Patents by Inventor William D. Hardigan

William D. Hardigan 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).

  • Pigment dispersants with primary amine functionality suitable for use in cathodic electrocoat compositions
    Patent number: 5536776
    Abstract: A compound that is useful as a dispersant for pigments in waterborne coating compositions, particularly in cathodic electrocoat compositions, is described. The compound comprises an acrylic backbone having a pigment-interactive substituent and a stabilizing substituent. The pigment-interactive substituent has at least one primary amino group. The stabilizing substituent comprises an alkoxy-terminated polyalkylene oxide structure. The dispersant is useful in preparing electrocoat coating compositions.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: July 16, 1996
    Assignee: BASF Corporation
    Inventors: Clint W. Carpenter, Timothy S. December, William D. Hardigan
  • Pigment dispersants with primary amine functionality suitable for use in cathodic electrocoat compositions
    Patent number: 5527614
    Abstract: A compound that is useful as a dispersant for pigments in waterborne coating compositions, particularly in cathodic electrocoat compositions, is described. The compound comprises an acrylic backbone having a pigment-interactive substituent and a stabilizing substituent. The pigment-interactive substituent has at least one primary amino group. The stabilizing substituent comprises an alkoxy-terminated polyalkylene oxide structure. The dispersant is useful in preparing electrocoat coating compositions.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: June 18, 1996
    Assignee: BASF Corporation
    Inventors: Clint W. Carpenter, Timothy S. December, William D. Hardigan