Patents by Inventor Sandra L. Whitney

Sandra L. Whitney 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).

  • Stabilization of soluble manganese and its reaction products
    Patent number: 4552665
    Abstract: The instant invention is directed to a process for inhibiting the precipitation of dissolved manganese ion and its reaction products in aqueous solutions, comprising adding to the aqueous solution 0.1 to 20 ppm of a copolymer of an unsaturated carboxylic acid or salt selected from the group consisting of acrylic acid and methacrylic acid and an unsaturated sulphonic acid or salt selected from the group consisting of 2-acrylamido-2-methylpropylsulphonic acid and 2-methacrylamido-2-methylpropylsulphonic acid.
    Type: Grant
    Filed: May 4, 1984
    Date of Patent: November 12, 1985
    Assignee: Calgon Corporation
    Inventors: Paul H. Ralston, Sandra L. Whitney
  • Control of scale in sugar evaporation equipment
    Patent number: 4452703
    Abstract: The instant invention is directed to a method for preventing the formation of scale in sugar evaporation equipment comprising adding to the juice from 0.1 to 200 ppm of a polycarboxylic acid or its salt selected from the group consisting of polymaleic acid, amine adducts of maleic anhydride polymers, phosphonobutane tri-carboxylic acid, phosphinocarboxylic acids and copolymers of acrylic acid and an hydroxylated lower alkyl acrylate.
    Type: Grant
    Filed: May 24, 1983
    Date of Patent: June 5, 1984
    Assignee: Calgon Corporation
    Inventors: Paul H. Ralston, Sandra L. Whitney, Jerry L. Walker
  • Polyphosphoric acid as a scale and corrosion inhibitor
    Patent number: 4436628
    Abstract: The instant invention is directed to a process for the inhibition of scale and corrosion formation in an aqueous system, comprising adding to the system about 0.1 to 100 ppm, by weight based on the total aqueous content of said system, of 103 to 115% polyphosphoric acid, or neutral salts thereof.
    Type: Grant
    Filed: September 20, 1982
    Date of Patent: March 13, 1984
    Assignee: Calgon Corporation
    Inventors: Paul H. Ralston, Sandra L. Whitney