Patents by Inventor Akira Yaguchi
Akira Yaguchi 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: 9637703Abstract: The lubricating oil composition of the invention comprises a lubricating base oil with a 100° C. kinematic viscosity of 1-20 mm2/s, (A) a friction modifier, (B) a first overbased metal salt obtained by overbasing an oil-soluble metal salt with an alkaline earth metal borate, and (C) an overbased second oil-soluble metal salt obtained by overbasing an oil-soluble metal salt with an alkaline earth metal carbonate.Type: GrantFiled: September 27, 2010Date of Patent: May 2, 2017Assignee: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Akira Yaguchi, Akio Mutou, Mari Nagae
-
Patent number: 9447359Abstract: The invention provides a lubricating oil composition comprising: a lubricating base oil having a kinematic viscosity at 100° C. of 1-10 mm2/s, a % Cp of 70 or greater and a % CA of not greater than 2; a first viscosity index improver of 0.01-10% by mass, based on the total weight of the composition, wherein the first viscosity index improver is a poly(meth)acrylate having a weight-average molecular weight of not greater than 100,000; and a second viscosity index improver of 0.01-50% by mass, based on the total weight of the composition, wherein the second viscosity index improver is a polymer having a weight-average molecular weight of 100,000 or greater and containing a structural unit represented by the following formula (1) in a proportion of 0.5-70 mol %, the composition having a kinematic viscosity at 100° C. of 4-12 mm2/s and a viscosity index of 140-300.Type: GrantFiled: January 9, 2009Date of Patent: September 20, 2016Assignee: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Akira Yaguchi
-
Patent number: 9404062Abstract: The invention provides a lubricating oil composition comprising a lubricating base oil with a kinematic viscosity at 100° C. of 1-10 mm2/s, a % Cp; of 70 or greater and a % CA of no greater than 2 and a viscosity index improver having a weight-average molecular weight of 100,000 or greater and a ratio of weight-average molecular weight to PSSI of 1.0×104 or greater, at 0.1-50% by mass based on the total amount of the composition, and having a kinematic viscosity at 100° C. of 9.0-12.5 mm2/s and a HTHS viscosity at 150° C. of 2.8 mPa·s or greater. It further provides a lubricating oil composition comprising a lubricating base oil with a kinematic viscosity at 100° C. of 1-6 mm2/s, a % Cp of 70 or greater and a % CA of no greater than 2, a hydrocarbon-based viscosity index improver with a PSSI of no greater than 20, and a poly(meth)acrylate-based viscosity index improver.Type: GrantFiled: May 11, 2010Date of Patent: August 2, 2016Assignee: JX NIPPON OIL & ENERGY CORPORATIONInventors: Akira Yaguchi, Shigeki Matsui, Teppei Tsujimoto
-
Patent number: 9376645Abstract: The present invention provides a lubricating oil composition for internal combustion engines which can reduce sufficiently the friction under mixed lubricating conditions and is excellent in fuel saving properties. The lubricating oil composition comprises (A) a base oil having a 100° C. kinematic viscosity of 2 to 8 mm2/s and an aromatic content of 10 percent by mass or less, (B) a metallic detergent having a metal ratio of 1.01 to 3.3 overbased with an alkaline earth metal borate, and (C) an organic molybdenum compound with a molybdenum concentration of 0.01 to 0.2 percent by mass on the basis of the total mass of the composition, and having a 100° C. HTHS viscosity of 5.5 mPa·s or lower.Type: GrantFiled: November 13, 2012Date of Patent: June 28, 2016Assignee: JX Nippon Oil & Energy CorporationInventors: Akira Yaguchi, Kazuhiro Yagishita, Koji Hoshino, Shigeki Matsui
-
Patent number: 9353329Abstract: The present invention provides a lubricating oil composition for an internal combustion engine used mainly to drive a generator and to improve the fuel economy thereof. The composition comprises (A) a base oil being a hydrocarbon base oil having a ratio (CA/CB) of the proportion of the component of 24 or fewer carbon atoms (CA) and the proportion of the component of 25 or more carbon atoms (CB) in the carbon number distribution obtained by gas chromatography distillation of 2.0 or higher, the composition having a ratio (Vs/Vk) of the 80° C. high-temperature high-shear (HTHS) viscosity (Vk) and the 150° C. HTHS viscosity (Vs) of 0.4 or higher and a 100° C. kinematic viscosity of 5.2 mm2/s or higher and 8 mm2/s or lower.Type: GrantFiled: January 20, 2012Date of Patent: May 31, 2016Assignee: JX Nippon Oil & Energy CorporationInventors: Hiroya Miyamoto, Akira Yaguchi
