Patents Represented by Attorney Norby Foss

Find this attorney in the Justia Lawyer Directory

  • Long life lubricating oil composition with very low phosphorus content
    Patent number: 7183241
    Abstract: A lubricating oil with very low phosphorus content, and having long life as evidenced by a reduction in viscosity increase, oxidation and nitration, comprises a major amount of a base oil of lubricating viscosity and a minor amount of a mixture of neutral and overbased metallic detergents, at least a zinc dialkyldithiocarbamate and a zinc dialkyldithiophosphate antiwear additive and at least a dihydrocarbylthiocarbamoyl.
    Type: Grant
    Filed: September 19, 2003
    Date of Patent: February 27, 2007
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: Stanley James Cartwright