Patents by Inventor Devarayasamudram Ramachandran Nagaraj

Devarayasamudram Ramachandran Nagaraj 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: 11007538
    Abstract: Methods of enhancing recovery of value sulfide and/or precious metal-bearing minerals from an ore containing such minerals as well as Mg-silicate, slime forming minerals, and/or clay by adding a froth phase modifier agent to the ore, and subjecting the ore to a froth flotation process performed under acidic conditions, are provided herein.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: May 18, 2021
    Assignee: Cytec Technology Corp.
    Inventors: Devarayasamudram Ramachandran Nagaraj, Tarun Bhambhani, Mukund Vasudevan, Puspendu Deo, Haunn-Lin Tony Chen
  • Patent number: 10710099
    Abstract: Compositions including blends of one or more acrylamide/allyl thiourea polymer as a first depressant, and one or more carboxyalkyl dithiocarbamate compound as a second depressant, and their use as depressants in the beneficiation of sulfide minerals from ores and/or concentrates are disclosed herein, along with methods for selectively separating value sulfide minerals from non-value sulfide minerals in a froth flotation process for the recovery of such value minerals.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: July 14, 2020
    Assignee: Cytec Industries Inc.
    Inventors: Mikael Brasse, Esau Arinaitwe, Devarayasamudram Ramachandran Nagaraj
  • Publication number: 20190336984
    Abstract: Compositions including blends of one or more acrylamide/allyl thiourea polymer as a first depressant, and one or more carboxyalkyl dithiocarbamate compound as a second depressant, and their use as depressants in the beneficiation of sulfide minerals from ores and/or concentrates are disclosed herein, along with methods for selectively separating value sulfide minerals from non-value sulfide minerals in a froth flotation process for the recovery of such value minerals.
    Type: Application
    Filed: July 16, 2019
    Publication date: November 7, 2019
    Applicant: Cytec Industries Inc.
    Inventors: Mikael Brasse, Esau Arinaitwe, Devarayasamudram Ramachandran Nagaraj
  • Patent number: 10369577
    Abstract: Compositions including blends of one or more acrylamide/allyl thiourea polymer as a first depressant, and one or more carboxyalkyl dithiocarbamate compound as a second depressant, and their use as depressants in the beneficiation of sulfide minerals from ores and/or concentrates are disclosed herein, along with methods for selectively separating value sulfide minerals from non-value sulfide minerals in a froth flotation process for the recovery of such value minerals.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: August 6, 2019
    Assignee: Cytec Industries Inc.
    Inventors: Mikael Brasse, Esau Arinaitwe, Devarayasamudram Ramachandran Nagaraj
  • Patent number: 10130956
    Abstract: Methods of enhancing recovery of value sulfide and/or precious-metal minerals from an ore containing said minerals and a Mg-silicate, slime forming mineral, and/or clay, and which is subjected to a froth flotation process, by adding to one or more stage of the froth flotation process a froth phase modifier having a polymer containing one or more functional groups, and optionally a monovalent ion modifier enhancing agent, thereby enhancing recovery of a value sulfide mineral and/or a precious metal-bearing mineral.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: November 20, 2018
    Assignee: Cytec Technology Corp.
    Inventors: Devarayasamudram Ramachandran Nagaraj, Tarun Bhambhani, Mukund Vasudevan, Puspendu Deo, Haunn-Lin Tony Chen
  • Publication number: 20180230061
    Abstract: Agglomerated products formed from particulate materials and binder formulations having low molecular weight polymers (of 500 g/mol to 50,000 g/mol) in an aqueous or emulsion form, or having a blend of low molecular weight aqueous polymer and high molecular weight (of 500,000 g/mol to 50,000,000 g/mol) emulsion polymers, wherein the polymers are formed from water soluble ethylenically unsaturated monomers, or monomer blends, chosen from one or more of acrylic acid, acrylamide, maleic acid, allyl sulfonate, silanated and/or hydroxamated acrylamide, or 2-acrylamido-2-methylpropane sulfonic acid (AMPS), are disclosed herein as well as processes for agglomerating a particulate materials, and use of the binding agents for forming same.
    Type: Application
    Filed: February 9, 2018
    Publication date: August 16, 2018
    Inventors: Howard HASELHUHN, Devarayasamudram Ramachandran NAGARAJ, Ravi R. HIREMATH, Xin LI
  • Publication number: 20180099293
    Abstract: Compositions including blends of one or more acrylamide/allyl thiourea polymer as a first depressant, and one or more carboxyalkyl dithiocarbamate compound as a second depressant, and their use as depressants in the beneficiation of sulfide minerals from ores and/or concentrates are disclosed herein, along with methods for selectively separating value sulfide minerals from non-value sulfide minerals in a froth flotation process for the recovery of such value minerals.
