Patents by Inventor Hitoshi Komatsubara

Hitoshi Komatsubara 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: 20200407660
    Abstract: A lubricating oil composition for a push-belt continuously variable transmission includes: (A) a lubricant base oil including at least one wax-isomerized base oil, and having a specific kinematic viscosity and a specific viscosity index; (B) a poly(meth)acrylate having a specific weight average molecular weight; (C) a boron-containing succinimide compound; (D) a borate ester compound; and (E) an overbased calcium detergent, wherein the composition has a kinematic viscosity at 40° C. of no more than 25 mm2/s; a viscosity index of no less than 180; and the ratio of a boron content to a calcium content of 0.5 to 1.5.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Applicants: ENEOS Corporation, HONDA MOTOR Co., Ltd.
    Inventors: Hitoshi KOMATSUBARA, Shingo MATSUKI, Toshitaka NAKAMURA, Hiroyuki CHINEN, Yuji MATSUI, Kosei KASHIMA, Yosuke WATANABE, Makito NAKASONE
  • Publication number: 20200032159
    Abstract: Disclosed is a lubricating oil composition comprising: a lubricating base oil comprising 0.5% to 70% by mass of an ester base oil based on the total amount of the lubricating base oil, and having a kinematic viscosity at 40° C. of 18 to 28 mm2/s; and an organic molybdenum compound in an amount of 100 to 1000 mass ppm in terms of the molybdenum element based on the total amount of the lubricating oil composition, wherein the lubricating oil composition has a kinematic viscosity at 40° C. of 50 mm2/s or less.
    Type: Application
    Filed: October 2, 2019
    Publication date: January 30, 2020
    Applicant: JXTG Nippon Oil & Energy Corporation
    Inventors: Hitoshi KOMATSUBARA, Noriko AYAME, Mona ARIYAMA
  • Publication number: 20200032160
    Abstract: A lubricating oil composition including: a lubricating base oil; (A) a dispersant poly(meth)acrylate compound having a weight average molecular weight of 30,000 to 200,000 in an amount of 1 to 10 mass % on the basis of the total mass of the composition; and (B) a non-dispersant poly(meth)acrylate compound having a weight average molecular weight of 15,000 to 100,000 in an amount of no more than 15 mass % on the basis of the total mass of the composition, wherein the ratio MA/MB of the amount MA of the component (A) to the amount MB of the component (B) is 0.05 to 1; and the ratio MwB/MwA of the weight average molecular weight MwB of the component (B) to the weight average molecular weight MwA of the component (A) is 0.05 to 2.
    Type: Application
    Filed: April 13, 2018
    Publication date: January 30, 2020
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Hitoshi KOMATSUBARA, Shingo MATSUKI, Toshitaka NAKAMURA, Hiroyuki CHINEN, Yuji MATSUI
  • Patent number: 10443016
    Abstract: Disclosed is a lubricating oil composition for gear oil, comprising a lubricating base oil having a kinematic viscosity at 40° C. of 140 to 350 mm2/s, a copolymer of an ?-olefin and an ester monomer having a polymerizable unsaturated bond, a performance additive containing phosphorus and sulfur, and a poly(meth)acrylate pour-point depressant.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: October 15, 2019
    Assignee: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventor: Hitoshi Komatsubara
  • Patent number: 10227541
    Abstract: A lubricating oil composition for transmissions is provided which improves fuel saving properties and has excellent metal fatigue life and heat resistance. The composition contains 50 to 97 percent by mass of (A) a mineral base oil having a 100° C. kinematic viscosity of 1.5 mm2/s or higher and 3.5 mm2/s or lower, a pour point a ?25° C. or lower, a viscosity index of 105 or greater, a % CP of 85 or greater, a % CN of 2 or greater and 20 or less and a % CA of 3 or less; 3 to 10 percent by mass of (B) a monoester-based base oil having a 100° C. kinematic viscosity of 2 mm2/s or higher and 10 mm2/s or lower; and 150 to 400 ppm by mass as phosphorus of (C) a specific sulfur-containing phosphite ester. The composition has a 100° C. kinematic viscosity of 2.5 mm2/s or higher and 4.0 mm2/s or lower.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: March 12, 2019
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Kohei Masuda, Hitoshi Komatsubara, Hajime Nakao
  • Publication number: 20180312776
    Abstract: The present invention provides a lubricating oil composition comprising: a lubricating base oil; 1.0% by mass or more and 15.0% by mass or less of a dispersant poly(meth)acrylate compound having the weight average molecular weight of 20000 or more and 200000 or less; 0.05% by mass or more and 6.0% by mass or less of a thiadiazole compound; 1.5% by mass or more and 4.0% by mass or less of a polysulfide compound; and 0.2% by mass or more and 1.5% by mass or less of a friction modifier, based on the total amount of the lubricating oil composition, wherein the mass ratio of the polysulfide compound content to the thiadiazole compound content (polysulfide compound/thiadiazole compound) is 0.4 or more and 50 or less, and the kinematic viscosity at 100° C. of the lubricating oil composition is 7.0 mm2/s or more and 35.0 mm2/s or less.