-
Patent number: 9029303Abstract: A lubricant oil composition according to the present invention comprises: a lubricant base oil whose kinematic viscosity at 100° C. is 1 to 20 mm2/s; and a viscosity index improver in which a ratio M1a/M2a of a total area M1a of peaks in a chemical shift between 29-31 ppm to a total area M2a of peaks in a chemical shift between 64-69 ppm based on a total area of all the peaks is not less than 10 in a spectrum obtained by 13C-NMR.Type: GrantFiled: May 31, 2010Date of Patent: May 12, 2015Assignee: JX Nippon Oil & Energy CorporationInventors: Shigeki Matsui, Akira Yaguchi, Reiko Kudo
-
Patent number: 8999904Abstract: The lubricating oil composition of the invention comprises a lubricating base oil with a kinematic viscosity at 100° C. of 1-20 mm2/s, and a viscosity index improver having a ratio M1/M2 of 0.20 or greater, between the total area of the peaks between chemical shifts of 36-38 ppm M1 and the total area of the peaks between chemical shifts of 64-66 ppm M2, with respect to the total area of all of the peaks, in the spectrum obtained by 13C-NMR. The lubricating oil composition of the invention has excellent effects, with a sufficiently high HTHS viscosity at 150° C., and a sufficiently low kinematic viscosity at 40° C., a sufficiently low kinematic viscosity at 100° C. and a sufficiently low HTHS viscosity at 100° C.Type: GrantFiled: January 25, 2010Date of Patent: April 7, 2015Assignee: JX Nippon Oil & Energy CorporationInventors: Shigeki Matsui, Akira Yaguchi, Reiko Kudo, Hiroya Miyamoto, Teppei Tsujimoto
-
Publication number: 20150005208Abstract: The present invention provides a lubricating oil composition for internal combustion engines which can reduce sufficiently the friction under mixed lubricating conditions and is excellent in fuel saving properties. The lubricating oil composition comprises (A) a base oil having a 100° C. kinematic viscosity of 2 to 8 mm2/s and an aromatic content of 10 percent by mass or less, (B) a metallic detergent having a metal ratio of 1.01 to 3.3 overbased with an alkaline earth metal borate, and (C) an organic molybdenum compound with a molybdenum concentration of 0.01 to 0.2 percent by mass on the basis of the total mass of the composition, and having a 100° C. HTHS viscosity of 5.5 mPa·s or lower.Type: ApplicationFiled: November 13, 2012Publication date: January 1, 2015Inventors: Akira Yaguchi, Kazuhiro Yagishita, Koji Hoshino, Shigeki Matsui
-
Publication number: 20140378355Abstract: The present invention provides a lubricating oil composition that is a lubricating oil composition with a 150° C. HTHS viscosity of less than 2.6 mPa·s and can be reduced sufficiently in the 40° C. kinematic viscosity, 100° C. kinematic viscosity and 100° C. HTHS viscosity and suppress the increase of the friction coefficient in a boundary lubrication region and has excellent fuel saving properties. The lubricating oil composition comprises a lubricating base oil with a 100° C. kinematic viscosity of 1 to 5 mm2/s; (A) a viscosity index improver with a weight average molecular weight of 400,000 or less and a PSSI of 20 or less; (B) an overbasic metallic detergent with a metal ratio of 3.4 or less; and (C) a friction modifier, and having a 150° C. HTHS viscosity of lower than 2.6 mPa·s.Type: ApplicationFiled: November 9, 2012Publication date: December 25, 2014Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Akira Yaguchi
-
Patent number: 8796194Abstract: The lubricating oil composition of the invention includes a lubricating base oil with a kinematic viscosity at 100° C. of 1-6 mm2/s, a % Cp of 70 or greater and a % CA of no greater than 2, and a viscosity index improver which, when added to the lubricating base oil, results in an A/B ratio of less than 3.2 and a C/B ratio of less than 1.5. A is the thickening effect on the kinematic viscosity at 100° C., B is the thickening effect on the HTHS viscosity at 150° C., and C is the thickening effect on the HTHS viscosity at 100° C.Type: GrantFiled: August 30, 2010Date of Patent: August 5, 2014Assignee: JX Nippon Oil & Energy CorporationInventors: Akio Mutou, Akira Yaguchi, Shigeki Matsui
-
