Patents by Inventor Chad C. Roberts

Chad C. Roberts 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).

  • Method of preparing a pigment press cake and uses thereof
    Patent number: 9458321
    Abstract: A process for preparing a pigment press cake is provided in which a pigment, a grinding agent, a polyetheramine, and a vehicle are subjected to grinding, followed by removal of the grinding agent and the vehicle to form a press cake. Also disclosed are a process to disperse the press cake with a polymeric dispersant in an aqueous vehicle to form a pigment dispersion and using the dispersion to form an aqueous ink jet ink.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: October 4, 2016
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: James A. Silver, Chad C. Roberts, Christian Jackson
  • METHOD OF PREPARING A PIGMENT PRESS CAKE AND USES THEREOF
    Publication number: 20150322267
    Abstract: A process for preparing a pigment press cake is provided in which a pigment, a grinding agent, a polyetheramine, and a vehicle are subjected to grinding, followed by removal of the grinding agent and the vehicle to form a press cake. Also disclosed are a process to disperse the press cake with a polymeric dispersant in an aqueous vehicle to form a pigment dispersion and using the dispersion to form an aqueous ink jet ink.
    Type: Application
    Filed: June 27, 2013
    Publication date: November 12, 2015
    Inventors: James A. Silver, Chad C. Roberts, Christian Jackson