    Type: Application
    Filed: October 6, 2017
    Publication date: April 12, 2018
    Inventors: Mikael Brasse, Esau Arinaitwe, Devarayasamudram Ramachandran Nagaraj
  • Publication number: 20160271624
    Abstract: Methods of enhancing recovery of value sulfide or precious minerals from an ore containing Mg-silicate, slime forming minerals, and/or clay by subjecting the ore to a flotation process performed under acidic conditions, in conjunction with the addition of a froth phase modifier agent to the ore, are provided herein.
    Type: Application
    Filed: May 26, 2016
    Publication date: September 22, 2016
    Applicant: Cytec Technology Corp.
    Inventors: Devarayasamudram Ramachandran NAGARAJ, Tarun BHAMBHANI, Mukund VASUDEVAN, Puspendu DEO, Haunn-Lin Tony CHEN
  • Patent number: 9302274
    Abstract: Formulations for value mineral collector compositions composed of at least one first collector selected from an organic ammonium salt of an organic sulfur-containing acid; and at least one second collector selected from neutral collectors and/or organic ammonium salts of an organic sulfur-containing acids, such that the second collector is different from said first collector, are provided herein, along with methods for making and using same.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: April 5, 2016
    Assignee: CYTEC TECHNOLOGY CORP.
    Inventors: Devarayasamudram Ramachandran Nagaraj, Peter Riccio, Tarun Bhambhani, Alan S. Rothenberg, Carmina Quintanar, Bing Wang
  • Patent number: 9302273
    Abstract: Froth flotation processes that include adding a beneficiating amount of a value mineral collector composed of an organic ammonium salt of a sulfur-containing acid to at least one stage of a froth flotation process to recover value minerals from mineral ore bodies are disclosed herein.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: April 5, 2016
    Assignee: CYTEC TECHNOLOGY CORP.
    Inventors: Devarayasamudram Ramachandran Nagaraj, Peter Riccio, Tarun Bhambhani, Alan S. Rothenberg, Carmina Quintanar, Bing Wang
  • Patent number: 9302272
    Abstract: Froth flotation processes that include adding a beneficiating amount of a value mineral collector composed of an organic ammonium salt of a sulfur-containing acid to at least one stage of a froth flotation process to recover value minerals from mineral ore bodies are disclosed herein.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: April 5, 2016
    Assignee: CYTEC TECHNOLOGY CORP.
    Inventors: Devarayasamudram Ramachandran Nagaraj, Peter Riccio, Tarun Bhambhani, Alan S. Rothenberg, Carmina Quintanar, Bing Wang
  • Publication number: 20140314641
    Abstract: Methods of enhancing recovery of value sulfide and/or precious-metal minerals from an ore containing said minerals and a Mg-silicate, slime forming mineral, and/or clay, and which is subjected to a froth flotation process, by adding to one or more stage of the froth flotation process a froth phase modifier having a polymer containing one or more functional groups, and optionally a monovalent ion modifier enhancing agent, thereby enhancing recovery of a value sulfide mineral and/or a precious metal-bearing mineral.
    Type: Application
    Filed: April 18, 2014
    Publication date: October 23, 2014
    Applicant: CYTEC TECHNOLOGY CORP.
    Inventors: Devarayasamudram Ramachandran NAGARAJ, Tarun BHAMBHANI, Mukund VASUDEVAN, Puspendu DEO, Haunn-Lin Tony CHEN
  • Patent number: 8720694
    Abstract: Methods of enhancing recovery of value sulfide or precious minerals from an ore containing Mg-silicate, slime forming minerals, and/or clay by crushing the ore, grinding the ore, and subjecting the ground ore to a flotation process, in conjunction with the addition of at least one monovalent ion modifier enhancing agent and/or froth phase modifier agent to the ore, are provided herein.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: May 13, 2014
    Assignee: Cytec Technology Corp.
    Inventors: Devarayasamudram Ramachandran Nagaraj, Tarun Bhambhani, Mukund Vasudevan, Puspendu Deo, Haunn-Lin Tony Chen
  • Publication number: 20100021370
    Abstract: Methods of enhancing recovery of value sulfide or precious minerals from an ore containing Mg-silicate, slime forming minerals, and/or clay by crushing the ore, grinding the ore, and subjecting the ground ore to a flotation process, in conjunction with the addition of at least one monovalent ion modifier enhancing agent and/or froth phase modifier agent to the ore, are provided herein.
    Type: Application
    Filed: July 16, 2009
    Publication date: January 28, 2010
    Inventors: Devarayasamudram Ramachandran Nagaraj, Tarun Bhambhani, Mukund Vasudevan, Puspendu Deo, Haunn-Lin Tony Chen