Patents by Inventor Carol A. Senkler

Carol A. Senkler 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).

  • Positive solid block toner
    Patent number: 4925764
    Abstract: Positively chargeable toner containing block copolymers for electrostatic reprography, giving improved compatibility with the toner resin. Preferred are block copolymers of styrene with methyl methacrylate and butyl methacrylate as one block and dimethylaminoethyl methacrylate as the other block, quaternized with methyl tosylate or benzyl chloride.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: May 15, 1990
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: Dennis G. Madeleine, Carol A. Senkler, Loretta A. Grezzo Page