Patents by Inventor Viswanath Mahadevan
Viswanath Mahadevan 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: 11608295Abstract: A dispersant composition includes a) at least one polymer constituted of monomers having naphthalene ring and/or melamine; b). at least one polymer having carboxylic acid and/or phosphoric acid group and/or any group that is hydrolyzed into carboxylic or phosphoric; and c). at least one polymer having a structure of Formula I: R1 is hydrogen or alky group having carbon number not less than 1, cycloalkyl or cycloalkenyl group having carbon number not less than 3, alkenyl group having carbon number not less than 2, aryl group having carbon number not less than 6; R2 is hydrogen or alky group having carbon number from 1 to 3; A is alkylene group having carbon number from 3 or 4; m and n are positive numbers wherein m is more than n and the sum of m and n is more than 9 and less than 12. Also provided is a method of using the dispersant composition in a mortar or concrete, and the weight percentage of the dispersant composition is from 0.01% to 2.5% based on the weight of cement in mortar.Type: GrantFiled: December 5, 2018Date of Patent: March 21, 2023Assignee: Construction Research & Technology, GmbHInventors: Toshimi Matsumoto, Viswanath Mahadevan, Fang Hua Lei
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Publication number: 20210163356Abstract: A dispersant composition includes a) at least one polymer constituted of monomers having naphthalene ring and/or melamine; b). at least one polymer having carboxylic acid and/or phosphoric acid group and/or any group that is hydrolyzed into carboxylic or phosphoric; and c). at least one polymer having a structure of Formula I: R1 is hydrogen or alky group having carbon number not less than 1, cycloalkyl or cycloalkenyl group having carbon number not less than 3, alkenyl group having carbon number not less than 2, aryl group having carbon number not less than 6; R2 is hydrogen or alky group having carbon number from 1 to 3; A is alkylene group having carbon number from 3 or 4; m and n are positive numbers wherein m is more than n and the sum of m and n is more than 9 and less than 12. Also provided is a method of using the dispersant composition in a mortar or concrete, and the weight percentage of the dispersant composition is from 0.01% to 2.5% based on the weight of cement in mortar.Type: ApplicationFiled: December 5, 2018Publication date: June 3, 2021Inventors: Toshimi MATSUMOTO, Viswanath MAHADEVAN, Fang Hua LEI
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Patent number: 8519029Abstract: A non-ionic polyether-polyester copolymer for extending workability to a cementitious mixture containing hydraulic cement and water, wherein the copolymer includes residues of at least the following monomers: Component A including an ethylenically unsaturated carboxylic acid ester monomer having a moiety hydrolysable in the cementitious mixture, wherein the hydrolyzed monomer residue has an active binding site for a component of the cementitious mixture; and, at least one of: Component B including an ethylenically unsaturated, carboxylic acid ester or alkenyl ether monomer having at least one C2-4 oxyalkylene side group of about 1 to 30 units; or, Component C including an ethylenically unsaturated, carboxylic acid ester or alkenyl ether monomer having at least one C2-4 oxyalkylene side group of 31 to about 350 units; wherein the molar ratio of Component A to the sum of the molar ratios of Component B and Component C is about 1:1 to about 10:1.Type: GrantFiled: June 3, 2009Date of Patent: August 27, 2013Assignee: Construction Research & Technology GmbHInventors: Klaus K. Lorenz, Alexander Kraus, Thomas M. Vickers, Jr., Suzanne Lianopoulos, Viswanath Mahadevan
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Patent number: 8178637Abstract: The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium.Type: GrantFiled: July 7, 2010Date of Patent: May 15, 2012Assignee: The Goodyear Tire & Rubber CompanyInventors: Dane Kenton Parker, Frank James Feher, Viswanath Mahadevan
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Publication number: 20100273952Abstract: The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium.Type: ApplicationFiled: July 7, 2010Publication date: October 28, 2010Applicant: THE GOODYEAR TIRE & RUBBER COMPANYInventors: Dane Kenton Parker, Frank James Feher, Viswanath Mahadevan
