Patents by Inventor Haruko Nagai

Haruko Nagai 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 composition for transmission
    Patent number: 11560527
    Abstract: A lubricating oil composition for a transmission, the composition including: (A) a lubricant base oil comprising a mineral base oil and/or a synthetic base oil; and (B) a poly(meth)acrylate having a weight average molecular weight of no more than 25,000, wherein the composition has a kinematic viscosity at 100° C. of 2.5 to 4.9 mm2/s.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: January 24, 2023
    Assignee: ENEOS CORPORATION
    Inventors: Kohei Masuda, Haruko Nagai, Masaaki Itou, Mayuko Sumiya
  • LUBRICATING OIL COMPOSITION FOR TRANSMISSION
    Publication number: 20220127543
    Abstract: A lubricating oil composition for a transmission, the composition including: (A) a lubricant base oil comprising a mineral base oil and/or a synthetic base oil; and (B) a poly(meth)acrylate having a weight average molecular weight of no more than 25,000, wherein the composition has a kinematic viscosity at 100° C. of 2.5 to 4.9 mm2/s.
    Type: Application
    Filed: February 20, 2020
    Publication date: April 28, 2022
    Applicant: ENEOS Corporation
    Inventors: Kohei MASUDA, Haruko NAGAI, Masaaki ITOU, Mayuko SUMIYA
  • Cylindrical product
    Patent number: 6670005
    Abstract: The disclosed method can manufacture a thick-walled cylindrical part of an excellent quality which is free from the interlayer separation, by using a fiber reinforced plastic composite material. The fiber reinforced plastic composite material having a small thermal expansion coefficient is laminated in the circumferential direction of a mandrel; the laminated fiber reinforced plastic composite material layer is heat-cured to form an auxiliary member of the mandrel; a plurality of sorts of fiber reinforced plastic composite materials having a different elastic modulus, respectively are laminated on the formed auxiliary member; and the laminated fiber reinforced plastic composite materials are all heat-cured.
    Type: Grant
    Filed: September 23, 1998
    Date of Patent: December 30, 2003
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Minoru Kimura, Haruko Nagai, Yumi Ito, Naoya Takizawa, Takashi Nagumo
  • Method of manufacturing a cylindrical part by fiber reinforced plastic composite material
    Patent number: 6299718
    Abstract: The disclosed method can manufacture a thick-walled cylindrical part of an excellent quality which is free from the interlayer separation, by using a fiber reinforced plastic composite material. The fiber reinforced plastic composite material having a small thermal expansion coefficient is laminated in the circumferential direction of a mandrel; the laminated fiber reinforced plastic composite material layer is heat-cured to form an auxiliary member of the mandrel; a plurality of sorts of fiber reinforced plastic composite materials having a different elastic modulus, respectively are laminated on the formed auxiliary member; and the laminated fiber reinforced plastic composite materials are all heat-cured.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: October 9, 2001
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Minoru Kimura, Haruko Nagai, Yumi Ito, Naoya Takizawa, Takashi Nagumo
  • CYLINDRICAL PART MANUFACTURED BY FIBER REINFORCED PLASTIC COMPOSITE MATERIAL AND THE METHOD THEREOF
    Publication number: 20010008163
    Abstract: The disclosed method can manufacture a thick-walled cylindrical part of an excellent quality which is free from the interlayer separation, by using a fiber reinforced plastic composite material.
    Type: Application
    Filed: September 23, 1998
    Publication date: July 19, 2001
    Inventors: MINORU KIMURA, HARUKO NAGAI, YUMI ITO, NAOYA TAKIZAWA, TAKASHI NAGUMO
  • Method of manufacturing a cylindrical part by fiber reinforced plastic composite material
    Patent number: 5985073
    Abstract: The disclosed method can manufacture a thick-walled cylindrical part of an excellent quality which is free from the interlayer separation, by using a fiber reinforced plastic composite material. The fiber reinforced plastic composite material having a small thermal expansion coefficient is laminated in the circumferential direction of a mandrel; the laminated fiber reinforced plastic composite material layer is heat-cured to form an auxiliary member of the mandrel; a plurality of sorts of fiber reinforced plastic composite materials having a different elastic modulus, respectively are laminated on the formed auxiliary member; and the laminated fiber reinforced plastic composite materials are all heat-cured.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: November 16, 1999
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Minoru Kimura, Haruko Nagai, Yumi Ito, Naoya Takizawa, Takashi Nagumo