Patents by Inventor Noriko Kai

Noriko Kai 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).

  • Lubricating oil compositions and lubricating oil viscosity modifiers
    Patent number: 11655428
    Abstract: A lubricating oil composition includes an ethylene/?-olefin copolymer (A) having 70 to 90 mole % of structural units derived from ethylene and an intrinsic viscosity [?] of 0.3 to 1.0 dl/g.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: May 23, 2023
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Akio Hayakawa, Akihiro Udagawa, Noriko Kai, Yuji Tokunaga
  • LUBRICATING OIL COMPOSITIONS AND LUBRICATING OIL VISCOSITY MODIFIERS
    Publication number: 20210130725
    Abstract: A lubricating oil composition includes an ethylene/?-olefin copolymer (A) having 70 to 90 mole % of structural units derived from ethylene and an intrinsic viscosity [?] of 0.3 to 1.0 dl/g.
    Type: Application
    Filed: April 16, 2019
    Publication date: May 6, 2021
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Akio HAYAKAWA, Akihiro UDAGAWA, Noriko KAI, Yuji TOKUNAGA
  • Production method of olefin (co)polymer containing constituent unit derived from 1-butene
    Patent number: 9944728
    Abstract: The purpose of the present invention is to provide a method for efficiently producing an olefin (co)polymer containing a constituent unit derived from 1-butene, the (co)polymer having a molecular weight that is sufficiently high even for high temperature conditions that are beneficial for industrial production methods.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: April 17, 2018
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Ikuko Ebisawa, Masahiro Yamashita, Takashi Yukita, Junichi Mohri, Junpei Tanaka, Noriko Kai
  • PRODUCTION METHOD OF OLEFIN (CO)POLYMER CONTAINING CONSTITUENT UNIT DERIVED FROM 1-BUTENE
    Publication number: 20170275396
    Abstract: The purpose of the present invention is to provide a method for efficiently producing an olefin (co)polymer containing a constituent unit derived from 1-butene, the (co)polymer having a molecular weight that is sufficiently high even for high temperature conditions that are beneficial for industrial production methods.
    Type: Application
    Filed: September 10, 2015
    Publication date: September 28, 2017
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Ikuko EBISAWA, Masahiro YAMASHITA, Takashi YUKITA, Junichi MOHRI, Junpei TANAKA, Noriko KAI
  • Electrophotographic toner
    Patent number: 9323166
    Abstract: The present invention addresses the problem of providing an electrophotographic toner which has excellent storage property, is excellent in offset resistance and low-temperature fixing property during printing and has few substances causing staining with time, odor or dust inside a copy machine or a printer. The present invention relates to an electrophotographic toner characterized by containing an ethylene copolymer which comprises a constituent unit (a) derived from ethylene in an amount of 80 to 99.5% by mol and a constituent unit (b) derived from a cyclic olefin of 8 or more carbon atoms in an amount of 0.5 to 20% by mol [(a)+(b)=100% by mol] and satisfies the requirements: (i) the intrinsic viscosity [?] is in the range of 0.01 to 0.50 dl/g, and (ii) the crystallinity is in the range of 50 to 90%.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: April 26, 2016
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Kuniaki Kawabe, Masakazu Tanaka, Hiroshi Matsuoka, Noriko Kai, Keiichi Taki
  • ELECTROPHOTOGRAPHIC TONER
    Publication number: 20150044603
    Abstract: The present invention addresses the problem of providing an electrophotographic toner which has excellent storage property, is excellent in offset resistance and low-temperature fixing property during printing and has few substances causing staining with time, odor or dust inside a copy machine or a printer. The present invention relates to an electrophotographic toner characterized by containing an ethylene copolymer which comprises a constituent unit (a) derived from ethylene in an amount of 80 to 99.5% by mol and a constituent unit (b) derived from a cyclic olefin of 8 or more carbon atoms in an amount of 0.5 to 20% by mol [(a)+(b)=100% by mol] and satisfies the requirements: (i) the intrinsic viscosity [?] is in the range of 0.01 to 0.50 dl/g, and (ii) the crystallinity is in the range of 50 to 90%.
    Type: Application
    Filed: March 22, 2013
    Publication date: February 12, 2015
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Kuniaki Kawabe, Masakazu Tanaka, Hiroshi Matsuoka, Noriko Kai, Keiichi Taki