Patents by Inventor David M. Polizzotti

David M. Polizzotti 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).

  • Patent number: 5186915
    Abstract: Agglomerating agent and method for use in heap leaching of mineral bearing ores. A moderate to high molecular weight anionic polymer in combination with lime provides a highly effective agglomerating agent. The anionic polymer is preferably a copolymer of acrylamide and acrylic acid. The polymer preferably has a molecular weight of from about 1 to 8 million or higher.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: February 16, 1993
    Assignee: Betz Laboratories, Inc.
    Inventor: David M. Polizzotti
  • Patent number: 5112582
    Abstract: Agglomerating agent and method for use in heap leaching of mineral bearing ores. A moderate to high molecular weight anionic polymer in combination with lime provides a highly effective agglomerating agent. The anionic polymer is preferably a copolymer of acrylamide and acrylic acid. The polymer preferably has a molecular weight of from about 1 to 8 million or higher.
    Type: Grant
    Filed: May 11, 1990
    Date of Patent: May 12, 1992
    Assignee: Betz Laboratories, Inc.
    Inventor: David M. Polizzotti
  • Patent number: 5079036
    Abstract: A stable foam having foam bubble diameters of 0.005-0.015 inches and being comprised of from about 10-30 wt. % of a brine freeze control agent selected from the group consisting of sodium chloride, calcium chloride, magnesium chloride, potassium chloride, borax, potassium thiocyanate, potassium acetate, sodium acetate, and sodium nitrite, anionic surfactant, amphoteric surfactant, and water is applied to solid, particulate materials such as coal or mineral ores to inhibit freezing and improve handleability characteristics of the particulate materials. The foam optionally may contain additional freeze control agents such as ethylene glycol or cellulose ethers.
    Type: Grant
    Filed: July 27, 1990
    Date of Patent: January 7, 1992
    Assignee: Betz Laboratories, Inc.
    Inventors: Donald C. Roe, David M. Polizzotti
  • Patent number: 5077021
    Abstract: Agglomerating agent and method for use in heap leaching of mineral bearing ores. A moderate to high molecular weight anionic polymer either alone or in combination with cement provides a highly effective agglomerating agent. The anionic polymer is preferably a copolymer of acrylamide and acrylic acid. The polymer preferably has a molecular weight of from about 1 to 8 million or higher.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: December 31, 1991
    Assignee: Betz Laboratories, Inc.
    Inventor: David M. Polizzotti
  • Patent number: 5077022
    Abstract: Agglomerating agent and method for use in heap leaching of mineral bearing ores. A moderate to high molecular weight anionic polymer either alone or in combination with cement provides a highly effective agglomerating agent. The anionic polymer is preferably a copolymer of acrylamide and acrylic acid. The polymer preferably has a molecular weight of from about 1 to 8 million or higher.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: December 31, 1991
    Assignee: Betz Laboratories, Inc.
    Inventor: David M. Polizzotti
  • Patent number: 4929361
    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 a surfactant, preferably a nonionic surfactant to the steepwater. Particularly effective surfactants are oxyalkylated sorbitan R surfactants where R is monooleate, trioleate, monostearate, tristearate, monopalmitate and monolaurate.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: May 29, 1990
    Assignee: Betz Laboratories, Inc.
    Inventor: David M. Polizzotti
  • Patent number: 4384968
    Abstract: Method for enhancing the removal of particles from a particle-laden gas stream utilizing an electrostatic precipitator, which comprises treating the gas with morpholine or derivatives thereof. Treated particles are found to also have desirable flow characteristics. Particularly effective compositions for the purpose comprise a combination of the morpholine, or derivative thereof, with an electrostatic precipitator efficiency enhancer, and in particular an alkanolamine.
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: May 24, 1983
    Assignee: Betz Laboratories, Inc.
    Inventors: David M. Polizzotti, Joe C. Steelhammer
  • Patent number: 4294588
    Abstract: A method for passing an additive comprising morpholine across gas stream in an electrostatic precipitator to improve particle removal.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: October 13, 1981
    Assignee: Betz Laboratories, Inc.
    Inventors: David M. Polizzotti, Joe C. Steelhammer
  • Patent number: 4239504
    Abstract: A method is disclosed for improving operation of an electrostatic precipitator. By adding free base amino alcohol to a particle-laden gas being treated by the precipitator, the efficiency of particle removal is significantly enhanced.
    Type: Grant
    Filed: April 14, 1980
    Date of Patent: December 16, 1980
    Assignee: Betz Laboratories, Inc.
    Inventors: David M. Polizzotti, Joe C. Steelhammer