Patents Assigned to Indian Institute of Technology Madras
  • Patent number: 10361567
    Abstract: The embodiments herein provide an energy storage battery system constituting multiple banks of individual batteries, each of which may have different characteristics, and methods of operation of the system. The multiple battery banks configuration is based on split battery configuration derived by a splitter based on a probability distribution function (pdf) of expected usage pattern, optimization goal, and battery characteristics of a corresponding single battery system. The energy system optimizes at least one of cost, weight or size of the overall system by rotating usage of various battery banks based on usage pattern.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: July 23, 2019
    Assignees: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IITM), RELIANCE - IITM TELECOM CENTRE OF EXCELLENCE
    Inventors: Ashok Jhunjhunwala, Prabhjot Kaur
  • Patent number: 10337414
    Abstract: 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: Grant
    Filed: April 27, 2015
    Date of Patent: July 2, 2019
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY, MADRAS (IITM)
    Inventors: Meenatchidevi Murugesan, Vishnu R Unni, Vineeth Nair Vinod, Sujith Raman Pillai Indusekharan Nair
  • Patent number: 10330662
    Abstract: 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: Grant
    Filed: November 17, 2014
    Date of Patent: June 25, 2019
    Assignees: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS), OIL INDIA LIMITED
    Inventors: Jitendra Sangwai, Ramesh Gardas, Sivabalan Sakthivel, Sugirtha Velusamy, Srinivasan V Raju, Prashant Dhodapkar
  • Publication number: 20190139667
    Abstract: Metal-graphene nanocomposites, metal-oxide-graphene nanocomposites, and method for their preparation are described. According to some embodiments, a metal salt is combined with graphite oxide (GO) to form a metal salt-GO composite. The metal salt-GO composite is reduced to a metal-graphene or metal oxide-graphene nanocomposite material. The metals may be magnetic or non-magnetic. In some embodiments, the reduction is conducted via exposure to intensified electromagnetic radiation, such as focused solar radiation.
    Type: Application
    Filed: June 6, 2018
    Publication date: May 9, 2019
    Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Ramaprabhu Sundara, Eswaraiah Varrla, Jyothirmayee Aravind Sasidharannair Sasikaladevi
  • Patent number: 10267519
    Abstract: A method and system for determining one or more precursors to control blowout in a combustor is provided. The method includes obtaining a time series signal corresponding to a dynamic state variable of the combustor. The method includes detecting one or more precursor based on an analysis of the time series signal using one or more parameters to control blowout in the combustor. One or more parameters include a Hurst exponent estimation, a Burst count estimation, and a recurrence quantification based estimation.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: April 23, 2019
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Vishnu Rajasekharan Unni, Vineeth Nair Vinod, Sujith Raman Pillai Indusekharan Nair
  • Publication number: 20190112494
    Abstract: The present invention relates to adurable and multifunctional superhydrophobic coating composition and water based fabrication method of producing the durable and multifunctional superhydrophobic coating composition via chemical modification and functionalization of hydrophilic material by silanes under room temperature without any organic solvents. Synthesis of chemically modified cellulose nanofibers or clay in water forms excellent water repelling thin films upon coating over various substrates. The super hydrophobic materials are used as additive for paints, pigments, paper, varnish and, textile and used for various industrial applications such as construction of buildings and other super structures.