Patent number: 8785359Abstract: A lubricant oil composition comprising: a lubricant base oil whose kinematic viscosity at 100° C. is 1 to 6 mm2/s, % Cp is not less than 70, and % CA is not more than 2; a first viscosity index improver in which the ratio A/B of a viscosity increasing effect A in the equation (1) to a viscosity increasing effect B in the equation (2) when added to the lubricant base oil is a value of not less than 4.5, and a PSSI is not more than 30; and a second viscosity index improver in which the ratio A/B when added to the lubricant base oil is a value less than 4.5: A=X?X0??(1) B=Y?Y0??(2) wherein A represents a viscosity increasing effect of the kinematic viscosity at 100° C., B represents a viscosity increasing effect of the HTHS viscosity at 150° C., X represents a kinematic viscosity at 100° C. of a mixture of the lubricant base oil with 3% by mass of the first or second viscosity index improver, X0 represents a kinematic viscosity at 100° C. of the lubricant base oil, Y represents an HTHS viscosity at 150° C.Type: GrantFiled: January 25, 2010Date of Patent: July 22, 2014Assignee: JX Nippon Oil & Energy CorporationInventors: Akira Yaguchi, Shigeki Matsui, Teppei Tsujimoto
-
Publication number: 20140135243Abstract: A viscosity index improver of the present invention contains a star polymer obtained by a reaction of divinylbenzene with alkyl methacrylate containing stearyl methacrylate, the star polymer having a core part and an arm part, wherein the core part is derived from the divinylbenzene and the arm part is a polymer chain of the alkyl methacrylate. A lubricant oil additive and a lubricant oil composition of the present invention contain the above viscosity index improver.Type: ApplicationFiled: March 23, 2012Publication date: May 15, 2014Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Akira Takagi, Akira Yaguchi, Kazuo Tagawa, Shinichi Shirahama
-
Publication number: 20140080742Abstract: The present invention provides a lubricating oil composition for an internal combustion engine used mainly to drive a generator and to improve the fuel economy thereof. The composition comprises (A) a base oil being a hydrocarbon base oil having a ratio (CA/CB) of the proportion of the component of 24 or fewer carbon atoms (CA) and the proportion of the component of 25 or more carbon atoms (CB) in the carbon number distribution obtained by gas chromatography distillation of 2.0 or higher, the composition having a ratio (Vs/Vk) of the 80° C. high-temperature high-shear (HTHS) viscosity (Vk) and the 150° C. HTHS viscosity (Vs) of 0.4 or higher and a 100° C. kinematic viscosity of 5.2 mm2/s or higher and 8 mm2/s or lower.Type: ApplicationFiled: January 20, 2012Publication date: March 20, 2014Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Hiroya Miyamoto, Akira Yaguchi
-
Patent number: 8642517Abstract: The present invention provides a lubricating oil composition comprising: a lubricating base oil including a lubricating base oil component having a urea adduct value of 4% by mass or less, a kinematic viscosity of 25 mm2/s or less at 40° C. and a viscosity index of 120 or greater, wherein the amount of the lubricating base oil component is 10 to 100% by mass based on a total mass of the lubricating base oil, and a poly(meth)acrylate based viscosity index improver including a structural unit represented by general formula (1): wherein R1 represents hydrogen or a methyl group, and R2 represents a straight or branched hydrocarbon group with 16 or more carbon atoms, and wherein the proportion of the structural unit represented by general formula (1) is 0.5 to 70% by mole, the lubricating oil composition having a kinematic viscosity of 4 to 12 mm2/s at 100° C. and a viscosity index of 140 to 300.Type: GrantFiled: December 3, 2008Date of Patent: February 4, 2014Assignee: Nippon Oil CorporationInventors: Shigeki Matsui, Akira Yaguchi
-
Publication number: 20120283157Abstract: The lubricating oil composition of the invention comprises a lubricating base oil with a 100° C. kinematic viscosity of 1-20 mm2/s, (A) a friction modifier, (B) a first overbased metal salt obtained by overbasing an oil-soluble metal salt with an alkaline earth metal borate, and (C) an overbased second oil-soluble metal salt obtained by overbasing an oil-soluble metal salt with an alkaline earth metal carbonate.Type: ApplicationFiled: September 27, 2010Publication date: November 8, 2012Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Akira Yaguchi, Akio Mutou, Mari Nagae
-
