Patents by Inventor William B. Diana

William B. Diana 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).

  • Dispersant additives and process
    Patent number: 5936041
    Abstract: The invention pertains to improved lubricating oil dispersants wherein a fractionating polymer is prepared prior to functionalization (e.g., in the Koch reaction) for making dispersant additives. In one aspect, it was discovered that by fractionating a polymer to remove light hydrocarbon and unreacted monomer from the polymer before the carbonylation step of the Koch reaction, the amount of light ester impurities generated was minimized. Light ester is an undesirable byproduct that adversely affects the recycle of the catalyst from the functionalization step of the Koch reaction. The invention also pertains to improved lubricating oil nitrogen-containing dispersant additives derived from fractionated polymer.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: August 10, 1999
    Assignee: Exxon Chemical Patents Inc
    Inventors: William B. Diana, Joseph V. Cusumano, Keith R. Gorda, Jacob Emert, William B. Eckstrom, David C. Dankworth, Jon E. Stanat, James P. Stokes
  • Dispersant additives and process
    Patent number: 5804667
    Abstract: The invention pertains to improved lubricating oil dispersants wherein a fractionating polymer is prepared prior to functionalization (e.g., in the Koch reaction) for making dispersant additives. In one aspect, it was discovered that by fractionating a polymer to remove light hydrocarbon and unreacted monomer from the polymer before the carbonylation step of the Koch reaction, the amount of light ester impurities generated was minimized. Light ester is an undesirable byproduct that adversely affects the recycle of the catalyst from the functionalization step of the Koch reaction. The invention also pertains to improved lubricating oil nitrogen-containing dispersant additives derived from fractionated polymer.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: September 8, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: William B. Diana, Joseph V. Cusumano, Keith R. Gorda, Jacob Emert, William B. Eckstrom, David C. Dankworth, Jon E. Stanat, James P. Stokes