    Type: Application
    Filed: October 28, 2016
    Publication date: November 1, 2018
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Mona ARIYAMA, Hitoshi KOMATSUBARA, Takama YASUDA
  • Publication number: 20180112150
    Abstract: Disclosed is a lubricating oil composition for gear oil, comprising a lubricating base oil having a kinematic viscosity at 40° C. of 140 to 350 mm2/s, a copolymer of an ?-olefin and an ester monomer having a polymerizable unsaturated bond, a performance additive containing phosphorus and sulfur, and a poly(meth)acrylate pour-point depressant.
    Type: Application
    Filed: February 25, 2016
    Publication date: April 26, 2018
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventor: Hitoshi KOMATSUBARA
  • Publication number: 20180087002
    Abstract: A lubricating oil composition for a continuously variable transmission including: (A) a lubricant base oil; (B) a borate ester compound in an amount of 25 to 500 mass ppm in terms of boron on the basis of the total mass of the composition; (C) phosphoric acid in an amount of 100 to 750 mass ppm in terms of phosphorus on the basis of the total mass of the composition; (D) a poly(meth)acrylate having a weight average molecular weight of no more than 100,000, wherein the lubricating oil composition has a kinematic viscosity at 40° C. of no more than 25 mm2/s.
    Type: Application
    Filed: September 18, 2017
    Publication date: March 29, 2018
    Applicant: JXTG NIPPON OIL & ENERGY CORPORATION
    Inventors: Hitoshi KOMATSUBARA, Shingo MATSUKI, Toshitaka NAKAMURA, Hiroyuki CHINEN, Yuji MATSUI
  • Publication number: 20170145337
    Abstract: A lubricating oil composition for transmissions is provided which improves fuel saving properties and has excellent metal fatigue life and heat resistance. The composition contains 50 to 97 percent by mass of (A) a mineral base oil having a 100° C. kinematic viscosity of 1.5 mm2/s or higher and 3.5 mm2/s or lower, a pour point a ?25° C. or lower, a viscosity index of 105 or greater, a % Cp of 85 or greater, a % CN of 2 or greater and 20 or less and a % CA of 3 or less; 3 to 10 percent by mass of (B) a monoester-hased base oil having a 100° C. kinematic viscosity of 2 mm2/s or higher and 10 mm2/s or lower; and 150 to 400 ppm by mass as phosphorus of (C) a specific sulfur-containing phosphite ester. The composition has a 100° C. kinematic viscosity of 2.5 mm2/s or higher and 4.0 mm2/s or lower.
    Type: Application
    Filed: April 7, 2015
    Publication date: May 25, 2017
    Inventors: Kohei MASUDA, Hitoshi KOMATSUBARA, Hajime NAKAO
  • Patent number: 9567546
    Abstract: The present invention provides a lubricating oil composition having fuel saving properties and providing gears and bearings with satisfactory durability, which is thus suitably used particularly for a gear system of an automobile. The lubricating oil composition a lubricating base oil comprising a mix base oil of (A) a mineral base oil having a 40° C. kinematic viscosity of 10 mm2/s or higher and 100 mm2/s or lower and (E) a mineral base oil having a 40° C. kinematic viscosity of 200 mm2/s or higher and 600 mm2/s or lower and a sulfur content of 0.3 to 0.9 percent by mass, the content of the base oil belonging to Component (B) is 15 percent by mass or more, and (C) and an organic molybdenum compound in an amount of 100 to 1000 ppm by mass as molybdenum, the lubricating oil composition having a 40° C. kinematic viscosity of 90 mm2/s or lower.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: February 14, 2017
    Assignee: JX Nippon Oil & Energy Corporation
    Inventor: Hitoshi Komatsubara
  • Patent number: 9540587
    Abstract: A lubricating oil composition for transmissions having improved fuel saving properties, excellent metal fatigue prevention properties, and heat resistance containing: a lubricating base oil containing (A) a mineral base oil having a 100° C. kinematic viscosity of 1.5 mm2/s or higher and 3.5 mm2/s or lower, a pour point of ?25° C. or lower, a viscosity index of 105 or greater, a % CP of 85 or greater, a % CN of 2 or greater and 20 or less and a % CA of 3 or less and (B) a monoester-based base oil having a 100° C. kinematic viscosity of 2 to 10 mm2/s; (C) a phosphorus acid ester; and (D) a boronated ashless dispersant, the ratio of the mass percent of boron to the mass percent of phosphorus in the composition (B/P) being from 0.07 to 0.42, and the composition having a 100° C. kinematic viscosity of 2.5 to 4.0 mm2/s is described.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: January 10, 2017
    Assignees: JX Nippon Oil & Enery Corporation, AISIN AW CO., LTD.
