Patents by Inventor Ashish Dhawan

Ashish Dhawan 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: 11167257
    Abstract: Surfactants capable of releasing and/or dissolving polymers to form water-soluble or water-dispersible polymer solutions are disclosed. In addition, polymer compositions containing a water-in-oil emulsion comprising the surfactant are provided and can be used, for example, in methods of dissolving a polymer. These surfactants and polymer compositions can be used in various industries including for water clarification, papermaking, sewage and industrial water treatment, drilling mud stabilizers, and enhanced oil recovery.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: November 9, 2021
    Assignee: Ecolab USA Inc.
    Inventors: Michael L. Braden, Ashish Dhawan, Wesley L. Whipple, Pious Kurian
  • Publication number: 20210332288
    Abstract: Disclosed herein are the methods of using specific multiple charged cationic compounds, which are derived from polyamines through an aza-Michael addition with an ?, ?-unsaturated carbonyl compound, in a clay treatment composition to reduces clay swelling, clay migration, and sludge formation in a subterranean formation in oil and gas operations. The disclosed methods or compositions are found to be more effective than those methods or compositions including commonly used for reducing clay swelling, clay migration, and sludge formation.
    Type: Application
    Filed: June 30, 2021
    Publication date: October 28, 2021
    Inventors: Ashish Dhawan, Kellen Harkness, Carter M. Silvernail, Keith A. Monk
  • Patent number: 11155481
    Abstract: Described herein are the methods of using a cationic alkyl polyglycoside in a fouling control composition to reduce microbial and/biofilm growth in a water system. The described methods or compositions are found to be effective than those methods or compositions including commonly used single quaternary compounds for reducing microbial or biofilm growth in water systems.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: October 26, 2021
    Assignee: ECOLAB USA INC.
    Inventors: Ashish Dhawan, Kun Xiong, Carter M. Silvernail
  • Patent number: 11155480
    Abstract: Described herein are the methods of using a cationic alkyl polyglycoside in a corrosion control composition to reduce corrosion for metal surfaces in a water system. The described methods or compositions are found to be effective than those methods or compositions including commonly used corrosion inhibitors for water systems.
    Type: Grant
    Filed: January 28, 2020
    Date of Patent: October 26, 2021
    Assignee: Ecolab USA Inc.
    Inventors: Jeremy Moloney, Ashish Dhawan, Carter M. Silvernail
  • Patent number: 11142713
    Abstract: The present invention generally relates to nonylphenol-free alkoxylated 4-(alkyloxy)phenol/aldehyde resins and processes for making alkoxylated 4-(alkyloxy)phenol/aldehyde resins. The invention also relates to methods of breaking emulsions of oil and water comprising the dosing of an effective amount of an emulsion breaker composition into a stable emulsion to destabilize the emulsion, wherein the emulsion breaker composition comprises an alkoxylated 4-(alkyloxy)phenol/aldehyde resin.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: October 12, 2021
    Assignee: Ecolab USA Inc.
    Inventors: Omer Gul, Michael L. Braden, Ashish Dhawan
  • Publication number: 20210298300
    Abstract: Disclosed herein are the methods of using specific di-cationic or multiple charged cationic compounds, which are derived from primary amine or polyamines through an aza-Michael addition with an ?, ?-unsaturated carbonyl compound or from polyamines through both an aza-Michael addition with an ?, ?-unsaturated carbonyl compound and a ring-opening reaction with an epoxide, in a fouling control composition to reduce microbial and/biofilm growth in a water system. The disclosed methods or compositions are found to be more effective than those methods or compositions including commonly used single quaternary compounds for reducing microbial or biofilm growth in water systems.
    Type: Application
    Filed: June 14, 2021
    Publication date: September 30, 2021
    Inventors: Ashish Dhawan, Kun Xiong, Carter M. Silvernail, Zhengang Zong
  • Publication number: 20210301151
    Abstract: A method of preventing formation of rust on a metal surface is provided. The method may include applying a polyamine onto the metal surface and applying a compound of formula (I) or salt thereof onto the metal surface. The compositions and methods disclosed herein may be used to inhibit corrosion of a metal surface in contact with an aqueous system.
    Type: Application
    Filed: February 26, 2021
    Publication date: September 30, 2021
    Applicant: ECOLAB USA INC.
    Inventors: Steven R. HATCH, Jothibasu SEETHARAMAN, Ashish DHAWAN, Carter M. SILVERNAIL, Santanu BANERJEE, Pradeep CHERUKU
  • Patent number: 11104626
    Abstract: Described are methods and compositions for inhibiting polymerization of a monomer (e.g., styrene) composition using a hydroxylated quinone antipolymerant. The hydroxylated quinone antipolymerant can be used with little or no nitroxyl group containing antipolymerant yet still provide excellent antipolymerant activity in a monomer-containing composition.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: August 31, 2021
    Assignee: Ecolab USA Inc.