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Patent number: 7812108Abstract: The present invention discloses a process for synthesizing a hydrogenated polymer that comprises: (1) preparing a aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; (2) initiating polymerization of said monomer within the aqueous polymerization medium to produce a latex of an unsaturated polymer; (3) treating the latex of the unsaturated polymer with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from the group consisting of hydrazine and hydrates of hydrazine; and (c) a metal ion activator to produce the hydrogenated polymer.Type: GrantFiled: October 9, 2007Date of Patent: October 12, 2010Assignee: The Goodyear Tire & Rubber CompanyInventors: Dane Kenton Parker, Frank James Feher, Viswanath Mahadevan
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Patent number: 7767775Abstract: The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium.Type: GrantFiled: June 16, 2006Date of Patent: August 3, 2010Assignee: The Goodyear Tire & Rubber CompanyInventors: Dane Kenton Parker, Frank James Feher, Viswanath Mahadevan
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Publication number: 20090312460Abstract: A non-ionic polyether-polyester copolymer for extending workability to a cementitious mixture containing hydraulic cement and water, wherein the copolymer includes residues of at least the following monomers: Component A including an ethylenically unsaturated carboxylic acid ester monomer having a moiety hydrolysable in the cementitious mixture, wherein the hydrolyzed monomer residue has an active binding site for a component of the cementitious mixture; and, at least one of: Component B including an ethylenically unsaturated, carboxylic acid ester or alkenyl ether monomer having at least one C2-4 oxyalkylene side group of about 1 to 30 units; or, Component C including an ethylenically unsaturated, carboxylic acid ester or alkenyl ether monomer having at least one C2-4 oxyalkylene side group of 31 to about 350 units; wherein the molar ratio of Component A to the sum of the molar ratios of Component B and Component C is about 1:1 to about 10:1.Type: ApplicationFiled: June 3, 2009Publication date: December 17, 2009Inventors: Klaus K. Lorenz, Alexander Kraus, Thomas M. Vickers, JR., Suzanne Lianopoulos, Viswanath Mahadevan
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Patent number: 7592409Abstract: The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium.Type: GrantFiled: June 29, 2007Date of Patent: September 22, 2009Assignee: The Goodyear Tire & Rubber CompanyInventors: Dane Kenton Parker, Frank James Feher, Viswanath Mahadevan
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Patent number: 7528204Abstract: The present invention discloses a process for synthesizing a hydrogenated polymer that comprises: (1) preparing a aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; (2) initiating polymerization of said monomer within the aqueous polymerization medium to produce a latex of an unsaturated polymer; (3) treating the latex of the unsaturated polymer with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from the group consisting of hydrazine and hydrates of hydrazine; and (c) a metal ion activator to produce the hydrogenated polymer.Type: GrantFiled: May 2, 2005Date of Patent: May 5, 2009Assignee: The Goodyear Tire & Rubber CompanyInventors: Dane Kenton Parker, Frank James Feher, Viswanath Mahadevan
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Publication number: 20080090962Abstract: The present invention discloses a process for synthesizing a hydrogenated polymer that comprises: (1) preparing a aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; (2) initiating polymerization of said monomer within the aqueous polymerization medium to produce a latex of an unsaturated polymer; (3) treating the latex of the unsaturated polymer with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from the group consisting of hydrazine and hydrates of hydrazine; and (c) a metal ion activator to produce the hydrogenated polymer.Type: ApplicationFiled: October 9, 2007Publication date: April 17, 2008Inventors: Dane Parker, Frank Feher, Viswanath Mahadevan
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Publication number: 20080051543Abstract: The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium.Type: ApplicationFiled: June 29, 2007Publication date: February 28, 2008Applicant: The Goodyear Tire & Rubber CompanyInventors: Dane Parker, Frank Feher, Viswanath Mahadevan
