Patents by Inventor Errol Joseph Olivier

Errol Joseph Olivier 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).

  • Grafted multi-functional olefin copolymer VI modifiers and uses thereof
    Patent number: 7253231
    Abstract: A novel highly grafted, multi-functional olefin copolymer is provided comprising an additive reaction product of a method comprising reacting acylating agent with an olefin copolymer having a number average molecular weight greater than about 1,000 in the presence of a free radical initiator and essentially free of hydrocarbon solvent in an extruder to provide an olefin copolymer intermediate comprising an acylated olefin copolymer having a degree of grafting (DOG) of at least 0.5 wt. %, which copolymer intermediate's molecular weight is reduced, vacuum stripped of unreacted components, pelletized, dissolved in a neutral oil (preferably with inert gas sparging), and further reacted with a polyamine to provide a grafted multi-functional olefin copolymer viscosity modifier, and lubricating oil concentrates and compositions containing the same and uses thereof.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: August 7, 2007
    Assignee: Afton Chemical Corporation
    Inventors: Cathy C. Devlin, Charles A. Passut, Joe S. Bradley, Michael A. Danylo, Yoon Song, Sanjay Srinivasan, Zhaoyao Joe Qiu, Errol Joseph Olivier, Patric Meessen, Gerhard Van Vliet, Gerardus Arnoldus Rademakers, Johannes Hendrik Geesink