Patents by Inventor Stephen Paul Rannard

Stephen Paul Rannard 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).

  • Azetidinium modified polymers and fabric treatment composition
    Patent number: 7429558
    Abstract: The invention relates to a fabric treatment composition which comprises a self-crosslinking polymer possessing pendant azetidinium groups. A first aspect of the invention comprises an azetidinium functionalized polymer containing primary or secondary amine groups. Cross-linking reactions between the azetidinium group and primary or secondary amine groups do not form quaternary groups and consequently do not result in a charged, cross-linked polymer. This lack of charge is believed to overcome the problems of stain fixing and dye adsorption. A second aspect of the present invention subsists in an azetidinium functionalized polymer of which the monomers comprise: an amino-acrylate and/or amino-alkacrylate monomer, and, optionally, further non-amino acrylate and/or alkacrylate monomer.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: September 30, 2008
    Assignee: Unilever Home & Personal Care division of Conopco, Inc.
    Inventors: Stephen Norman Batchelor, Paul Hugh Findlay, Joseph Edward Hunter, Andrew Philip Parker, Stephen Paul Rannard