    Inventors: Hajime Nakao, Hitoshi Komatsubara, Kazunori Ishikawa, Katsuhito Yamada
  • Publication number: 20160257905
    Abstract: Disclosed is a lubricating oil composition comprising: a lubricating base oil comprising 0.5% to 70% by mass of an ester base oil based on the total amount of the lubricating base oil, and having a kinematic viscosity at 40° C. of 18 to 28 mm2/s; and an organic molybdenum compound in an amount of 100 to 1000 mass ppm in terms of the molybdenum element based on the total amount of the lubricating oil composition, wherein the lubricating oil composition has a kinematic viscosity at 40° C. of 50 mm2/s or less.
    Type: Application
    Filed: October 17, 2014
    Publication date: September 8, 2016
    Applicant: JX Nippon Oil & Energy Corporation
    Inventors: Hitoshi Komatsubara, Noriko Ayame, Mona Ariyama
  • Patent number: 9382499
    Abstract: The present invention provides a lubricating oil composition than can keep the metal-to-metal friction coefficient high and is excellent in anti-seizure properties. The lubricating oil composition comprises a base oil and on the basis of the total mass of the composition (A) 0.05 percent by mass or more of a polysulfide, (B) 0.05 percent by mass or more of thiadiazole and (C) 0.1 percent by mass or more of a phosphorus-containing additive, and containing sulfur in an amount of 0.2 percent by mass or more on the basis of sulfur and phosphorus in an amount of 0.2 percent by mass or less on the basis of phosphorus, the ratio of the sulfur basis percent by mass/the phosphorus basis percent by mass (S/P) being from 3.0 to 5.0.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: July 5, 2016
    Assignee: JX Nippon Oil & Energy Corporation
    Inventor: Hitoshi Komatsubara
  • Patent number: 9376646
    Abstract: A lubricating oil composition is provided having excellent torque capacity, shifting properties, and anti-wear properties for wet friction materials, which can maintain initial torque capacity and shifting properties for a long period of time, suitable for automatic and/or continuously variable transmissions. The lubricating oil composition contains a lubricating base oil and based on the total mass of the composition (A) 0.5 percent by mass or more of a fatty acid amide compound represented by formula (1); (B) 0.05 percent by mass or more of thiadiazole; and (C) 0.1 percent by mass of a phosphorus-containing additive, and contains sulfur in an amount of 0.2 percent by mass or more based on sulfur and phosphorus in an amount of 0.2 percent by mass or less based on phosphorus, the ratio of the sulfur basis percent by mass/the phosphorus basis percent by mass (S/P) being from 3.0 to 5.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: June 28, 2016
    Assignee: JX Nippon Oil & Energy Corporation
    Inventor: Hitoshi Komatsubara
  • Patent number: 9340747
    Abstract: The present invention provides a lubricating oil composition for transmissions which is improved in fuel saving properties and has excellent metal fatigue prevention properties and heat resistance. The lubricating oil composition comprises (A) a mineral base oil having a 100° C. kinematic viscosity of 1.5 mm2/s or higher and 3.5 mm2/s or lower, a pour point of ?25° C. or lower, a viscosity index of 110 or greater, a % CN of 2 or greater and 20 or less and a % CA of 3 or less, the lubricating oil composition having a 100° C. kinematic viscosity of 2.5 mm2/s or higher and 3.8 mm2/s or lower.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: May 17, 2016
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Hajime Nakao, Hitoshi Komatsubara
  • Publication number: 20160075964
    Abstract: A lubricating oil composition provides enhanced anti-wear and anti-seizure properties, even though reduced in viscosity, suitable for use as an automatic transmission oil, particularly as a metal belt continuously variable transmission oil. The lubricating oil composition contains a base oil and the following based on the total mass of the composition: (A) a boron-containing ashless dispersant in an amount of 300 to 1000 ppm by mass on a boron basis, (B) a metallic detergent having a total base number of at least 200 mgKOH/g in an amount of 100 to 1200 ppm by mass on a metal basis, and (C) a friction modifier in an amount of 0.01 to 5 percent by mass. The ratio (Bo/M) of the content of Component (A) on a boron basis (Bo:ppm by mass) to the content of Component (B) on a metal basis (M:ppm by mass) being from 0.5 to 4.
