Patents by Inventor Sathanjheri A. Ravishankar

Sathanjheri A. Ravishankar 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).

  • Electrostatic modification reagent and process for enhancing electrostatic separation in the beneficiation of ores
    Patent number: 10245596
    Abstract: An electrostatic modification reagent and a process for beneficiating a mineral substrate by electrostatic separation as described herein. The electrostatic modification reagent may be used in an electric separation process for separating components from a mineral ore or sand.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: April 2, 2019
    Assignee: Cytec Technology Corp.
    Inventors: Sathanjheri A. Ravishankar, Harsha Kolla, Bing Wang
  • ELECTROSTATIC MODIFICATION REAGENT AND PROCESS FOR ENHANCING ELECTROSTATIC SEPARATION IN THE BENEFICIATION OF ORES
    Publication number: 20160310963
    Abstract: An electrostatic modification reagent and a process for beneficiating a mineral substrate by electrostatic separation as described herein. The electrostatic modification reagent may be used in an electric separation process for separating components from a mineral ore or sand.
    Type: Application
    Filed: July 1, 2016
    Publication date: October 27, 2016
    Applicant: Cytec Technology Corp.
    Inventors: Sathanjheri A. Ravishankar, Harsha Kolla, Bing Wang
  • Process for enhancing electrostatic separation in the beneficiation of ores
    Patent number: 9403173
    Abstract: An electrostatic modification reagent as described herein. The electrostatic modification reagent may be used in an electric separation process for separating components from a mineral ore or sand.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: August 2, 2016
    Assignee: CYTEC TECHNOLOGY CORP.
    Inventors: Sathanjheri A. Ravishankar, Harsha Kolla, Bing Wang
  • Process and reagents for the inhibition or reduction of scale formation during phosphoric acid production
    Patent number: 9242863
    Abstract: Processes and reagents for inhibiting or eliminating scale formation during wet-process phosphoric acid production are provided and include adding to a wet-process phosphoric acid production stream a scale inhibiting amount of a reagent having an aliphatic or aromatic compound containing at least two hydroxy groups, and at least one amine.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: January 26, 2016
    Assignee: CYTEC TECHNOLOGY CORP.
    Inventors: Sathanjheri A. Ravishankar, Bing Wang
  • Preventing or reducing scale in wet-process phosphoric acid production
    Patent number: 9028787
    Abstract: Methods for preventing or reducing the formation of scale in a wet-process phosphoric acid production process by intermixing a water-soluble functional organic reagent with a phosphoric acid at one or more step of the phosphoric acid production process in an amount sufficient to prevent or reduce at least one species of scale are provided.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: May 12, 2015
    Assignee: Cytec Technology Corp.
    Inventors: Sathanjheri A. Ravishankar, Bing Wang
  • Preventing or reducing scale in wet-process phosphoric acid production
    Patent number: 8900539
    Abstract: Methods for preventing or reducing the formation of scale in a wet-process phosphoric acid production process by intermixing a scale inhibiting reagent at one or more step of the phosphoric acid production process in an amount sufficient to prevent or reduce scale are provided.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: December 2, 2014
    Assignee: Cytec Technology Corp.
    Inventors: Sathanjheri A. Ravishankar, Bing Wang
  • Process and magnetic reagent for the removal of impurities from minerals
    Patent number: 8827079
    Abstract: A magnetic reagent contains magnetic microparticles and a compound of the formula (I) as defined herein. The magnetic reagent may be used in a magnetic separation process for the removal of impurities from mineral substrates.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: September 9, 2014
    Assignee: Cytec Technology Corp.
    Inventors: Sathanjheri A. Ravishankar, Abdul K. Gorken
  • PREVENTING OR REDUCING SCALE IN WET-PROCESS PHOSPHORIC ACID PRODUCTION
    Publication number: 20120244058
    Abstract: Methods for preventing or reducing the formation of scale in a wet-process phosphoric acid production process by intermixing a scale inhibiting reagent at one or more step of the phosphoric acid production process in an amount sufficient to prevent or reduce scale are provided.
    Type: Application
    Filed: March 22, 2011
    Publication date: September 27, 2012
    Applicant: CYTEC TECHNOLOGY CORP.
    Inventors: Sathanjheri A. RAVISHANKAR, Bing WANG
  • PROCESS AND MAGNETIC REAGENT FOR THE REMOVAL OF IMPURITIES FROM MINERALS
    Publication number: 20120001115
    Abstract: A magnetic reagent contains magnetic microparticles and a compound of the formula (I) as defined herein. The magnetic reagent may be used in a magnetic separation process for the removal of impurities from mineral substrates.
    Type: Application
    Filed: September 8, 2011
    Publication date: January 5, 2012
    Applicant: CYTEC TECHNOLOGY CORP.
    Inventors: Sathanjheri A. RAVISHANKAR, Abdul K. GORKEN
  • Process and magnetic reagent for the removal of impurities from minerals
    Patent number: 8033398
    Abstract: A magnetic reagent contains magnetic microparticles and a compound of the formula (I) as defined herein. The magnetic reagent may be used in a magnetic separation process for the removal of impurities from mineral substrates.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: October 11, 2011
    Assignee: Cytec Technology Corp.
