Patents by Inventor Roxan Richards-Johnson

Roxan Richards-Johnson 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).

  • UV red fluorescent EA toner
    Patent number: 8974993
    Abstract: The present disclosure relates to a toner design for a clear UV red fluorescence toner having a high lanthanide complex pigment loading, including methods of making the fluorescence toner using a saccharide or a sugar acid to avoid complexation of lanthanide ions from the pigment, with lower aggregation and coalescence temperatures in the preparation of toner particles, where the particles exhibit a narrow size distribution and good xerographic performance.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: March 10, 2015
    Assignee: Xerox Corporation
    Inventors: Roxan Richards-Johnson, Jordan H Wosnick, Karen A Moffat, Edward Graham Zwartz, Britawit Asfaw, Richard P N Veregin, Cuong Vong, Eric Rotberg
  • UV Red Fluorescent EA Toner
    Publication number: 20140197364
    Abstract: The present disclosure relates to a toner design for a clear UV red fluorescence toner having a high lanthanide complex pigment loading, including methods of making the fluorescence toner using a saccharide or a sugar acid to avoid complexation of lanthanide ions from the pigment, with lower aggregation and coalescence temperatures in the preparation of toner particles, where the particles exhibit a narrow size distribution and good xerographic performance.
    Type: Application
    Filed: January 15, 2013
    Publication date: July 17, 2014
    Applicant: Xerox Corporation
    Inventors: Roxan Richards-Johnson, Jordan H. Wosnick, Karen A. Moffat, Edward Graham Zwartz, Biritawit Asfaw, Richard P.N. Veregin, Cuong Vong, Eric Rotberg