Patents by Inventor Ramaswamy Nagarajan
Ramaswamy Nagarajan 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).
-
Publication number: 20240242854Abstract: Disclosed herein is a curable composition with high optical transparency and good oxygen and moisture barrier properties, compositions for making the same, and methods of making and of using the same.Type: ApplicationFiled: December 28, 2023Publication date: July 18, 2024Inventors: Jayant Kumar, Ramaswamy Nagarajan, Siddhant Iyer, Ravi Mosurkal, Lian Li, Claire Lepont
-
Publication number: 20240098887Abstract: A flexible circuit module is disclosed. The flexible circuit module includes a fabric member including a plurality of fibers having non-conductive elements, and conductive elements oriented through the plane of the fabric. Each conductive element includes a first fiber element strand and a first unterminated end opposite the first fiber element strand, and a second fiber element strand having second unterminated end opposite the second fiber element strand. The fabric member further includes a first side with the first fiber element strands extending therefrom and a second side with second fiber element strands extending therefrom. A first hook-and-loop busbar is conductively connected to the first fiber element strands and a second hook-and-loop busbar is conductively connected to the second fiber element strands.Type: ApplicationFiled: March 31, 2023Publication date: March 21, 2024Applicants: University of Massachusetts, U.S. GovernmentInventors: Ramaswamy NAGARAJAN, Jayant KUMAR, Ravi MOSURKAL, Siddhant IYER, Claire LEPONT, Lian LI
-
Patent number: 10845335Abstract: An electrochemical tongue can be used for detection of metal ions. The reference electrode of the electrochemical tongue can be coated with a polymer. More than one reference electrode can be used, and the electrochemical tongue can be inserted into a cone penetrometer for portable, in situ analysis.Type: GrantFiled: March 16, 2018Date of Patent: November 24, 2020Assignee: University of MassachusettsInventors: Pradeep Kurup, Ramaswamy Nagarajan, Timothy Ponrathnam, Weeradech Kiratitanavit
-
Patent number: 10731040Abstract: A method of forming a crosslinked polyphenol, the method comprising: reacting a bio-based phenolic compound comprising at least one phenolic hydroxyl group, with a crosslinking agent comprising at least two functional groups reactive with the phenolic hydroxyl group, wherein the at least two functional groups are each independently a halogen group, acid halide group, sulfonyl halide group, glycidyl group, anhydride group, or a combination comprising at least one of the foregoing, to provide the crosslinked polyphenol.Type: GrantFiled: July 12, 2017Date of Patent: August 4, 2020Assignees: THE UNIVERSITY OF MASSACHUSETTS, THE GOVERNMENT OF THE UNITED STATES, REPRESENTED BY THE SECRETARY OF THE ARMYInventors: Ramaswamy Nagarajan, Jayant Kumar, Ravi Mosurkal, Zhiyu Xia
-
Publication number: 20200056057Abstract: A synergistic flame retardant composition comprising a phenolic compound comprising condensed tannin, hydrolysable tannin, lignin, cardanol, quercetin, catechin, epicatechin, anthocyanidin, catechol, dopamine, hydroxytyrosol, adrenaline, 4-hydroxyphenylacetic acid, gallic acid, digallic acid, methyl gallate, ellagic acid, phloroglucinol, hexahydroxydiphenic acid, luteic acid, casuarictin, or a combination thereof; and a phosphorus-containing compound comprising a C5-7 carbocyclic polyol substituted with at least one phosphate group.Type: ApplicationFiled: August 16, 2019Publication date: February 20, 2020Inventors: Ramaswamy Nagarajan, Jayant Kumar, Ravi Mosurkal, Zhiyu Xia, Shiran Yu, Weeradech Kiratitanavit
-
Publication number: 20180246059Abstract: An electrochemical tongue can be used for detection of metal ions. The reference electrode of the electrochemical tongue can be coated with a polymer. More than one reference electrode can be used, and the electrochemical tongue can be inserted into a cone penetrometer for portable, in situ analysis.Type: ApplicationFiled: March 16, 2018Publication date: August 30, 2018Inventors: Pradeep Kurup, Ramaswamy Nagarajan, Timothy Ponrathnam, Weeradech Kiratitanavit
-
Publication number: 20180016445Abstract: A method of forming a crosslinked polyphenol, the method comprising: reacting a bio-based phenolic compound comprising at least one phenolic hydroxyl group, with a crosslinking agent comprising at least two functional groups reactive with the phenolic hydroxyl group, wherein the at least two functional groups are each independently a halogen group, acid halide group, sulfonyl halide group, glycidyl group, anhydride group, or a combination comprising at least one of the foregoing, to provide the crosslinked polyphenol.Type: ApplicationFiled: July 12, 2017Publication date: January 18, 2018Inventors: Ramaswamy Nagarajan, Jayant Kumar, Ravi Mosurkal, Zhiyu Xia
-
Patent number: 9815912Abstract: A surfactant produced by reacting naturally occurring polysaccharides that are not water soluble with a hydrophilic substituent on a carboxylic portion of the polysaccharide. In a second reaction, the surfactant is further substituted on a hydroxylic portion with a hydrophobic or lipophilic substituent, so as to make the reaction product both water soluble and capable of attracting oily material that is hydrophobic to be removed from a substrate by cleaning in water. Methods of making the surfactant and the follow-on reaction product are described.Type: GrantFiled: March 15, 2013Date of Patent: November 14, 2017Assignee: University of MassachusettsInventors: Zarif Farhana Mohd Aris, Ryan M. Bouldin, Ramaswamy Nagarajan, Bridgette Budhlall, Vishal Bavishi
