Patents Examined by James M. Sibermann
  • Composition for controlling silica and water soluble silicate deposition
    Patent number: 5393456
    Abstract: A method for the inhibition of silica and silicate deposits on the internal surfaces of a water system consisting of adding to the water system a composition comprised of a blend of two water soluble copolymers. The first copolymer contains repeat units of maleic or acrylic acids and a phosphinic acid, or salt forms thereof. The second copolymer contains repeat units of acrylic acid and allyl hydroxy propyl sulfonate ether, or salt forms thereof.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: February 28, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: Libardo A. Perez, J. Michael Brown, Khac T. Nguyen