Patents by Inventor Kenneth P. Fivizzani

Kenneth P. Fivizzani 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).

  • Use of molybdate as corrosion inhibitor in a zinc/phosphonate cooling water treatment
    Patent number: 5320779
    Abstract: A corrosion inhibitor treatment composition for cooling water systems is disclosed in which no chromate is used and no free orthophosphate is present comprising a combination of a localized corrosion inhibitor in the form of a salt of molybdenum, vanadium, or tungsten, a general corrosion and scale inhibitor comprising zinc or nickel, a pair of organic phosphonates, and a stabilizing agent.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: June 14, 1994
    Assignee: Nalco Chemical Company
    Inventor: Kenneth P. Fivizzani
  • Method for inhibiting scale formation and/or dispersing iron in reverse osmosis systems
    Patent number: 5256303
    Abstract: A method for inhibiting calcium sulfate scale formation and deposition and/or dispersing iron from a feedstream passing through a reverse osmosis system which comprises the steps of: controlling the pH of the feedstream within the range between about 6.0 to about 7.0; controlling the temperature of the feedstream within the range between about 50.degree. to about 80.degree. F.; and adding a scale inhibitor and/or iron disperant to the feedstream in an amount between about 0.002 ppm per ppm hardness (as CaCO.sub.3) of the feedstream to about 0.005 ppm per ppm hardness (as CaCO.sub.3) of the feedstream, the scale inhibitor comprising a water-soluble organic phosphonate and an N-substituted acrylamide polymer containing an amide structure as follows: ##STR1## where R.sub.2 is hydrogen or methyl, R.sub.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: October 26, 1993
    Assignee: Nalco Chemical Company
    Inventors: E. H. Kelle Zeiher, Cynthia A. Soderquist, Claudia C. Pierce, Kenneth P. Fivizzani
  • Use of molybdate as a cooling water corrosion inhibitor at higher temperatures
    Patent number: 5192447
    Abstract: A corrosion inhibitor treatment composition for cooling water systems at elevated temperatures in which no chromate is used is disclosed, comprising a combination of a localized corrosion inhibitor in the form of a salt of molybdenum, vanadium, or tungsten, a reduced level of a general corrosion and scale inhibitor comprising zinc, nickel or a combination thereof, orthophosphate, an organic phosphonate, and a stabilizing agent.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: March 9, 1993
    Assignee: Nalco Chemical Company
    Inventor: Kenneth P. Fivizzani
  • Stabilization of manganese in aqueous systems
    Patent number: 4963267
    Abstract: The precipitate species of manganese in the presence of an oxidative condition in the waters of an aqueous system can be diminished by treating such waters with certain amide-containing polymer.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: October 16, 1990
    Assignee: Nalco Chemical Company
    Inventors: John E. Hoots, Kenneth P. Fivizzani, Barbara E. Fair
  • Stabilization of iron in aqueous systems
    Patent number: 4869828
    Abstract: The present invention is directed to a process for stabilizing iron hydr(oxide) in aqueous systems which comprises adding to an aqueous system in which the water contains or will contain soluble iron a polymer which contains pendant N-substituted amide functionality, including amide substituted with sulfoalkyl wherein the alkyl is of 1 to 3 carbon atoms, sulfophenyl, or such groups substituted further with (poly)hydroxy.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: September 26, 1989
    Assignee: Nalco Chemical Company
    Inventors: John E. Hoots, Kenneth P. Fivizzani, Roy I. Kaplan