Patents by Inventor Susan T. Robertson

Susan T. Robertson 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).

  • Silica scale inhibition
    Patent number: 5277823
    Abstract: A method for inhibiting silica scale formation in aqueous systems using selected low molecular weight (meth)acrylic or maleic acid based copolymers or terpolymers, magnesium ion alone, or the selected copolymers and terpolymers with aluminum ion or magnesium ion, or polyacrylic or polymaleic acid with aluminum ion or magnesium ion.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: January 11, 1994
    Assignee: Rohm and Haas Company
    Inventors: William M. Hann, Judy H. Bardsley, Susan T. Robertson, Jan E. Shulman