Patents by Inventor Nobuchika Kawagoishi

Nobuchika Kawagoishi 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).

  • Lubricant oil composition for diesel engines (LAW964)
    Patent number: 7148186
    Abstract: The present invention provides a lubricant oil composition, having enhanced wear-preventive characteristics for a diesel engine operating with large quantities of soot in the oil (soot content: 0.2 to 4.0 wt. %), and is especially suitable for a pressure-accumulating (common rail) type diesel engine equipped with an EGR system. The lubricant oil composition containing a base oil composed of a mineral and/or synthetic oil incorporated with at least three additives that are a sulfurized oxymolybdenum dithiocarbamate at 0.03 to 0.50 wt. % as Mo; a zinc dialkyl dithiophosphate at 0.04 to 0.50 wt. % as P; and at least one metallic salt of alkyl salicylate selected from the group consisting of a Ca salt of alkyl salicylate at 0.004 to 1.0 wt. % as Ca, Mg salt of alkyl salicylate at 0.002 to 0.60 wt. % as Mg, and Zn salt of alkyl salicylate at 0.006 to 1.60 wt. % as Zn, all percentages being based on the whole composition.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: December 12, 2006
    Assignee: TonenGeneral Sekiyu K.K.
    Inventors: Toshiaki Kuribayashi, Nobuchika Kawagoishi, Satoshi Ogano
  • Lubricant oil composition for internal combustion engines (law859)
    Patent number: 6638897
    Abstract: The lubricating oil of the present invention exhibits an excellent effect of agglomerating solid impurity particles it contains to a sufficiently large size as to be captured and removed by an oil filter.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: October 28, 2003
    Assignee: TonenGeneral Sekiyu K.K.
    Inventors: Satoshi Ogano, Nobuchika Kawagoishi, Makota Yoneda, Toshiaki Kuribayashi
  • Lubricant oil composition for diesel engines (LAW964)
    Publication number: 20030148899
    Abstract: The present invention provides a lubricant oil composition, having enhanced wear-preventive characteristics for a diesel engine operating with large quantities of soot in the oil (soot content: 0.2 to 4.0 wt. %), and is especially suitable for a pressure-accumulating (common rail) type diesel engine equipped with an EGR system. The lubricant oil composition containing a base oil composed of a mineral and/or synthetic oil incorporated with at least three additives that are a sulfurized oxymolybdenum dithiocarbamate at 0.03 to 0.50 wt. % as Mo; a zinc dialkyl dithiophosphate at 0.04 to 0.50 wt. % as P; and at least one metallic salt of alkyl salicylate selected from the group consisting of a Ca salt of alkyl salicylate at 0.004 to 1.0 wt. % as Ca, Mg salt of alkyl salicylate at 0.002 to 0.60 wt. % as Mg, and Zn salt of alkyl salicylate at 0.006 to 1.60 wt. % as Zn, all percentages being based on the whole composition.
    Type: Application
    Filed: March 7, 2003
    Publication date: August 7, 2003
    Inventors: Toshiaki Kuribayashi, Nobuchika Kawagoishi, Satoshi Ogano
  • LUBRICANT OIL COMPOSITION FOR INTERNAL COMBUSTION ENGINES
    Publication number: 20010053750
    Abstract: The lubricating oil of the present invention exhibits an excellent effect of agglomerating solid impurity particles it contains to a sufficiently large size as to be captured and removed by an oil filter.
    Type: Application
    Filed: July 9, 1999
    Publication date: December 20, 2001
    Inventors: SATOHI OGANO, NOBUCHIKA KAWAGOISHI, MAKOTO YONEDA, TOSHIAKI KURIBAYASHI