Patents by Inventor Wonjin Yoon

Wonjin Yoon 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).

  • Low viscosity diesel engine oil composition with improved fuel efficiency
    Patent number: 9085743
    Abstract: The present invention provides an engine oil composition containing polymethylacrylate, zinc alkyldithiophosphate, molybdenum dithiocarbamate, a hindered phenol antioxidant, and a fixed mineral oil. The engine oil composition of the present invention has a low-temperature viscosity The fuel efficiency of the engine oil is improved, when the engine oil composition with an improved low-temperature performance, a maintained high-temperature viscosity, an improved wear resistance, and an improved oxidation resistance is used. Further, the durability of the engine oil can also be ensured when the engine oil composition of the present invention is used.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: July 21, 2015
    Assignees: Hyundai Motor Company, Kia Motors Corporation, S-Oil Corporation
    Inventors: WonJin Yoon, Do-Kon Jeong
  • LOW VISCOSITY DIESEL ENGINE OIL COMPOSITION WITH IMPROVED FUEL EFFICIENCY
    Publication number: 20120028862
    Abstract: The present invention provides an engine oil composition containing polymethylacrylate, zinc alkyldithiophosphate, molybdenum dithiocarbamate, a hindered phenol antioxidant, and a fixed mineral oil. The engine oil composition of the present invention has a low-temperature viscosity The fuel efficiency of the engine oil is improved, when the engine oil composition with an improved low-temperature performance, a maintained high-temperature viscosity, an improved wear resistance, and an improved oxidation resistance is used. Further, the durability of the engine oil can also be ensured when the engine oil composition of the present invention is used.
    Type: Application
    Filed: November 4, 2010
    Publication date: February 2, 2012
    Applicants: Hyundai Motor Company, S-Oil Corporation, Kia Motors Corporation
    Inventors: Do-Kon Jeong, Wonjin Yoon
  • LONG-LIFE GASOLINE ENGINE OIL COMPOSITION
    Publication number: 20110071062
    Abstract: The present invention provides a long-life gasoline engine oil composition, which contains a hydrogenated styrene-diene compound, zinc alkyldithiophosphate, monoalkyl molybdenum dithiocarbamate, polyol ester, a hindered phenol antioxidant, and a base oil. With this composition, vehicle fuel efficiency can be improved, oxidation stability can be increased, and the life span of engine oil can be extended.
    Type: Application
    Filed: April 1, 2010
    Publication date: March 24, 2011
    Applicants: Hyundai Motor Company, Kia Motors Corporation, S-Oil Corporation
    Inventors: Do-Kon Jeong, Wonjin Yoon