Patents by Inventor Joanne Margaret Holloway

Joanne Margaret Holloway 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).

  • Toner containing inorganic ceramic color
    Patent number: 6110632
    Abstract: The present invention is directed to electrostatic printing toner particles comprising 71 to 90 weight percent of inorganic ceramic color and 29 to 10 weight percent of an organic polymeric material. A two-part developer comprising a carrier and the ceramic toner is characterized in that the ceramic toner is present in an amount of about 2 to 24 weight percent of the developer and the toner comprises 50 to 85 weight percent of the inorganic ceramic color and 50 to 15 weight percent of polymeric material. Typically, the ceramic color comprises a ceramic pigment and a glass frit.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: August 29, 2000
    Assignee: Cookson Matthey Ceramics PLC
    Inventors: Dominic Manton Dunford, Desmond Gerard Eadon, Iona Gwawr Evans, Geraldine Bridget Martina Hogan, Joanne Margaret Holloway, David Gregory Richards, Andrew Edward Sutton