Patents by Inventor Suresh R. Sriram
Suresh R. Sriram 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).
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Patent number: 11708485Abstract: Described herein are treated polymers comprising a polyacrylamide homopolymer or a copolymer thereof having at least 30 mol % acrylamide residue content and a weight average molecular weight in the range of 1×105 g/mol to 1×108 g/mol, and 0.1 wt % to 10 wt % of a C1-C6 alkyl ricinoleate based on the weight of the mixture of polymer and alkyl ricinoleate. The polymers are in powder form and include less than about 30 wt % water based on the powder weight. The treated polymer powders dissolve rapidly in water and develop very little or even no insoluble gel upon diluting with water, even when the water is produced water or connate. The treated polymer solutions are useful for in-the-field rapid dilution for applications such as papermaking, flocculation, beneficiation, wastewater treatment, and enhanced oil recovery.Type: GrantFiled: August 4, 2020Date of Patent: July 25, 2023Assignee: Ecolab USA Inc.Inventors: Suresh R. Sriram, Ramasubramanyam Nagarajan
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Publication number: 20230220290Abstract: Lubricity additives for hydrocarbon fuels are provided according to formula I: wherein n is 1 or 0; each Q is independently selected from oxygen and sulfur; each R is independently selected from C8-C60 alkenyl groups which are substituted or unsubstituted; and L is a linking group comprising 0-20 carbons which may be substituted or unsubstituted and may optionally comprise catenary heteroatoms. Fuel mixtures comprising a hydrocarbon fuel; and a lubricity additive according to the present disclosure are also provided. Methods of making lubricity additives comprise reacting an alkenyl succinic anhydrides (ASA's) with certain bisamides or bisthioamides.Type: ApplicationFiled: March 14, 2023Publication date: July 13, 2023Inventors: Suresh R. Sriram, Nestor U. Soriano, JR., Karina Eureste
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Patent number: 11629304Abstract: Lubricity additives for hydrocarbon fuels are provided according to formula I: wherein n is 1 or 0; each Q is independently selected from oxygen and sulfur; each R is independently selected from C8-C60 alkenyl groups which are substituted or unsubstituted; and L is a linking group comprising 0-20 carbons which may be substituted or unsubstituted and may optionally comprise catenary heteroatoms. Fuel mixtures comprising a hydrocarbon fuel; and a lubricity additive according to the present disclosure are also provided. Methods of making lubricity additives comprise reacting an alkenyl succinic anhydrides (ASA's) with certain bisamides or bisthioamides.Type: GrantFiled: November 12, 2021Date of Patent: April 18, 2023Assignee: ECOLAB USA INC.Inventors: Suresh R. Sriram, Nestor U. Soriano, Jr., Karina Eureste
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Publication number: 20230053321Abstract: 2-substituted benzimidazoles and methods of preparing the same are disclosed. The compositions may include a compound or salt thereof, a strong acid, and a carboxylic acid. The compositions may exclude a polar aprotic solvent. The compositions may be used to inhibit corrosion of a metal surface in contact with an aqueous system, and provide enhanced protection against corrosion of metals in the aqueous system.Type: ApplicationFiled: August 1, 2022Publication date: February 16, 2023Applicant: ECOLAB USA INC.Inventors: Pradeep CHERUKU, Patricia GILLENWATER, Nicolas LEFLEMME, Alexander MANTIS, James Joseph MICHELS, Suresh R. SRIRAM
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Publication number: 20220287161Abstract: Described are graphite-containing electrodes comprising zirconium-based coatings, which slow the loss of material from the electrodes when used at high temperatures, for example when used in arc furnaces between 1000 and 2000° C. The zirconium-based coating may be disposed on a graphite-containing surface of the electrode, or on a pre-coating disposed on a surface of the electrode. The zirconium-based coatings include one or more zirconium compounds such as zirconia. Also described are compositions and methods to coat graphite-containing electrodes with zirconium-based coating compositions.Type: ApplicationFiled: March 4, 2022Publication date: September 8, 2022Inventor: Suresh R. Sriram
