Patents by Inventor Britawit Asfaw

Britawit Asfaw 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
  • Toner compositions
    Patent number: 7736832
    Abstract: Toners made by the emulsion aggregation process comprising an amorphous resin and a nucleated crystalline resin. Such toners demonstrate improved charging performance in the A-zone and the C-zone, improved heat cohesion and improved resistivity.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: June 15, 2010
    Assignee: Xerox Corporation
    Inventors: Valerie M. Farrugia, Michael S. Hawkins, Rosa M. Duque, Britawit Asfaw, Richard P. N. Veregin, Guerino G. Sacripante