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Patent number: 7335714Abstract: The present invention is directed to sulfine control agents for synthesizing polymers via controlled free radical polymerization and to the polymers resulting therefrom. Such polymers include repeat units derived from the controlled free radical polymerization, particularly reversible atom fragmentation transfer (RAFT) polymerization, of at least one vinyl-containing monomer, at least one conjugated diene monomer, or combinations thereof, in the presence of a sulfine compound having the formula: wherein R1 is alkyl, cycloalkyl, substituted alkyl, heteroalkyl, heterocycloalkyl or substituted heterocycloalkyl, and wherein Y is alkyl, cycloalkyl, substituted alkyl, heteroalkyl, heterocycloalkyl, substituted heterocycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, alkoxy, amino or thio.Type: GrantFiled: January 18, 2007Date of Patent: February 26, 2008Assignee: The Goodyear Tire & Rubber CompanyInventors: Frank James Feher, Viswanath Mahadevan, Dane Kenton Parker
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Publication number: 20060241258Abstract: The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium.Type: ApplicationFiled: June 16, 2006Publication date: October 26, 2006Applicant: The Goodyear Tire & Rubber CompanyInventors: Dane Parker, Frank Feher, Viswanath Mahadevan
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Patent number: 7098280Abstract: The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium.Type: GrantFiled: July 21, 2005Date of Patent: August 29, 2006Assignee: The Goodyear Tire & Rubber CompanyInventors: Dane Kenton Parker, Frank James Feher, Viswanath Mahadevan
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Patent number: 6992156Abstract: The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium.Type: GrantFiled: November 25, 2003Date of Patent: January 31, 2006Assignee: The Goodyear Tire & Rubber CompanyInventors: Dane Kenton Parker, Frank James Feher, Viswanath Mahadevan
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Publication number: 20050282957Abstract: The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium.Type: ApplicationFiled: July 21, 2005Publication date: December 22, 2005Inventors: Dane Parker, Frank Feher, Viswanath Mahadevan
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Publication number: 20050256253Abstract: The present invention discloses a process for synthesizing a hydrogenated polymer that comprises: (1) preparing a aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; (2) initiating polymerization of said monomer within the aqueous polymerization medium to produce a latex of an unsaturated polymer; (3) treating the latex of the unsaturated polymer with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from the group consisting of hydrazine and hydrates of hydrazine; and (c) a metal ion activator to produce the hydrogenated polymer.Type: ApplicationFiled: May 2, 2005Publication date: November 17, 2005Inventors: Dane Parker, Frank Feher, Viswanath Mahadevan
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Patent number: 6852865Abstract: Epoxides, aziridines, thiiranes, oxetanes, lactones, lactams and analogous compounds are reacted with carbon monoxide in the presence of a catalytically effective amount of catalyst having the general formula [Lewis acid]z+{[QM(CO)x]w?}y where Q is any ligand and need not be present, M is a transition metal selected from the group consisting of Groups 4, 5, 6, 7, 8, 9 and 10 of the periodic table of elements, z is the valence of the Lewis acid and ranges from 1 to 6, w is the charge of the metal carbonyl and ranges from 1 to 4 and y is a number such that w times y equals z, and x is a number such as to provide a stable anionic metal carbonyl for {[QM(CO)x]w?}y and ranges from 1 to 9 and typically from 1 to 4.Type: GrantFiled: December 2, 2002Date of Patent: February 8, 2005Assignee: Cornell Research Foundation, Inc.Inventors: Geoffrey W. Coates, Yutan D. Y. L. Getzler, Peter Wolczanski, Viswanath Mahadevan
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Publication number: 20040127634Abstract: The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium.Type: ApplicationFiled: November 25, 2003Publication date: July 1, 2004Inventors: Dane Kenton Parker, Frank James Feher, Viswanath Mahadevan