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Patent number: 11359135Abstract: Water-in-oil lattices of water soluble polymers and methods of using the same are presented. The lattices are made, used, and stored having about 15 wt % to 70 wt % polymer solids and further include one or more alkyl ricinoleates. We have found that C1-C6 alkyl ricinoleates added to such lattices facilitate rapid and complete dilution to less than or equal to 1 wt % polymer solids in a continuous water phase. In particular under conditions wherein the water source used to invert the latex is provided at low temperature (?10° C. to 10° C.), or includes a high level of total dissolved solids, or is both low temperature and high total dissolved solids.Type: GrantFiled: August 4, 2020Date of Patent: June 14, 2022Assignee: Ecolab USA Inc.Inventors: Suresh R. Sriram, Ramasubramanyam Nagarajan
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Publication number: 20220154089Abstract: Lubricity additives for hydrocarbon fuels are provided according to formula I: wherein n is 1 or 0; each Q is independently selected from oxygen and sulfur; each R is independently selected from C8-C60 alkenyl groups which are substituted or unsubstituted; and L is a linking group comprising 0-20 carbons which may be substituted or unsubstituted and may optionally comprise catenary heteroatoms. Fuel mixtures comprising a hydrocarbon fuel; and a lubricity additive according to the present disclosure are also provided. Methods of making lubricity additives comprise reacting an alkenyl succinic anhydrides (ASA's) with certain bisamides or bisthioamides.Type: ApplicationFiled: November 12, 2021Publication date: May 19, 2022Inventors: Suresh R. Sriram, Nestor U. Soriano, JR., Karina Eureste
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Patent number: 11053203Abstract: 2-substituted benzimidazoles and methods of preparing the same are disclosed. The compositions may include a compound or salt thereof, an acid, and a polar aprotic solvent. The compositions may be used to inhibit corrosion of a metal surface in contact with an aqueous system, and provide enhanced protection against corrosion of metals in the aqueous system.Type: GrantFiled: November 9, 2018Date of Patent: July 6, 2021Assignee: ECOLAB USA INC.Inventors: Pradeep Cheruku, Suresh R. Sriram, James Joseph Michels
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Publication number: 20210040377Abstract: Water-in-oil lattices of water soluble polymers and methods of using the same are presented. The lattices are made, used, and stored having about 15 wt % to 70 wt % polymer solids and further include one or more alkyl ricinoleates. We have found that C1-C6 alkyl ricinoleates added to such lattices facilitate rapid and complete dilution to less than or equal to 1 wt % polymer solids in a continuous water phase. In particular under conditions wherein the water source used to invert the latex is provided at low temperature (?10° C. to 10° C.), or includes a high level of total dissolved solids, or is both low temperature and high total dissolved solids.Type: ApplicationFiled: August 4, 2020Publication date: February 11, 2021Inventors: Suresh R. Sriram, Ramasubramanyam Nagarajan
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Publication number: 20210040306Abstract: Described herein are treated polymers comprising a polyacrylamide homopolymer or a copolymer thereof having at least 30 mol % acrylamide residue content and a weight average molecular weight in the range of 1×105 g/mol to 1×108 g/mol, and 0.1 wt % to 10 wt % of a C1-C6 alkyl ricinoleate based on the weight of the mixture of polymer and alkyl ricinoleate. The polymers are in powder form and include less than about 30 wt % water based on the powder weight. The treated polymer powders dissolve rapidly in water and develop very little or even no insoluble gel upon diluting with water, even when the water is produced water or connate. The treated polymer solutions are useful for in-the-field rapid dilution for applications such as papermaking, flocculation, beneficiation, wastewater treatment, and enhanced oil recovery.Type: ApplicationFiled: August 4, 2020Publication date: February 11, 2021Inventors: Suresh R. Sriram, Ramasubramanyam Nagarajan
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Publication number: 20200338571Abstract: Improved sparge compositions for reverse froth flotation separation and uses thereof, and improved methods of reverse froth flotation are described. Described are sparge compositions comprising collectors and beneficiating agents, the collectors comprising sulfonated fatty acids and/or salts thereof, and the beneficiating agents comprising a hydroxy fatty acid composition. The sparge compositions are suitably used in the reverse froth flotation to separate phosphate beneficiary from ores comprising phosphate and dolomite, calcite, silicate, and/or other gangues. The disclosed compositions and methods exhibit improved separation of phosphate from such ores.Type: ApplicationFiled: July 6, 2020Publication date: October 29, 2020Inventors: Jianjun Liu, Suresh R. Sriram, Kevin O'Brien, Daniel N.T. Hay
