Patents Assigned to Indian Institute of Technology Madras
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Patent number: 9958367Abstract: An apparatus for measuring rheological parameters of a multi-phase fluid is provided. The apparatus includes a static chamber containing a multi-phase fluid having at least a first phase and a second phase. The apparatus also includes a rotor member submersed in the multiphase fluid in the static chamber. The rotor member includes a first set of threads formed on a first portion of the rotor member submersed in the first phase of the multi-phase fluid and a second set of threads formed on a second portion of the rotor member submersed in the second phase of the multi-phase fluid.Type: GrantFiled: April 9, 2014Date of Patent: May 1, 2018Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Jitendra Sangwai, Chirag Khalde
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Graphene functionalized carbon nanotube polymer composites and methods for their preparation and use
Patent number: 9944774Abstract: Methods of forming graphene functionalized carbon nanotube polymer composites are provided. The methods can include functionalizing a plurality of carbon nanotubes using conducting functional molecules to form a composite nanofiller and embedding the composite nanofiller within a polymer material to form the graphene functionalized carbon nanotube polymer composite.Type: GrantFiled: January 8, 2013Date of Patent: April 17, 2018Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Ramaprabhu Sundara, Eswaraiah Varrla, Jyothirmayee Aravind Sasidharannair Sasikaladevi, Krishnan Balasubramanian -
Patent number: 9926202Abstract: Procedures for the synthesis of zero dimension GQDs based on exfoliation/reduction of surface passivated functionalized graphite oxide (f-GO PEG) are described. The synthesis procedures can include exfoliation/reduction f-GO PEG in presence of hydrogen gas, using focused solar radiation and under vacuum.Type: GrantFiled: August 14, 2014Date of Patent: March 27, 2018Assignee: Indian Institute of Technology MadrasInventors: Ramaprabhu Sundara, Tessy Theres Baby, Adarsh Kaniyoor
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Patent number: 9923706Abstract: The embodiments herein provide a method for In Band Full Duplex (IBFD) communication in a radio network including at least one IBFD node, at least one first non-IBFD User Equipment (UE) and at least one second non-IBFD UE. The method includes transmitting by the at least one IBFD node a first signal to the at least one first non-IBFD UE over a forward channel, and receiving by the at least one IBFD node a second signal from the at least one second non-IBFD UE over the same forward channel simultaneously, where the second signal includes at least one of a pilot signal, Channel State Information (CSI), and control information, where the forward channel is orthogonal to a reverse channel in at least one of time, frequency, space, and code.Type: GrantFiled: July 15, 2016Date of Patent: March 20, 2018Assignees: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, INDIAN INSTITUTE OF TECHNOLOGY, MADRASInventors: Ankit Sharma, Jeniston Deviraj Klutto Milleth, Radha Krishna Ganti, Sunil Kaimalettu, Bhaskar Ramamurthi
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Patent number: 9903821Abstract: Coated mesoflower are described including: a metallic mesoflower core having a first surface and including at least one protrusion terminating in a tip; a non-metallic coating covering and substantially conformal to the first surface, thereby creating an outer surface of the coated mesoflower; and a marker material having an optical property that is enhanced in the presence of the coated mesoflower. Coated hollow mesoflowers that do not have the metallic mesoflower core are also described.Type: GrantFiled: April 30, 2014Date of Patent: February 27, 2018Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Pradeep Thalappil, Sajanlal Panikkanvalappil Ravindranathan
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Patent number: 9878913Abstract: Technologies are generally described for forming graphene and structures including graphene. In an example, a system effective to form graphene may include a chamber adapted to receive graphite oxide. The system may also include a source of an inert gas and a source of hydrogen, which may both be configured in communication with the chamber. A processor may be configured in communication with the chamber, the inert gas source and/or the hydrogen source. The processor may be further configured to control the flow of the inert gas from the first source through the chamber under first sufficient reaction conditions to remove at least some oxygen from the atmosphere of the chamber. The processor may also be configured to control the flow of the hydrogen from the second source to the graphite oxide in the chamber under second sufficient reaction conditions to form graphene from the graphite oxide.Type: GrantFiled: June 15, 2011Date of Patent: January 30, 2018Assignee: Indian Institute of Technology MadrasInventors: Sundara Ramaprabhu, Adarsh Kaniyoor, Tessy Theres Baby
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Patent number: 9882116Abstract: Methods for fabricating a piezoelectric device are provided. The methods can include providing a substrate and forming a nanocrystalline diamond layer on a first surface of the substrate. The methods can also include depositing a piezoelectric layer on a first surface of the nanocrystalline diamond layer.Type: GrantFiled: May 2, 2016Date of Patent: January 30, 2018Assignee: Indian Institute of Technology MadrasInventors: Maneesh Chandran, M. S. Ramachandra Rao
