Patents Assigned to Texaco Inc., White
  • Cyclized unsaturated keto acids
    Patent number: 4701553
    Abstract: Unsaturated cyclic keto acid may be prepared by cyclizing alken-2-yl dicarboxylic acid anhydride with Lewis acid catalyst in anhydrous Friedel-Craft solvent. Amides of these unsaturated cyclic keto acids useful as friction improvers in lubricating oils, may be prepared by reaction of an amine such as ethanolamine with an unsaturated cyclic keto acid.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: October 20, 1987
    Assignee: Texaco Inc., White
    Inventor: Justin C. Powell