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Patent number: 10774183Abstract: A process for the manufacturing of a poly (arylether sulfone) polymer comprising reacting in a solvent mixture comprising a polar aprotic solvent and in the presence of an alkali metal carbonate, a monomer mixture which contains: at least one 1,4:3,6-dianhydrohexitol selected from the group consisting of isosorbide (1), isomannide (2) and isoidide (3); at least one dihaloaryl compound of formula (S): X—Ar1—SO2—[Ar2—(T-Ar3)n—SO2]m—Ar4—X wherein n and m, equal to or different from each other, are independently zero or an integer of 1 to 5; X and X?, equal to or different from each other, are halogens selected from F, Cl, Br, I; each of Ar1, Ar2, Ar3 and Ar4 equal to or different from each other and at each occurrence, is an aromatic moiety, T is a bond or a divalent group optionally comprising one or more than one heteroatom; optionally, at least one dihydroxyl compound different from the diol (AA); optionally, at least one dihaloaryl compound different from the dihalo (BB); and optionally, at least one hydroxyType: GrantFiled: April 4, 2019Date of Patent: September 15, 2020Assignee: SOLVAY SPECIALTY POLYMERS USA, LLC.Inventors: Narmandakh Taylor, Charles R. Hoppin, Ahmed Khan, Henry Bradley, Suresh R. Sriram
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Patent number: 10737281Abstract: Improved sparge compositions for reverse froth flotation separation and uses thereof, and improved methods of reverse froth flotation are described. Described are sparge compositions comprising collectors and beneficiating agents, the collectors comprising sulfonated fatty acids and/or salts thereof, and the beneficiating agents comprising a hydroxy fatty acid composition. The sparge compositions are suitably used in the reverse froth flotation to separate phosphate beneficiary from ores comprising phosphate and dolomite, calcite, silicate, and/or other gangues. The disclosed compositions and methods exhibit improved separation of phosphate from such ores.Type: GrantFiled: May 25, 2018Date of Patent: August 11, 2020Assignee: Ecolab USA Inc.Inventors: Jianjun Liu, Suresh R. Sriram, Kevin O'Brien, Daniel N.T. Hay
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Publication number: 20190233591Abstract: A process for the manufacturing of a poly(arylether sulfone) polymer comprising reacting in a solvent mixture comprising a polar aprotic solvent and in the presence of an alkali metal carbonate, a monomer mixture which contains: at least one 1,4:3,6-dianhydrohexitol selected from the group consisting of isosorbide (1), isomannide (2) and isoidide (3); at least one dihaloaryl compound of formula (S): X—Ar1—SO2—[Ar2—(T-Ar3)n—SO2]m—Ar4—X wherein n and m, equal to or different from each other, are independently zero or an integer of 1 to 5; X and X?, equal to or different from each other, are halogens selected from F, Cl, Br, I; each of Ar1, Ar2, Ar3 and Ar4 equal to or different from each other and at each occurrence, is an aromatic moiety, T is a bond or a divalent group optionally comprising one or more than one heteroatom; optionally, at least one dihydroxyl compound different from the diol (AA); optionally, at least one dihaloaryl compound different from the dihalo (BB); and optionally, at least one hydroxylType: ApplicationFiled: April 4, 2019Publication date: August 1, 2019Applicant: SOLVAY SPECIALTY POLYMERS USA, LLC.Inventors: Narmandakh TAYLOR, Charles R. HOPPIN, Ahmed KHAN, Henry BRADLEY, Suresh R. SRIRAM
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Patent number: 10301432Abstract: A process for the manufacturing of a poly(arylether sulfone)polymer comprising reacting in a solvent mixture comprising a polar aprotic solvent and in the presence of an alkali metal carbonate, a monomer mixture which contains: at least one 1,4:3,6-dianhydrohexitol selected from the group consisting of isosorbide (1), isomannide (2) and isoidide (3); at least one dihaloaryl compound of formula (S): X—Ar1—SO2—[Ar2—(T-Ar3)n—SO2]m—Ar4—X??formula (S) wherein n and m, equal to or different from each other, are independently zero or an integer of 1 to 5; X and X?, equal to or different from each other, are halogens selected from F, Cl, Br, I; each of Ar1, Ar2, Ar3 and Ar4 equal to or different from each other and at each occurrence, is an aromatic moiety, T is a bond or a divalent group optionally comprising one or more than one heteroatom; optionally, at least one dihydroxyl compound different from the diol (AA); optionally, at least one dihaloaryl compound different from the dihalo (BB); and optionally, at leasType: GrantFiled: November 8, 2013Date of Patent: May 28, 2019Assignee: SOLVAY SPECIALTY POLYMERS USA, LLC.Inventors: Narmandakh Taylor, Charles R. Hoppin, Ahmed Khan, Henry Bradley, Suresh R. Sriram