Publication number: 20120283159Abstract: The lubricating oil composition of the invention comprises a lubricating base oil with a 100° C. kinematic viscosity of 1-20 mm2/s, and (A) a viscosity index improver having a ratio M1/M2 of 0.20 or greater, between the total area of the peaks between chemical shifts of 36-38 ppm M1 and the total area of the peaks between chemical shifts of 64-66 ppm M2, with respect to the total area of all of the peaks, in the spectrum obtained by 13C-NMR, (B) a friction modifier, and (C) an overbased metal salt obtained by overbasing an oil-soluble metal salt with an alkaline earth metal borate.Type: ApplicationFiled: September 27, 2010Publication date: November 8, 2012Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Akira Yaguchi, Akio Mutou, Mari Nagae
-
Patent number: 8258087Abstract: A lubricating oil composition for an internal combustion engine. The lubricating oil composition includes: (A1) a lubricant base oil as a main component having a kinematic viscosity at 100 degree C. being 1 to 8 mm2/s, pour point being ?15 degree C. or less, aniline point being 100 degree C. or more, paraffinic content in saturates being 40 mass % or more, monocyclic naphthenic content being 25 mass % or less, bicyclic to hexacyclic naphthenic content being 35 mass % or less, iodine number being 2 or less, and ratio of tertiary carbon to the total carbon atoms composing the (A1) being 6.3% or more. The total mass of the composition is: (B) 0.005 to 0.5 mass % of a metallic detergent as metal content; (C1) 0.005 to 0.2 mass % of a boron-containing succinimide ashless dispersant as boron content; and (D) 0.005 to 0.2 mass % of a metal salt of phosphorus-containing acid as phosphorus content.Type: GrantFiled: December 5, 2007Date of Patent: September 4, 2012Assignee: Nippon Oil CorporationInventor: Akira Yaguchi
-
Publication number: 20120157361Abstract: The lubricating oil composition of the invention includes a lubricating base oil with a kinematic viscosity at 100° C. of 1-6 mm2/s, a % Cp of 70 or greater and a % CA of no greater than 2, and a viscosity index improver which, when added to the lubricating base oil, results in an A/B ratio of less than 3.2 and a C/B ratio of less than 1.5. A is the thickening effect on the kinematic viscosity at 100° C., B is the thickening effect on the HTHS viscosity at 150° C., and C is the thickening effect on the HTHS viscosity at 100° C.Type: ApplicationFiled: August 30, 2010Publication date: June 21, 2012Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Akio Mutou, Akira Yaguchi, Shigeki Matsui
-
Publication number: 20120135900Abstract: The lubricating oil composition of the invention comprises a lubricating base oil with a kinematic viscosity at 100° C. of 1-20 mm2/s, and a viscosity index improver having a ratio M1/M2 of 0.20 or greater, between the total area of the peaks between chemical shifts of 36-38 ppm M1 and the total area of the peaks between chemical shifts of 64-66 ppm M2, with respect to the total area of all of the peaks, in the spectrum obtained by 13C-NMR. The lubricating oil composition of the invention has excellent effects, with a sufficiently high HTHS viscosity at 150° C., and a sufficiently low kinematic viscosity at 40° C., a sufficiently low kinematic viscosity at 100° C. and a sufficiently low HTHS viscosity at 100° C.Type: ApplicationFiled: January 25, 2010Publication date: May 31, 2012Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Shigeki Matsui, Akira Yaguchi, Reiko Kudo, Hiroya Miyamoto, Teppei Tsujimoto
-
Publication number: 20120071374Abstract: A lubricant oil composition comprising: a lubricant base oil whose kinematic viscosity at 100° C. is 1 to 6 mm2/s, % Cp is not less than 70, and % CA is not more than 2; a first viscosity index improver in which the ratio A/B of a viscosity increasing effect A in the equation (1) to a viscosity increasing effect B in the equation (2) when added to the lubricant base oil is a value of not less than 4.5, and a PSSI is not more than 30; and a second viscosity index improver in which the ratio A/B when added to the lubricant base oil is a value less than 4.5: A=X?X0 ??(1) B=Y?Y0 ??(2) wherein A represents a viscosity increasing effect of the kinematic viscosity at 100° C., B represents a viscosity increasing effect of the HTHS viscosity at 150° C., X represents a kinematic viscosity at 100° C. of a mixture of the lubricant base oil with 3% by mass of the first or second viscosity index improver, X0 represents a kinematic viscosity at 100° C.Type: ApplicationFiled: January 25, 2010Publication date: March 22, 2012Applicant: JX NIPPON OIL & ENERGY CORPORATIONInventors: Akira Yaguchi, Shigeki Matsui, Teppei Tsujimoto