    Inventors: Sathanjheri A. Ravishankar, Abdul K. Gorken
  • PREVENTING OR REDUCING SCALE IN WET-PROCESS PHOSPHORIC ACID PRODUCTION
    Publication number: 20110076219
    Abstract: Methods for preventing or reducing the formation of scale in a wet-process phosphoric acid production process by intermixing a water-soluble functional organic reagent with a phosphoric acid at one or more step of the phosphoric acid production process in an amount sufficient to prevent or reduce at least one species of scale are provided.
    Type: Application
    Filed: September 23, 2010
    Publication date: March 31, 2011
    Applicant: CYTEC TECHNOLOGY CORP.
    Inventors: Sathanjheri A. RAVISHANKAR, Bing WANG
  • Process and Reagents for the Inhibition or Reduction of Scale Formation During Phosphoric Acid Production
    Publication number: 20110076218
    Abstract: Processes and reagents for inhibiting or eliminating scale formation during wet-process phosphoric acid production are provided and include adding to a wet-process phosphoric acid production stream a scale inhibiting amount of a reagent having an aliphatic or aromatic compound containing at least two hydroxy groups, and at least one amine.
    Type: Application
    Filed: September 23, 2010
    Publication date: March 31, 2011
    Applicant: CYTEC TECHNOLOGY CORP.
    Inventors: Sathanjheri A. RAVISHANKAR, Bing WANG
  • PROCESS FOR ENHANCING ELECTROSTATIC SEPARATION IN THE BENEFICIATION OF ORES
    Publication number: 20100108573
    Abstract: An electrostatic modification reagent as described herein. The electrostatic modification reagent may be used in an electric separation process for separating components from a mineral ore or sand.
    Type: Application
    Filed: October 21, 2009
    Publication date: May 6, 2010
    Inventors: Sathanjheri A. Ravishankar, Harsha Kolla, Bing Wang
  • PROCESS FOR THE REMOVAL OF IMPURITIES FROM CARBONATE MINERALS
    Publication number: 20080164140
    Abstract: A process for the beneficiation of carbonate mineral substrates by magnetic separation is defined herein wherein a phosphorus or nitrogen containing organic compound or reagent and a plurality of magnetic particles are intermixed with a carbonate containing mineral substrate, a magnetic field is applied to the mixture and a value mineral is thereby separated from a non-value mineral.
    Type: Application
    Filed: January 3, 2008
    Publication date: July 10, 2008
    Inventors: Sathanjheri A. Ravishankar, Josanlet C. Villegas, Bing Wang
  • Kaolin clay glossing pigment and preparation thereof
    Patent number: 6585822
    Abstract: Novel nanosized kaolin clay particles are prepared by agitating a fine particle size fraction of kaolin clay in a Netzsch mill until the particle size is reduced, aspect ratio is decreased and surface area is increased. The ultrafine kaolin particles are especially useful as a pigment to provide high surface gloss to ink jet printing papers.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: July 1, 2003
    Assignee: Engelhard Corporation
    Inventors: Richard R. Berube, Michael G. Londo, Sathanjheri A. Ravishankar
  • Novel kaolin clay glossing pigment and preparation thereof
    Publication number: 20020129741
    Abstract: Novel nanosized kaolin clay particles are prepared by agitating a fine particle size fraction of kaolin clay in a Netzsch mill until the particle size is reduced, aspect ratio is decreased and surface area is increased. The ultrafine kaolin particles are especially useful as a pigment to provide high surface gloss to ink jet printing papers.
    Type: Application
    Filed: January 5, 2001
    Publication date: September 19, 2002
    Inventors: Richard R. Berube, Michael G. Londo, Sathanjheri A. Ravishankar
  • Composite aggregate pigments for the coating industry
    Patent number: 5755870
    Abstract: This invention discloses a process of making composite aggregate pigments (CAPs) having superior optical and dispersion characteristics. These pigments are produced by aggregating titanium dioxide and calcined clay with zirconium hydroxy complex chemicals in a slurry in the pH range of 6.0-10.5. Superior optical properties are obtained by heat treating the pigments after removal from the slurry. Multi-faceted pigments are obtained by including a small amount of a rod-shaped pigment, such as wollastonite, in the composite pigment.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: May 26, 1998
    Assignee: Dry Branch Kaolin Company
    Inventor: Sathanjheri A. Ravishankar
  • Way to synthesize structured composite premium pigments
    Patent number: 5690728
    Abstract: A structured composite pigment composed of TiO.sub.2, calcined clay and polyaluminum chloride (PAC). A novel process is disclosed for producing an aggregated composite premium pigment having superior optical, physical and dispersion characteristics for papermaking applications. The aggregated pigment is produced by chemically aggregating a mixture containing TiO.sub.2 and calcined clay with polyaluminum chloride of a basicity of 10-85% in alkaline conditions of pH 8.5-10.5.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: November 25, 1997
    Assignee: Nord Kaolin Company
    Inventor: Sathanjheri A. Ravishankar