Patents Examined by Glenn Calddarola
  • Sulfurized polyisobutylene based wear and oxidation inhibitors
    Patent number: 7414013
    Abstract: Sulfurized olefin compositions and compounds of the formula: wherein R1 is hydrogen or methyl; X is sulfur or oxygen; m is an integer from 1 to 9; and n is 0 or 1, and when n is 0 then R1 is methyl, and when n is 1 then R1 is hydrogen are disclosed. The resulting compounds are particularly the polyisobutyl-1,2-dithiole-4-cyclopentene-3-thione compounds and derivatives are useful in lubricating oils.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: August 19, 2008
    Assignee: Chevron Oronite Company LLC
    Inventors: Kenneth D. Nelson, Frank Plavac