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Publication number: 20190144395Abstract: 2-substituted benzimidazoles and methods of preparing the same are disclosed. The compositions may include a compound or salt thereof, an acid, and a polar aprotic solvent. The compositions may be used to inhibit corrosion of a metal surface in contact with an aqueous system, and provide enhanced protection against corrosion of metals in the aqueous system.Type: ApplicationFiled: November 9, 2018Publication date: May 16, 2019Applicant: Ecolab USA Inc.Inventors: Pradeep Cheruku, Suresh R. Sriram, James Joseph Michels
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Publication number: 20180345297Abstract: Improved sparge compositions for reverse froth flotation separation and uses thereof, and improved methods of reverse froth flotation are described. Described are sparge compositions comprising collectors and beneficiating agents, the collectors comprising sulfonated fatty acids and/or salts thereof, and the beneficiating agents comprising a hydroxy fatty acid composition. The sparge compositions are suitably used in the reverse froth flotation to separate phosphate beneficiary from ores comprising phosphate and dolomite, calcite, silicate, and/or other gangues. The disclosed compositions and methods exhibit improved separation of phosphate from such ores.Type: ApplicationFiled: May 25, 2018Publication date: December 6, 2018Inventors: Jianjun Liu, Suresh R. Sriram, Kevin O'Brien, Daniel N.T. Hay
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Publication number: 20170368762Abstract: A laser-weldable composition and method using the same, said composition comprising at least one amorphous polyamide made from the polycondensation of at least an acyclic aliphatic diamine comprising at least 10 carbon atoms and/or at least an acyclic aliphatic diacid comprising at least 10 carbon atoms, and at least a phthalic acid selected from the group consisting of terephthalic acid and isophthalic acid, at least one flat glass fiber; and at least one organic dye which absorbs radiation at a wavelength from 800 to 1400 nm.Type: ApplicationFiled: December 11, 2015Publication date: December 28, 2017Applicant: SOLVAY SPECIALTY POLYMERS USA, LLCInventors: Keshav GAUTAM, Linda M. NORFOLK, Suresh R. SRIRAM, Jiqiang XIA
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Publication number: 20160303828Abstract: A mobile electronic part consisting of: (i) a pre-treated shaped metal part wherein the metal is selected from a group consisting of magnesium, aluminum and alloys of these metals, and (ii) an overmolded composition layer [layer (C), herein after] bonded onto said pre-treated shaped metal part wherein said composition comprises at least one poly(ethersulfone) polymer [(PESU) polymer herein after].Type: ApplicationFiled: December 8, 2014Publication date: October 20, 2016Inventors: Suresh R. SRIRAM, Gregory C. PLITHIDES
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Publication number: 20160114563Abstract: A mobile electronic part comprising: (i) a shaped metal part, at least part of the surface thereof being coated with at least one polymer layer (L), wherein the metal is selected from a group consisting of magnesium, aluminum and alloys of these metals, and wherein said polymer layer (L) comprises at least one polymer selected from an aromatic polyamide-imide polymer [(PAI) polymer, herein after] or a poly(ethersulfone) polymer [(PESU) polymer herein after], and (ii) a thermoplastic resin composition layer [layer (T), herein after] fixed to the at least one polymer layer (L) of said shaped metal part wherein said composition comprises at least one thermoplastic polymer [polymer (T), herein after].Type: ApplicationFiled: June 10, 2014Publication date: April 28, 2016Inventors: Geoffrey Scott Underwood, Gregory C. Plithides, Mohammad Jamal El-Hibri, Hong Chen, Sebastien Petillon, Philippe Brasseur, Suresh R. Sriram