    Inventors: Jonathan Masere, Russell P. Watson, Ashish Dhawan
  • Patent number: 11084974
    Abstract: Methods of using specific multiple charged cationic compounds, which are derived from polyamines through an aza-Michael addition with an ?, ?-unsaturated carbonyl compound, in a clay treatment composition to reduces clay swelling, clay migration, and sludge formation in a subterranean formation in oil and gas operations are provided. The disclosed methods or compositions are found to be more effective than those methods or compositions including commonly used for reducing clay swelling, clay migration, and sludge formation.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: August 10, 2021
    Assignee: ChampionX USA Inc.
    Inventors: Ashish Dhawan, Kellen Harkness, Carter M. Silvernail, Keith A. Monk
  • Publication number: 20210238068
    Abstract: The present disclosure generally relates to compositions and uses of sulfidogenesis inhibitor compounds of Formulae 1 and 2 for preventing sulfidogenesis, i.e., the reduction reaction of a sulfur-containing compound by sulfur-utilizing prokaryotes that produce sulfide species such as hydrogen sulfide, during enhanced oil recovery processes. A method for inhibiting or decreasing microbial sulfide production by sulfur-utilizing prokaryotes includes addition of an effective amount of sulfidogenesis inhibitor compounds of Formulae 1 and 2 to the fluid that is injected into a sulfidogenic reservoir system during enhanced oil recovery. For example, the compounds can be used as sulfidogenesis inhibitors in a water injection system for use in a hydrocarbon extraction system or a hydrocarbon production system. Thus, these compositions can be effectively used as inhibitors of biogenic hydrogen sulfide generation in oilfield fluids.
    Type: Application
    Filed: January 25, 2021
    Publication date: August 5, 2021
    Inventors: Timothy James Tidwell, Alicia Dinges, Ashish Dhawan
  • Publication number: 20210230034
    Abstract: Disclosed herein are the methods of using di-cationic or di-anionic compounds, which are derived from primary amine through an aza-Michael addition with an activated olefin, in a corrosion control composition to mitigate corrosion of a surface in a water system. The disclosed methods or compositions are found to be more effective than those methods or compositions including commonly used single quaternary compounds for mitigating corrosion for a metal surface in water systems.
    Type: Application
    Filed: April 15, 2021
    Publication date: July 29, 2021
    Inventors: Ashish Dhawan, Jeremy Moloney, Carter M. Silvernail, Boyd A. Laurent
  • Patent number: 11058111
    Abstract: Disclosed herein are the methods of using specific di-cationic or multiple charged cationic compounds, which are derived from primary amine or polyamines through an aza-Michael addition with an ?,?-unsaturated carbonyl compound or from polyamines through both an aza-Michael addition with an ?,?-unsaturated carbonyl compound and a ring-opening reaction with an epoxide, in a fouling control composition to reduce microbial and/biofilm growth in a water system. The disclosed methods or compositions are found to be more effective than those methods or compositions including commonly used single quaternary compounds for reducing microbial or biofilm growth in water systems.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: July 13, 2021
    Assignee: Ecolab USA Inc.
    Inventors: Ashish Dhawan, Kun Xiong, Carter M. Silvernail, Zhengang Zong
  • Patent number: 11021383
    Abstract: Disclosed herein are the methods of using di-cationic or di-anionic compounds, which are derived from primary amine through an aza-Michael addition with an activated olefin, in a corrosion control composition to mitigate corrosion of a surface in a water system. The disclosed methods or compositions are found to be more effective than those methods or compositions including commonly used single quaternary compounds for mitigating corrosion for a metal surface in water systems.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: June 1, 2021
    Assignee: Ecolab USA Inc.
    Inventors: Ashish Dhawan, Jeremy Moloney, Carter M. Silvernail, Boyd A. Laurent
  • Publication number: 20210140110
    Abstract: Creping adhesives and processes for making and using same. In some embodiments, the creping adhesive can include a solvent, a modified polyvinyl alcohol, and a crosslinked resin. The crosslinked resin can include polyamidoamine backbones crosslinked by primary crosslinking moieties and propanediyl moieties, where the primary crosslinking moieties can be derived from a functionally symmetric crosslinker. In other embodiments, the crosslinked resin can include polyamidoamine backbones crosslinked by primary crosslinking moieties and secondary crosslinking moieties, where the primary crosslinking moieties can be derived from a first functionally symmetric crosslinker and the secondary crosslinking moieties can be derived from a second functionally symmetric crosslinker. In other embodiments, the crosslinked resin can include polyamidoamine backbones crosslinked by primary crosslinking moieties, where the primary crosslinking moieties can be derived from a functionally symmetric crosslinker.
