Patents by Inventor David Kassin

David Kassin 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).

  • Processes for preparing organic pigment dispersions and ink
    Patent number: 7947126
    Abstract: A method for preparing an organic pigment dispersion, such as a flush pigment or ink product, comprises steps of introducing into a twin screw extruder a stable, water-borne pigment dispersion, an organic medium, and a destabilizing agent; mixing together the stable, water-borne pigment dispersion, the organic medium, and the destabilizing agent to produce a pigment flush phase and a water phase; and removing at least a part of the water phase. A twin-screw extruder for carrying out the flushing method has an addition and flushing zone, a water removal zone, and a zone for rinsing the crude organic pigment dispersion or flush with water and removing the rinse water. Additional materials may be added to form a finished pigmented product such as an ink product, masterbatch, or toner.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: May 24, 2011
    Assignee: Flint Group Incorporated
    Inventors: Christopher M. Teeley, David Kassin, Douglas L. Cochran, Christopher B. Palmer, Norman E. Pratt
  • Processes for preparing organic pigment dispersions and ink
    Publication number: 20060037517
    Abstract: A method for preparing an organic pigment dispersion, such as a flush pigment or ink product, comprises steps of introducing into a twin screw extruder a stable, water-borne pigment dispersion, an organic medium, and a destabilizing agent; mixing together the stable, water-borne pigment dispersion, the organic medium, and the destabilizing agent to produce a pigment flush phase and a water phase; and removing at least a part of the water phase. A twin-screw extruder for carrying out the flushing method has an addition and flushing zone, a water removal zone, and a zone for rinsing the crude organic pigment dispersion or flush with water and removing the rinse water. Additional materials may be added to form a finished pigmented product such as an ink product, masterbatch, or toner.
    Type: Application
    Filed: August 15, 2005
    Publication date: February 23, 2006
    Applicant: Flint Ink Corporation
    Inventors: Christopher Teeley, David Kassin, Douglas Cochran, Christopher Palmer, Norman Pratt