Patents by Inventor Andrew S. Chisarik

Andrew S. Chisarik 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).

  • Copolymers for the control of the formation and deposition of materials in aqueous mediums
    Patent number: 4288327
    Abstract: The present invention relates to processes for controlling the formation and deposition of scale and sludge and in particular calcium phosphate which would otherwise occur in aqueous mediums containing sludge and the ions capable of forming scale. The invention, more particularly, relates to the control, reduction and/or prevention of scale and sludge deposits in cooling water, scrubber and steam generating systems, evaporators, economizers, and the like by the introduction of a copolymer comprising sulfonated styrene and maleic anhydride moieties to the water used therein. The copolymers discovered to be particularly effective for the purpose are those having a mole ratio of sulfonated styrene moieties to moieties derived from maleic anhydride of from about 2:1 to about 4:1 and preferably 2:1 to 3:1 with certain type deposits.
    Type: Grant
    Filed: January 19, 1979
    Date of Patent: September 8, 1981
    Assignee: Betz Laboratories, Inc.
    Inventors: Irene T. Godlewski, Joseph J. Schuck, Andrew S. Chisarik