-
Publication number: 20160025678Abstract: An electrochemical tongue can be used for detection of metal ions. The reference electrode of the electrochemical tongue can be coated with a polymer. More than one reference electrode can be used, and the electrochemical tongue can be inserted into a cone penetrometer for portable, in situ analysis.Type: ApplicationFiled: April 3, 2014Publication date: January 28, 2016Inventors: Pradeep Kurup, Ramaswamy Nagarajan, Seth Robertson, Timothy Ponratham, Junghwan Cho, Weeradech Kiratitanavit
-
Publication number: 20150366074Abstract: Metal flakes, an organic metal precursor, an organic solvent and either no binder, or a volatile or a thermally decomposable binder are combined to form a paste. The paste is deposited in a circuit pattern on a substrate and the circuit pattern is cured. While curing, the organic metal precursor decomposes to leave an electrically conductive path, and the printed circuit is thus formed. A precursor to an electrically conductive circuit material includes an organic metal precursor, metal microparticles, and an organic solvent. The method can be employed to form printed circuits, for a variety of electrical, electronic and sensing application, such as crack detection in ceramic, plastics, concrete, wood, fabric, leather, rubber or paper and composite materials.Type: ApplicationFiled: March 31, 2015Publication date: December 17, 2015Inventors: Ramaswamy Nagarajan, Sharavanan Balasubramanian, Julie Chen, Joey Mead
-
Patent number: 9080001Abstract: A chemical compound of structural formula (I) useful in preparation of flame retardant materials is disclosed. Homopolymer, and copolymers of a compound of formula (I), as well as methods of preparing said homo- and copolymers are also disclosed. Polymers described herein advantageous possess low heat release capacities and high char yields.Type: GrantFiled: April 30, 2012Date of Patent: July 14, 2015Assignee: University of MassachusettsInventors: Jayant Kumar, E. Bryan Coughlin, Todd Emrick, Bon-Cheol Ku, Sethumadhavan Ravichandran, Subhalakshmi Nagarajan, Ramaswamy Nagarajan, Weeradech Kiratitanavit
-
Patent number: 9038483Abstract: Wireless strain and displacement sensors wirelessly monitor structural health and integrity, and are made by printing inductor-interdigital capacitor sensing circuits on a variety of substrates, including ceramic substrates, with thermally processable conductive inks. Sensors of the invention can be employed to detect strain and displacement of civil structures, such as bridges and buildings. The sensors include sensing elements that are mounted or printed on stiff, inflexible substrates, which prevent the sensing elements from bending, stretching, or otherwise warping when the sensor is strained. An interlayer between the sensing elements allows the sensing elements to move with respect to each other during application of strain. Thus, strain causes the sensing elements to move but not to deform, causing changes in sensor resonance that can be detected through wireless radio-frequency interrogation.Type: GrantFiled: September 7, 2010Date of Patent: May 26, 2015Assignee: University of MassachusettsInventors: Ramaswamy Nagarajan, Jungrae Park, Sharavanan Balasubramaniam, Mario J. Cazeca, Shivshankar Sivasubramanian, Joey Mead, Julie Chen
-
Patent number: 8999431Abstract: Metal flakes, an organic metal precursor, an organic solvent and either no binder, or a volatile or a thermally decomposable binder are combined to form a paste. The paste is deposited in a circuit pattern on a substrate and the circuit pattern is cured. While curing, the organic metal precursor decomposes to leave an electrically conductive path, and the printed circuit is thus formed. A precursor to an electrically conductive circuit material includes an organic metal precursor, metal microparticles, and an organic solvent. The method can be employed to form printed circuits, for a variety of electrical, electronic and sensing application, such as crack detection in ceramic, plastics, concrete, wood, fabric, leather, rubber or paper and composite materials.Type: GrantFiled: December 1, 2009Date of Patent: April 7, 2015Assignee: University of Massachusetts LowellInventors: Ramaswamy Nagarajan, Sharavanan Balasubramaniam, Julie Chen, Joey Mead
-
Publication number: 20140155569Abstract: A chemical compound of structural formula (I) useful in preparation of flame retardant materials is disclosed. Homopolymer, and copolymers of a compound of formula (I), as well as methods of preparing said homo- and copolymers are also disclosed. Polymers described herein advantageous possess low heat release capacities and high char yields.Type: ApplicationFiled: April 30, 2012Publication date: June 5, 2014Applicant: UNIVERSITY OF MASSACHUSETTSInventors: Jayant Kumar, E. Bryan Coughlin, Todd Emrick, Bon-Cheol Ku, Sethumadhavan Ravichandran, Subhalakshmi Nagarajan, Ramaswamy Nagarajan, Weeradech Kiratitanavit
-
