Patents Represented by Attorney, Agent or Law Firm Robert F. Thompson
  • Ink compositions and processes
    Patent number: 6548571
    Abstract: A process for the preparation of an ink which comprises mixing an ink vehicle, a colorant and a latex generated by the polymerization of a mixture of olefinic monomers, wherein at least one of said olefinic monomers is an ionic sulfonate monomer and which polymerization is accomplished in the presence of an anionic surfactant, and a nonionic surfactant.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: April 15, 2003
    Assignee: Xerox Corporation
    Inventors: Chieh-Min Cheng, Min-Hong Fu