Patents by Inventor Nancy A. DiAngelo

Nancy A. DiAngelo 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).

  • Inhibition of calcium oxalate scale in aqueous based solutions
    Patent number: 5755971
    Abstract: A method of inhibiting the precipitation and deposition of calcium oxalate scale in an aqueous system is disclosed, in which an effective amount of a combination of a high molecular weight lignosulfonate compound and a phosphate compound is added to the system.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: May 26, 1998
    Assignee: BetzDearborn Inc.
    Inventors: William J. Palardy, Nancy A. DiAngelo
  • Inhibition of organic deposition using additives to retard settling
    Patent number: 5681432
    Abstract: Methods for inhibiting organic fouling of heat transfer surfaces in contact with an alcohol distillation stream are discussed. The methods include adding to the alcohol distillation stream an effective inhibiting amount of a treatment including a high molecular weight anionic polymer.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: October 28, 1997
    Assignee: BetzDearborn Inc.
    Inventors: William J. Palardy, Nancy A. DiAngelo
  • Methods for inhibiting the deposition of proteinaceous materials on heat transfer surfaces
    Patent number: 5336414
    Abstract: Methods for controlling the formation of proteinaceous fouling deposits in high temperature evaporators and concentrators as employed in processing steepwater in the wet milling of corn. The methods comprise adding lecithin, or a long chain fatty acid to the steepwater in an amount ranging from about 150 parts per million to about 500 parts per million steepwater.
    Type: Grant
    Filed: March 17, 1993
    Date of Patent: August 9, 1994
    Assignee: Betz Laboratories, Inc.
    Inventor: Nancy A. DiAngelo