Patents Assigned to A. S. Incorporated
  • Patent number: 6649071
    Abstract: A treatment effective for removing or substantially reducing the amount of Cr+6 present in drinking water or wastewater is described. The method includes adding a stannous salt of a non-carbon acid, in an amount effective to reduce most or substantially all of the chromic ion in the water.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: November 18, 2003
    Assignee: A. S. Incorporated
    Inventor: William E. Stapp
  • Patent number: 6200529
    Abstract: Effective corrosion inhibitors having minimal organic content, particularly suitable for use in municipal drinking water systems, are described. The preferred corrosion inhibiting additive is an aqueous solution of a stannous halide, preferably stannous chloride.
    Type: Grant
    Filed: July 26, 1999
    Date of Patent: March 13, 2001
    Assignee: A. S. Incorporated
    Inventor: Olen L. Riggs, Jr.