Patents by Inventor James G. Spruill

James G. Spruill 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).

  • Rosin modified styrene acrylic resin
    Patent number: 5019622
    Abstract: A rosin modified acrylic resin for use in a toner composition is provided. The resin is prepared by steam stripping a mixture of solution polymerized styrene-acrylic copolymer rosin, and a suitable solvent, such as toluene or xylene, followed by cooling and grinding to form the styrene acrylic-rosin resin. This binder resin can be used in a toner composition which, due to the resin, has an inherent positive charge of at least 2.0.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: May 28, 1991
    Assignee: Resinall Corporation
    Inventors: Roger E. Burke, James G. Spruill