromonomer, wherein viscosity measured by the following method is 8000 mPa·s or less. Viscosity measurement method: A solution composed of 78 mass % of a Group III base oil (viscosity index: 122, kinematic viscosity at 40° C.: 19.6 mm2/s) on the American Petroleum Institute (API) classification and 22 mass % of the copolymer is measured with a viscometer (TVB-10 manufactured by Toki Sangyo Co., Ltd., rotor: SPINDLE No. M3, rotation speed: 6 rpm) at 25° C.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: April 20, 2021
    Assignee: NIPPON SHOKUBAI CO., LTD.
    Inventors: Yohei Imaizumi, Keiko Izumi, Kazunari Yasumura, Daisuke Matsui
  • Viscosity index improver, method for producing the same and lubricating oil composition
    Patent number: 10443013
    Abstract: A viscosity index improver comprising a polymer which has a high viscosity index and good shear stability and which exhibits sufficient solubility in a lubricating base oil, a process for producing the same, and a lubricating oil composition containing the viscosity index improver are provided, wherein the viscosity index improver comprising a polymer satisfying the following (1) to (4): (1) weight-average molecular weight (Mw) of 200,000 or more and 600,000 or less; (2) number-average molecular weight (Mn) of 90,000 or more; (3) molecular weight distribution (Mw/Mn) of 4.0 or less; and (4) branching degree of 1.0 or more.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: October 15, 2019
    Assignee: NIPPON SHOKUBAI CO., LTD.
    Inventors: Tadayoshi Ugamura, Kazunari Yasumura, Keiko Izumi
  • VISCOSITY INDEX IMPROVER AND LUBRICATING OIL COMPOSITION
    Publication number: 20190211281
    Abstract: A viscosity index improver comprising a copolymer having a unit (a) derived from a maleimide monomer and a unit (b) derived from a macromonomer, wherein viscosity measured by the following method is 8000 mPa·s or less. Viscosity measurement method: A solution composed of 78 mass % of a Group III base oil (viscosity index: 122, kinematic viscosity at 40° C.: 19.6 mm2/s) on the American Petroleum Institute (API) classification and 22 mass % of the copolymer is measured with a viscometer (TVB-10 manufactured by Toki Sangyo Co., Ltd., rotor: SPINDLE No. M3, rotation speed: 6 rpm) at 25° C.
    Type: Application
    Filed: September 20, 2017
    Publication date: July 11, 2019
    Applicant: NIPPON SHOKUBAI CO., LTD.
    Inventors: Yohei IMAIZUMI, Keiko IZUMI, Kazunari YASUMURA, Daisuke MATSUI
  • VISCOSITY INDEX IMPROVER, METHOD FOR PRODUCING THE SAME AND LUBRICATING OIL COMPOSITION
    Publication number: 20170233675
    Abstract: A viscosity index improver comprising a polymer which has a high viscosity index and good shear stability and which exhibits sufficient solubility in a lubricating base oil, a process for producing the same, and a lubricating oil composition containing the viscosity index improver are provided, wherein the viscosity index improver comprising a polymer satisfying the following (1) to (4): (1) weight-average molecular weight (Mw) of 200,000 or more and 600,000 or less; (2) number-average molecular weight (Mn) of 90,000 or more; (3) molecular weight distribution (Mw/Mn) of 4.0 or less; and (4) branching degree of 1.0 or more.
    Type: Application
    Filed: September 15, 2015
    Publication date: August 17, 2017
    Applicant: NIPPON SHOKUBAI CO., LTD.
    Inventors: Tadayoshi UGAMURA, Kazunari YASUMURA, Keiko IZUMI
  • Composition for electrode of nonaqueous electrolyte secondary battery, electrode for nonaqueous electrolyte secondary battery using the same and nonaqueous electrolyte secondary battery
    Patent number: 8603674
    Abstract: A composition for an electrode of a nonaqueous electrolyte secondary battery contains an active material and a binder resin. The composition contains a vinylpyrrolidone-based polymer as the binder resin. The hydroxyl group equivalent of the vinylpyrrolidone-based polymer is within the range of 250 to 2500.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: December 10, 2013
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Tadayoshi Tanaka, Hiroshi Minami, Naoki Imachi, Kazunari Yasumura, Kunihiro Iwai, Daisuke Imai
  • COMPOSITION FOR ELECTRODE OF NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    Publication number: 20110159363
    Abstract: A composition for an electrode of a nonaqueous electrolyte secondary battery contains an active material and a binder resin. The composition contains a vinylpyrrolidone-based polymer as the binder resin. The hydroxyl group equivalent of the vinylpyrrolidone-based polymer is within the range of 250 to 2500.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 30, 2011
    Applicants: SANYO ELECTRIC CO., LTD., NIPPON SHOKUBAI CO., LTD.
    Inventors: Tadayoshi Tanaka, Hiroshi Minami, Naoki Imachi, Kazunari Yasumura, Kunihiro Iwai, Daisuke Imai