Patents by Inventor Vladimir Djukanovic

Vladimir Djukanovic 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: 12103871
    Abstract: A method for treating water to remove a target analyte that includes adding to the water a rare earth metal salt and a coagulant, and then removing the target analyte from the water. The treatment composition can be added as a blend that includes die coagulant and the rare earth metal salt.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: October 1, 2024
    Assignee: CHEMTREAT, INC.
    Inventors: William Henderson, Vladimir Djukanovic, Nicholas Seymour
  • Publication number: 20220204369
    Abstract: A method of treating water to remove selenium and/or mercury that is dissolved in the water. The method includes adding an acid to the water to reduce the pH, adding a metal reagent to the water that is effective to reduce the selenium and/or mercury to a lower oxidation state, and then removing the reduced selenium and/or mercury from the water.
    Type: Application
    Filed: December 31, 2020
    Publication date: June 30, 2022
    Applicant: CHEMTREAT, INC.
    Inventors: Vladimir DJUKANOVIC, William HENDERSON, Nicholas SEYMOUR, Robert JEFFERS
  • Publication number: 20210238067
    Abstract: Methods for treating water containing a target anion to remove the target anion can include preparing a treatment composition solution that contains a metal treatment agent, adjusting the treatment composition solution to a first pH that is alkaline and then to a second pH that is acidic, and contacting the treatment composition solution with the water that contains the target anion.
    Type: Application
    Filed: February 3, 2020
    Publication date: August 5, 2021
    Applicant: CHEMTREAT, INC.
    Inventors: Vladimir DJUKANOVIC, Nicholas SEYMOUR, William HENDERSON, Oleh WERES
  • Patent number: 11066313
    Abstract: Methods are disclosed for treating water containing a target anion to remove the target anion. The methods can include preparing a treatment composition solution that contains a metal treatment agent, adjusting the treatment composition solution to a first pH that is alkaline and then to a second pH that is acidic, and contacting the treatment composition solution with the water that contains the target anion.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: July 20, 2021
    Assignee: CHEMTREAT, INC.
    Inventors: Vladimir Djukanovic, Nicholas Seymour, William Henderson, Oleh Weres
  • Patent number: 10752522
    Abstract: Methods for removing a target selenium entity from fluids by treating the fluid with a rare earth impregnated media containing an immobilized rare earth. The methods including obtaining a contaminated fluid comprising water and dissolved selenate; contacting the feed fluid with a rare earth impregnated media for removal of at least a portion of the selenate from the feed fluid thereby forming a treated fluid comprising less selenium than the feed fluid.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: August 25, 2020
    Assignee: CHEMTREAT, INC
    Inventors: William H Henderson, John Philip Richardson, Vladimir Djukanovic
  • Publication number: 20200156968
    Abstract: A method for treating water to remove a target analyte that includes adding to the water a rare earth metal salt and a coagulant, and then removing the target analyte from the water. The treatment composition can be added as a blend that includes die coagulant and the rare earth metal salt.
    Type: Application
    Filed: July 3, 2018
    Publication date: May 21, 2020
    Inventors: William Henderson, Vladimir Djukanovic, Nicholas Saymour
  • Publication number: 20190055140
    Abstract: Methods for removing a target selenium entity from fluids by treating the fluid with a rare earth impregnated media containing an immobilized rare earth. The methods including obtaining a contaminated fluid comprising water and dissolved selenate; contacting the feed fluid with a rare earth impregnated media for removal of at least a portion of the selenate from the feed fluid thereby forming a treated fluid comprising less selenium than the feed fluid.
    Type: Application
    Filed: August 20, 2018
    Publication date: February 21, 2019
    Applicant: CHEMTREAT, INC.
    Inventors: William H. HENDERSON, John Philip RICHARDSON, Vladimir DJUKANOVIC
  • Patent number: 9890061
    Abstract: Methods for removing a target anion entity, such as a phosphate ion, from fluids by treating the fluid with a substrate containing an immobilized rare earth, the substrate being either a first loaded substrate including a first immobilized cationic rare earth, the first loaded substrate being formed by precipitating a rare earth in a clay such that the rare earth is fixed inside a porous structure of the clay and/or fixed on the surface of the clay; or a second loaded substrate comprising a second immobilized cationic rare earth that is bonded to the second loaded substrate via a chelating ligand.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: February 13, 2018
    Assignee: CHEMTREAT, INC.
    Inventors: John Richardson, Vladimir Djukanovic, William Henderson
  • Patent number: 9499662
    Abstract: Disclosed is a method for inhibiting the formation of foam in aqueous systems by adding foam control composition including a polyoxyethylene and/or a polyoxypropylene nonionic fatty acid derivative and a quaternary ammonium surfactant.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: November 22, 2016
    Assignee: CHEMTREAT, INC.
    Inventors: John Richardson, Mark Puchovich, Vladimir Djukanovic, Karen Williams
  • Publication number: 20160096747
    Abstract: Methods for removing a target anion entity, such as a phosphate ion, from fluids by treating the fluid with a substrate containing an immobilized rare earth, the substrate being either a first loaded substrate including a first immobilized cationic rare earth, the first loaded substrate being formed by precipitating a rare earth in a clay such that the rare earth is fixed inside a porous structure of the clay and/or fixed on the surface of the clay; or a second loaded substrate comprising a second immobilized cationic rare earth that is bonded to the second loaded substrate via a chelating ligand.
    Type: Application
    Filed: October 5, 2015
    Publication date: April 7, 2016
    Inventors: John RICHARDSON, Vladimir DJUKANOVIC, William HENDERSON
  • Publication number: 20110240914
    Abstract: Disclosed is a method for inhibiting the formation of foam in aqueous systems by adding foam control composition including a polyoxethylene and/or a polyoxypropylene nonionic fatty acid derivative and a quaternary ammonium surfactant.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 6, 2011
    Inventors: John RICHARDSON, Mark Puchovich, Vladimir Djukanovic, Karen Williams