Patents by Inventor James Andrew Ward

James Andrew Ward 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).

  • High solids glyoxalated polyacrylamide
    Patent number: 8435382
    Abstract: Storage-stable glyoxalated polyacrylamide polymers and high solids aqueous compositions formulated with them are described. These glyoxalated polyacrylamide compositions can be used as additives for papermaking, providing paper with good dry and temporary wet strength, and increasing papermaking de-watering rates.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: May 7, 2013
    Assignee: Buckman Laboratories International, Inc.
    Inventors: Chen Lu, James Andrew Ward
  • Methods to reduce organic impurity levels in polymers and products made therefrom
    Patent number: 7803899
    Abstract: Various methods are described for preparing dry water-soluble polymers with reduced organic impurity content by combining water-soluble polymer in water with at least one dry polar solvent to form a mixture that separates into a first layer comprising a majority of the solvent and water and a second layer comprising a majority of the polymer, then separating the layers and drying the second layer to obtain a solid comprising the water-soluble polymer. Further, or solid polymer products having reduced organic impurity levels and/or moisture content are also described.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: September 28, 2010
    Assignee: Buckman Laboratories International, Inc.
    Inventors: Mark L. Zollinger, James Andrew Ward