Publication number: 20140045218Abstract: A surfactant produced by reacting naturally occurring polysaccharides that are not water soluble with a hydrophilic substituent on a carboxylic portion of the polysaccharide. In a second reaction, the surfactant is further substituted on a hydroxylic portion with a hydrophobic or lipophilic substituent, so as to make the reaction product both water soluble and capable of attracting oily material that is hydrophobic to be removed from a substrate by cleaning in water. Methods of making the surfactant and the follow-on reaction product are described.Type: ApplicationFiled: March 15, 2013Publication date: February 13, 2014Applicant: University of MassachusettsInventors: Zarif Farhana Mohd Aris, Ryan M. Bouldin, Ramaswamy Nagarajan, Bridgette Budhlall, Vishal Bavishi
-
Publication number: 20120297888Abstract: Wireless strain and displacement sensors wirelessly monitor structural health and integrity, and are made by printing inductor-interdigital capacitor sensing circuits on a variety of substrates, including ceramic substrates, with thermally processable conductive inks. Sensors of the invention can be employed to detect strain and displacement of civil structures, such as bridges and buildings. The sensors include sensing elements that are mounted or printed on stiff, inflexible substrates, which prevent the sensing elements from bending, stretching, or otherwise warping when the sensor is strained. An interlayer between the sensing elements allows the sensing elements to move with respect to each other during application of strain. Thus, strain causes the sensing elements to move but not to deform, causing changes in sensor resonance that can be detected through wireless radio-frequency interrogation.Type: ApplicationFiled: September 7, 2010Publication date: November 29, 2012Inventors: Ramaswamy Nagarajan, Jungrae Park, Sharavanan Balasubramaniam, Mario J. Cazeca, Shivshankar Sivasubramanian, Joey Mead, Julie Chen
-
Publication number: 20120273263Abstract: Metal flakes, an organic metal precursor, an organic solvent and either no binder, or a volatile or a thermally decomposable binder are combined to form a paste. The paste is deposited in a circuit pattern on a substrate and the circuit pattern is cured. While curing, the organic metal precursor decomposes to leave an electrically conductive path, and the printed circuit is thus formed. A precursor to an electrically conductive circuit material includes an organic metal precursor, metal microparticles, and an organic solvent. The method can be employed to form printed circuits, for a variety of electrical, electronic and sensing application, such as crack detection in ceramic, plastics, concrete, wood, fabric, leather, rubber or paper and composite materials.Type: ApplicationFiled: December 1, 2009Publication date: November 1, 2012Inventors: Ramaswamy Nagarajan, Sharavanan Balasubramaniam, Julie Chen, Joey Mead
-
Patent number: 8143308Abstract: A method for synthesizing a biocompatible, water-soluble oligo/polyflavanoid, includes polymerizing an optionally substituted flavanoid with a polymerization agent in the presence of a biocompatible polymerization solubilizer, thereby producing the biocompatible, soluble oligo/polyflavanoid. Also included is a biocompatible, soluble, oligo/polyflavanoid or a pharmaceutically acceptable salt, solvate, or complex thereof. Also included are methods of treating a subject for cancer, cardiac damage, viral infection, and obesity.Type: GrantFiled: October 29, 2007Date of Patent: March 27, 2012Assignees: University of Massachusetts Lowell, The United States of America, as represented by the Secretary of the ArmyInventors: Ferdinando F. Bruno, Jayant Kumar, Subhalakshmi Nagarajan, Susan J. Braunhut, Ramaswamy Nagarajan, Lynne A. Samuelson, Donna McIntosh, Klaudia Foley
-
Publication number: 20090170928Abstract: A method for synthesizing a biocompatible, water-soluble oligo/polyflavanoid, includes polymerizing an optionally substituted flavanoid with a polymerization agent in the presence of a biocompatible polymerization solubilizer, thereby producing the biocompatible, soluble oligo/polyflavanoid. Also included is a biocompatible, soluble, oligo/polyflavanoid or a pharmaceutically acceptable salt, solvate, or complex thereof. Also included are methods of treating a subject for cancer, cardiac damage, viral infection, and obesity.Type: ApplicationFiled: October 29, 2007Publication date: July 2, 2009Inventors: Ferdinando F. Bruno, Jayant Kumar, Subhalakshmi Nagarajan, Susan J. Braunhut, Ramaswamy Nagarajan, Lynne A. Samuelson, Donna McIntosh, Klaudia Foley
-
Patent number: 7510739Abstract: An assembled hematin is formed by depositing hematin on an electrically charged substrate in one or more layers alternating with one or more layers of polyelectrolyte, preferably a cationic polymer. In a method for polymerizing an aromatic monomer, the assembled hematin is contacted with the monomer and a template, preferably an anionic polymer. In a method for polymerizing aniline, the aniline, sulfonated multi walled carbon nano tubes, PEG hematin and a reaction initiator are dispersed in water.Type: GrantFiled: April 21, 2005Date of Patent: March 31, 2009Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Ferdinando Bruno, Lynne A. Samuelson, Ramaswamy Nagarajan, Jayant Kumar, Michael Sennett