Patents Assigned to Exxon Research & Engineering Co./Hatco Corp.
  • Technical pentaerythritol esters as lubricant base stock
    Patent number: 5503761
    Abstract: A synthetic ester base stock having reduced deposit formation which comprises the reaction product of technical pentaerythritol and a mixture of carboxylic acids. The mixture of carboxylic acids comprises (1) at least one C.sub.8 -C.sub.10 carboxylic acid having 6 or less reactive hydrogens, (2) at least one C.sub.5 -C.sub.7 carboxylic acid having 6 or less reactive hydrogens and (3) at least one C.sub.6 -C.sub.10 carboxylic acid having 6 or more reactive hydrogens.
    Type: Grant
    Filed: August 2, 1994
    Date of Patent: April 2, 1996
    Assignee: Exxon Research & Engineering Co./Hatco Corp.
    Inventors: Thomas L. Ashcraft, Jr., Paul J. Berlowitz, Max J. Wisotsky, Dale D. Carr, Thomas G. Schaefer