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Patent number: 9868106Abstract: Methods of forming a diatom-based nanocomposite are provided. The methods include mixing at least one diatomic material, one or more metal precursors, and functionalized graphite oxide to form a mixture. The methods also include exfoliating the mixture in presence of hydrogen to reduce functionalized graphite oxide to graphene and reducing the one or more metal precursors to metal nanoparticles. The methods further include depositing the metal nanoparticles on the diatomic material to form the diatom-based nanocomposite.Type: GrantFiled: June 17, 2015Date of Patent: January 16, 2018Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Ramaprabhu Sundara, Sangeetha Vellaichamy, Abinaya Shunmugam
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Patent number: 9863860Abstract: An apparatus for measuring rheological properties of a multi-phase fluid is provided. The apparatus includes a static chamber configured to contain a multi-phase fluid having at least a first phase and a second phase. The apparatus also includes a rotor member submersed in the multi-phase fluid in the static chamber. The rotor member is rotatable about a horizontal rotational axis within the static chamber and the static chamber and the rotor member are oriented in a substantially horizontal direction.Type: GrantFiled: August 12, 2014Date of Patent: January 9, 2018Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Chirag Khalde, Jitendra Sangwai
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Patent number: 9847534Abstract: Methods of forming a metal-alloy graphene nanocomposites are provided. The methods include providing a graphene substrate and forming a conducting polymer layer on a first major surface of the graphene substrate. The methods also include pyrolyzing the conducting polymer layer to form a nitrogen-doped graphene substrate and dispersing a plurality of metal-alloy nanoparticles on a first surface of the nitrogen-doped graphene substrate to form the nanocomposite.Type: GrantFiled: August 8, 2012Date of Patent: December 19, 2017Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Ramaprabhu Sundara, Vinayan Bhaghavathl Parambath, Rupali Nagar, Rajalakshmi Natarajan
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Patent number: 9843409Abstract: Embodiments herein provide a Multiple-Input Multiple-Output (MIMO) method for a communication system in general, and more particularly to an Orthogonal Frequency Division Multiplexing (OFDM) based communication system to serve more than one receivers on the same resources. The method includes selecting, by a transmitter, a plurality of precoder matrices for a plurality of receivers from a predefined codebook of precoders, where the plurality of precoder matrices is dynamically cycled within an allocated resource. Further, the method includes transmitting, by the transmitter, a symbol vector precoded with the plurality of precoder matrices over MIMO channel associated with the plurality of receivers.Type: GrantFiled: May 11, 2016Date of Patent: December 12, 2017Assignees: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, INDIAN INSTITUTE OF TECHNOLOGY, MADRASInventors: Jeniston Deviraj Klutto Milleth, Chandrasekaran Mohandoss, Sendilramkumar Devar, Thulasiram Jonna, Abhijeet Masal, Bhaskar Ramamurthi
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Patent number: 9804054Abstract: A system for early detection of onset of oscillatory instabilities in practical devices is described. The system consists of a measuring device, an instability detection unit and a control unit. The measuring device is configured to generate signals corresponding to the dynamics happening inside the practical device. The instability detection unit is configured to diagnose the stability of the practical device from the signals that are generated by the measuring device. Further, the control unit is configured to control various operating parameters in the practical device based on the information obtained from the instability detection unit.Type: GrantFiled: March 25, 2013Date of Patent: October 31, 2017Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Vineeth Nair Vinod, Gireeshkumaran Thampi, Sulochana Karuppusamy, Saravanan Gopalan, Sujith Raman Pillai Indusekharan Nair
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Patent number: 9733184Abstract: Composite materials comprising a mesoflower structure, methods of preparing the composite material, and methods of detecting heavy metal ion using the composite material are described herein. In some embodiments, a silica-coated gold mesoflower with a layer of silver quantum clusters may be capable of detecting Hg2+ ions in a sample at zeptomolar concentrations.Type: GrantFiled: August 10, 2012Date of Patent: August 15, 2017Assignee: Indian Institute of Technology MadrasInventors: Pradeep Thalappil, Ammu Mathew, Panikkanvalappil Ravindranathan Sajanlal
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Publication number: 20170051683Abstract: The invention includes a method for predicting the operational state of equipment with turbulent flow characterized by time series data relating to its operation. The invention further includes a system and method for predicting the onset of an impending oscillatory instability. Further, the invention includes a system and method for identifying an impending absorbing transition such as flame blowout in combustion systems. A variable representing the dynamics of operation is measured with the help of a sensor, to obtain time series data. A complex network is then derived from the measured time series data. Network properties are then calculated using the complex network to identify the state of stability relating to operation of the equipment. The stability information may include one of thermoacoustic instability, aero-elastic instability such as flutter, flow-induced vibration, magneto-hydrodynamic, aerodynamic, aeromechanical, aero-acoustic instability or onset of flame blowout of a combustor.Type: ApplicationFiled: April 27, 2015Publication date: February 23, 2017Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Meenatchidevi MURUGESAN, Vishnu R UNNI, Vineeth NAIR VINOD, Sujith RAMAN PILLAI INDUSEKHARAN NAIR
