Patents by Inventor Jim Lee Pearson

Jim Lee Pearson 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 continuously forming an aqueous colorant dispersion using a screw extruder
    Patent number: 9052625
    Abstract: A continuous process for making a pigment dispersion includes continuously feeding a pigment into a feed section of a screw extruder at a controlled rate, continuously feeding a surfactant into the feed section of the screw extruder at a controlled rate, continuously feeding water downstream of the feed section to emulsify the pigment and the surfactant, forming a water-in-pigment dispersion, continuously feeding additional water downstream of the previously fed water to cause a phase inversion of the water-in-pigment dispersion, forming a pigment-in-water dispersion, continuously homogenizing the pigment-in-water dispersion in the screw extruder to create a homogenous aqueous pigment dispersion and collecting the homogenous aqueous pigment dispersion from an exit section of the screw extruder.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 9, 2015
    Assignee: XEROX CORPORATION
    Inventors: Joo T. Chung, Chieh-Min Cheng, Steven M. Malachowski, Eric David Godshall, Jim Lee Pearson
  • METHOD OF CONTINUOUSLY FORMING AN AQUEOUS COLORANT DISPERSION USING A SCREW EXTRUDER
    Publication number: 20140261083
    Abstract: A continuous process for making a pigment dispersion includes continuously feeding a pigment into a feed section of a screw extruder at a controlled rate, continuously feeding a surfactant into the feed section of the screw extruder at a controlled rate, continuously feeding water downstream of the feed section to emulsify the pigment and the surfactant, forming a water-in-pigment dispersion, continuously feeding additional water downstream of the previously fed water to cause a phase inversion of the water-in-pigment dispersion, forming a pigment-in-water dispersion, continuously homogenizing the pigment-in-water dispersion in the screw extruder to create a homogenous aqueous pigment dispersion and collecting the homogenous aqueous pigment dispersion from an exit section of the screw extruder.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Xerox Corporation
    Inventors: Joo CHUNG, Chieh-Min Cheng, Steven M. Malachowski, Eric David Godshall, Jim Lee Pearson