    Type: Application
    Filed: February 4, 2014
    Publication date: March 17, 2016
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventor: Hitoshi KOMATSUBARA
  • Patent number: 9253370
    Abstract: [Problem] To provide a technique for calculating the psychophysical value of a color corresponding to an arbitrarily defined tone by modeling a tone concept defined in the PCCS (Practical Color Co-ordinate System).
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: February 2, 2016
    Assignees: JAPAN COLOR RESEARCH INSTITUTE, NAKAGAWA CHEMICAL, INC.
    Inventors: Hitoshi Komatsubara, Shinji Kobayashi, Koichi Nakagawa
  • Publication number: 20150376544
    Abstract: A lubricating oil composition for transmissions having improved fuel saving properties, excellent metal fatigue prevention properties, and heat resistance containing: a lubricating base oil containing (A) a mineral base oil having a 100° C. kinematic viscosity of 1.5 mm2/s or higher and 3.5 mm2/s or lower, a pour point of ?25° C. or lower, a viscosity index of 105 or greater, a % Cp of 85 or greater, a % CN of 2 or greater and 20 or less and a % CA of 3 or less and (B) a monoester-based base oil having a 100° C. kinematic viscosity of 2 to 10 mm2/s; (C) a phosphorus acid ester; and (D) a boronated ashless dispersant, the ratio of the mass percent of boron to the mass percent of phosphorus in the composition (B/P) being from 0.07 to 0.42, and the composition having a 100° C. kinematic viscosity of 2.5 to 4.0 mm2/s is described.
    Type: Application
    Filed: November 19, 2013
    Publication date: December 31, 2015
    Applicants: JX Nippon Oil & Energy Corporation, AISIN AW CO., LTD.
    Inventors: Hajime NAKAO, Hitoshi KOMATSUBARA, Kazunori ISHIKAWA, Katsuhito YAMADA
  • Publication number: 20150353859
    Abstract: The present invention provides a lubricating oil composition having fuel saving properties and providing gears and bearings with satisfactory durability, which is thus suitably used particularly for a gear system of an automobile. The lubricating oil composition a lubricating base oil comprising a mix base oil of (A) a mineral base oil having a 40° C. kinematic viscosity of 10 mm2/s or higher and 100 mm2/s or lower and (E) a mineral base oil having a 40° C. kinematic viscosity of 200 mm2/s or higher and 600 mm2/s or lower and a sulfur content of 0.3 to 0.9 percent by mass, the content of the base oil belonging to Component (B) is 15 percent by mass or more, and (C) and an organic molybdenum compound in an amount of 100 to 1000 ppm by mass as molybdenum, the lubricating oil composition having a 40° C. kinematic viscosity of 90 mm2/s or lower.
    Type: Application
    Filed: August 27, 2013
    Publication date: December 10, 2015
    Applicant: JX Nippon Oil & Energy Corporation
    Inventor: Hitoshi KOMATSUBARA
  • Patent number: 9120992
    Abstract: A gear oil composition is provided having fuel saving performance and providing gears or bearings with sufficient durability. The composition includes a base oil having a blend of (A) a mineral lubricating base oil having a 100° C. kinematic viscosity of 2 to 6 mm2/s, a % CA of 0.5 or less and a tertiary carbon content of 7% or more and (B) a solvent-refined mineral lubricating oil having a 100° C. kinematic viscosity of 10 to 70 mm2/s in an amount of 2 to 40 percent by mass based on the total base oil composition mass; (D) zinc dialkyldithiophosphate in an amount of 0.02 to 0.5 percent by mass based on the zinc amount; and (E) an alkaline earth metal detergent having a base number of 100 mgKOH/g or greater in an amount of 0.1 to 0.5 percent by mass, based on the metal amount, of the gear oil composition mass.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: September 1, 2015
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Hajime Nakao, Hitoshi Komatsubara