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Publication number: 20170022405Abstract: Technologies are generally described for forming a nanofluid coolant and structures including a nanofluid coolant. In an example, a method of forming a nanofluid coolant may comprise combining a compound with an acid and with purified water to form a solution. The compound may include manganese. The method may further include heating the solution and, after heating the solution, cooling the solution effective to form at least one precipitate that includes manganese and oxygen. The method may further include filtering the at least one precipitate to form a powder that includes manganese oxide nanotubes. The method may further include functionalizing the nanotubes by irradiating them with UV radiation. The method may further include combining the functionalized manganese oxide nanotubes with a polar solvent to form the nanofluid coolant.Type: ApplicationFiled: October 5, 2016Publication date: January 26, 2017Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Ramaprabhu Sundara, Jyothirmayee Aravind Sasidharannair Sasikaladevi
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Patent number: 9494517Abstract: A composition includes a quantum cluster of Agm or Aun, one or more protector molecules; and a molecular cavity partially or wholly surrounding the quantum cluster. A method for preparing the quantum clusters includes adding a first amount of glutathione to a gold salt, a silver salt, or a mixture thereof to form a mixture; adding a reducing agent to the mixture to form a precipitate; and mixing the precipitate with a second amount of glutathione and a cyclodextrin to form a composition. Devices are prepared from the quantum clusters, and the devices may be used in methods of authentication of articles.Type: GrantFiled: February 9, 2015Date of Patent: November 15, 2016Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Pradeep Thalappil, Shibu Sidharth Edakkattuparambil
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Publication number: 20160304778Abstract: A luminescent nanocomposite comprising functionalized graphene and a luminescent moiety, its fabrication, and uses are described. The luminescent moiety is anchored non-covalently to the functionalized graphene. Luminescence properties of the nanocomposite may be modulated by choosing appropriate luminescent moieties such as native lactoferrin, native lactoferrin protected gold clusters, and so forth. Mechanical properties of the nanocomposite may be modulated by adding a biopolymer such as Chitosan. The nanocomposite may be used as a luminescent ink for encoding information, or a luminescent film for tagging articles of manufacture such as electronic waste components.Type: ApplicationFiled: June 27, 2016Publication date: October 20, 2016Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRASInventors: Pradeep THALAPPIL, Sreeprasad THERUVAKKATTIL SREENIVASAN, Shihabudheen MUNDAMPRA MALIYEKKAL
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Patent number: 9468903Abstract: Nanocomposite adsorbent materials and methods for their preparation and use are described. As an example, a polyaniline-graphite nanoplatelet nanocomposite may be used to adsorb carbon dioxide.Type: GrantFiled: December 2, 2013Date of Patent: October 18, 2016Assignee: Indian Institute of Technology MadrasInventors: Ramaprabhu Sundara, Ashish Kumar Mishra
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Patent number: 9464220Abstract: Technologies are generally described for forming a nanofluid coolant and structures including a nanofluid coolant. In an example, a method of forming a nanofluid coolant may comprise combining a compound with an acid and with purified water to form a solution. The compound may include manganese. The method may further include heating the solution and, after heating the solution, cooling the solution effective to form at least one precipitate that includes manganese and oxygen. The method may further include filtering the at least one precipitate to form a powder that includes manganese oxide nanotubes. The method may further include functionalizing the nanotubes by irradiating them with UV radiation. The method may further include combining the functionalized manganese oxide nanotubes with a polar solvent to form the nanofluid coolant.Type: GrantFiled: December 21, 2011Date of Patent: October 11, 2016Assignee: Indian Institute of Technology MadrasInventors: Sundara Ramaprabhu, Jyothirmayee Aravind Sasidharannair Sasikaladevi
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Publication number: 20160290984Abstract: A method of screening solvents for the solubilization of petroleum hydrocarbons is disclosed. The method includes dissolving petroleum hydrocarbons in a selected solvent to form a first solution, adding an ionic liquid to the first solution and blending to form a second solution and measuring absorbance of the second solution using spectroscopic techniques. The solubilization of petroleum hydrocarbons in the solvent is then determined based on the difference between the measured absorbance of the first and second solution. A system for screening solvents for the solubilization of petroleum hydrocarbons is also disclosed. The system can be used in removal of wax deposition in refinery process equipment, process flow lines, during piping operations, upgradation of wax, prevention of clogging of pipelines, processing of sludge or for removing sludge from petroleum tank installations and enhancing the crude oil flow.Type: ApplicationFiled: November 17, 2014Publication date: October 6, 2016Applicants: INDIAN INSTITUTE OF TECHNOLOGY MADRAS, OIL INDIA LIMITEDInventors: JITENDRA SANGWAI, RAMESH GARDAS, SIVABALAN SAKTHIVEL, SUGIRTHA VELUSAMY, SRINIVASAN V RAJU, PRASHANT DHODAPKAR