Patents by Inventor Cheng Kuo

Cheng Kuo 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).

  • Lubricants containing molybdenum compounds, phenates and diarylamines
    Patent number: 6174842
    Abstract: There is disclosed a lubricating oil composition which contains from about 50 to 1000, preferably 50 to 500 parts per million of molybdenum from a molybdenum compound which is oil-soluble and substantially free of reactive sulfur, about 1,000 to 20,000, preferably 1,000 to 10,000 parts per million of a diarylamine and about 2,000 to 40,000 parts per million of a phenate. This combination of ingredients provides improved oxidation control and improved deposit control to the lubricating oil. The composition is particularly suited for use as a crankcase lubricant.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: January 16, 2001
    Assignee: Ethyl Corporation
    Inventors: Vincent James Gatto, Edmund F. Perozzi, Cheng Kuo