Patents by Inventor Colin Wayne Hansen

Colin Wayne Hansen 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 varnish gloss performance using novel pigment and process for making same
    Patent number: 7468101
    Abstract: A high solids precipitated calcium carbonate (PCC) suspension and method for producing the suspension are provided, with the PCC having a PCC particle size distribution d90 value of about 0.7 microns or less, a PCC particle size distribution d50 value of about 0.4 microns or less, a PCC particle size distribution d90/d50 ratio of from about 1.2 to about 2.2 and a PCC specific surface area of about 10.0 meters squared per gram or greater.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: December 23, 2008
    Assignee: Specialty Minerals (Michigan) Inc.
    Inventors: Colin Wayne Hansen, Larry Joseph Zeiner, Neil V. Pagotto
  • UV varnish gloss performance using novel pigment and process for making same
    Publication number: 20080041275
    Abstract: A high solids precipitated calcium carbonate (PCC) suspension and method for producing the suspension are provided, with the PCC having a PCC particle size distribution d90 value of about 0.7 microns or less, a PCC particle size distribution d50 value of about 0.4 microns or less, a PCC particle size distribution d90/d50 ratio of from about 1.2 to about 2.2 and a PCC specific surface area of about 10.0 meters squared per gram or greater.
    Type: Application
    Filed: August 17, 2006
    Publication date: February 21, 2008
    Inventors: Colin Wayne Hansen, Larry Joseph Zeiner, Neil V. Pagotto
  • Dewatering of calcium carbonate
    Patent number: 6123855
    Abstract: The present invention relates to dewatering of an aqueous slurry of calcium carbonate. More particularly, the present invention relates to the use of non-ionic surfactants in dewatering aqueous slurries of an aragonitic precipitated calcium carbonate. Calcium carbonate slurries dewatered using the non-ionic surfactants of the present invention have higher weight percent solids, decreased dispersant demand, and result in higher productivity.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: September 26, 2000
    Assignee: Minerals Technologies Inc.
    Inventors: Colin Wayne Hansen, Christopher Alan Wener, I