    Type: Application
    Filed: November 6, 2020
    Publication date: May 13, 2021
    Applicant: ECOLAB USA INC.
    Inventors: Ashish Dhawan, David J. Castro, Gary S. Furman, Christopher Kaley
  • Publication number: 20210102044
    Abstract: A cationic polymer salt composition is provided that includes a reaction product derived from reaction of a polyamine or a polyalkyleneimine and a substituted alkyl trialkyl quaternary ammonium salt. Also provided are surfactant compositions. The compositions may also include carriers, such as water, methanol, ethanol, propanol, isopropanol, butanol, isobutanol, monoethyleneglycol, an ethyleneglycol monobutyl ether, and hexylene glycol.
    Type: Application
    Filed: December 15, 2020
    Publication date: April 8, 2021
    Applicant: ECOLAB USA, INC.
    Inventors: Zhengang Zong, Kun Xiong, Jeffrey R. Cramm, Xiaodong Huang, Jeremy Moloney, Ashish Dhawan
  • Publication number: 20210037818
    Abstract: Stabilized peroxycarboxylic acid compositions and the solid supported peracid stabilizers are provided. Methods of producing the solid supported peracid stabilizers are provided. The solid supported peracid stabilizers and the stable peroxycarboxylic acid compositions are particularly suitable for use in sanitizing equipment and surfaces to reduce yeasts, spores and bacteria, including those having contact with food, food products and/or components thereof, which require or benefit from infection control suitable for direct contact with such food sources.
    Type: Application
    Filed: August 7, 2020
    Publication date: February 11, 2021
    Inventors: Ashish Dhawan, Junzhong Li, David D. McSherry, Carter M. Silvernail, Chris Nagel
  • Patent number: 10899910
    Abstract: A cationic polymer salt composition is provided that includes a reaction product derived from reaction of a polyamine or a polyalkyleneimine and a substituted alkyl trialkyl quaternary ammonium salt. Also provided are surfactant compositions. The compositions may also include carriers, such as water, methanol, ethanol, propanol, isopropanol, butanol, isobutanol, monoethyleneglycol, an ethyleneglycol monobutyl ether, and hexylene glycol.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: January 26, 2021
    Assignee: ECOLAB USA INC.
    Inventors: Zhengang Zong, Kun Xiong, Jeffrey R. Cramm, Xiaodong Huang, Jeremy Moloney, Ashish Dhawan
  • Patent number: 10900128
    Abstract: The present invention generally relates to the use of aryl sulfonium salts as a corrosion inhibitor in a water injection system, a hydrocarbon extraction system, or a hydrocarbon production system. Treating oilfield injection and produced fluids with aryl sulfonium salts can significantly decrease microbially induced corrosion. Thus, these aryl sulfonium salts can be effectively used as corrosion inhibitors in oilfield fluids.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: January 26, 2021
    Assignee: ChampionX USA Inc.
    Inventors: Brett Geissler, Ashish Dhawan, Alicia Dinges, Carter Martin Silvernail
  • Publication number: 20200339880
    Abstract: Described are compounds, compositions, and methods that include a nitrogen- and oxygen-containing aromatic compound, such as an aminophenol-based compound, which can be used for inhibiting polymerization of a monomer (e.g., styrene) composition. The compound includes a tertiary amine group wherein the nitrogen is attached to carbon-containing groups, and at least one of oxygen atom separated from the nitrogen by one or more carbon atoms. The antipolymerant can provide excellent antipolymerant activity in a monomer-containing composition.
    Type: Application
    Filed: April 28, 2020
    Publication date: October 29, 2020
    Inventors: Jonathan Masere, Ashish Dhawan
  • Publication number: 20200339503
    Abstract: Described are compounds, compositions, and methods that include oxygenated aromatic amines, such as an aminophenol-, phenyl-p-phenylenediamine-, and diaminobenzene-based compound useful as antioxidants. The oxygenated aromatic amine includes a secondary and/or tertiary amine group having a nitrogen that is attached to one or two carbon-containing group(s), the carbon-containing group(s) having a hydroxyl and/or ether group separated from the nitrogen by one or more carbon atoms.
    Type: Application
    Filed: April 28, 2020
    Publication date: October 29, 2020
    Inventors: Ashish Dhawan, Abuzar Syed, Janelle Pennington