    Type: Application
    Filed: October 17, 2018
    Publication date: April 18, 2019
    Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Pradeep Thalappil, Avijit Baidya, Mohd. Azhardin Ganayee, Swathy Jakka Ravindran
  • Patent number: 10196564
    Abstract: 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: Grant
    Filed: June 27, 2016
    Date of Patent: February 5, 2019
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Pradeep Thalappil, Sreeprasad Theruvakkattil Sreenivasan, Shihabudheen Mundampra Maliyekkal
  • Patent number: 10193649
    Abstract: Embodiments herein disclose a method of enabling non-ICBM transmissions in the communication network. The method includes transmitting information of the number of receiver antennas at user equipments (UEs) intended to be scheduled by a transmitter in common resource elements, to a controller in the communication network. Further, the method includes receiving a number of non-Interference Cancelling Block Modulation (ICBM) transmissions from the controller. Furthermore, the method includes transmitting information indicating cell-identification numbers of participating transmitters, and corresponding index of ICBM precoder matrix of the participating transmitters to the UEs.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: January 29, 2019
    Assignees: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Krishnamurthy Giridhar, Devar Sendilramkumar Subbiah, Ayyar Arun Balavenkatasubramanian
  • Patent number: 10173178
    Abstract: A carbon dioxide membrane structure, a method of making the same, and a carbon dioxide separator including the same. The membrane structure may include a carbon dioxide separation membrane containing PVA and a carrier, and a polysulfone-based support having an average pore size ranging from about 40 to about 90 ?m.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: January 8, 2019
    Assignees: BLOOM ENERGY CORPORATION, INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Abhijit Deshpande, Susy Varughese, Rahul Shevate, Elamathi Swaminathan, Kadhiresan Ambalavanan, Shraddesh Malviya, Chockkalingam Karuppaiah, Arne Ballantine, Michael Gasda
  • Patent number: 10168479
    Abstract: Embodiments herein provide method and apparatus for modifying dimensions of a waveguide. The method includes positioning a shadow mask, with an aperture, above the waveguide, fabricated on a substrate. Further, the method includes spatially filtering, a substance through the aperture in the shadow mask on a portion of the waveguide. Furthermore, the method includes obtaining an adiabatic spot size converter at least at one end of the waveguide by adjusting a distance between the shadow mask and a surface of the waveguide to modify the dimensions of the waveguide.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: January 1, 2019
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Sujith Chandran, Subramanian Meenatchi Sundaram, Bijoy Krishna Das
  • Patent number: 10122426
    Abstract: Embodiments herein provide a method for beam steering in a Multiple Input Multiple Output (MIMO) system. The method includes steering a transmit beam using a precoder matrix determined based on a plurality of parameters, wherein the transmit beam is formed using at least one of a weight of each antenna element, a number of antenna elements, and an inter-antenna element spacing.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: November 6, 2018
    Assignees: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Jeniston Deviraj Klutto Milleth, Chandrasekaran Mohandoss, Sendilramkumar Devar, Thulasiram Jonna, Abhijeet Masal, Bhaskar Ramamurthi
  • Patent number: 10095247
    Abstract: A method for detecting onset of oscillatory instability in a device is described. The method includes obtaining a symbolic time series of a time series signal corresponding to a dynamic state variable of the device. The method further includes detecting the onset of oscillatory instability in the device based on the symbolic time series.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: October 9, 2018
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Vishnu Rajasekharan Unni, Vineeth Nair Vinod, Sujith Raman Pillai Indusekharan Nair, Achintya Mukhopadhyay
  • Patent number: 10073065
    Abstract: The invention relates to a continuous monitoring system which will monitor the pipes without the need of shutting down of the plants. The major issues in designing such a system using magnetostriction as per prior art is the loss of magnetization of the permanent magnets used to provide the magnetic bias and also the disbonding of interfaced adhesives with which the magnetostrictive ribbons are bonded at high temperatures. The invention identifies a novel sensor which can be taken up to high temperatures without any loss of signal strength, this is achieved by generating guided waves using a special amorphous magnetostrictive ribbons. L(0, 2) mode waves are generated using these ribbons to monitor pipes working at high temperatures as per the invention.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: September 11, 2018
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Krishnan Balasubramaniam, Tarun Kumar Mishra
  • Patent number: 10047311
    Abstract: Gas hydrate slurry formation systems are provided. The gas hydrate slurry formation system includes a cavitation chamber configured to receive a fluid and a cavitation device placed within the cavitation chamber. The cavitation device is configured to form a plurality of bubbles within the fluid in the cavitation chamber. The gas hydrate slurry formation system also includes a gas inlet configured to introduce a gas within the cavitation chamber such that the gas is entrained in the plurality of bubbles to form a plurality of gas-entrained bubbles. The plurality of gas-entrained bubbles implode within the cavitation chamber to form a gas hydrate slurry.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: August 14, 2018
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventor: Jitendra Sangwai
  • Patent number: 10003084
    Abstract: Methods of forming metal nanoparticle-graphene composites are provided. The methods can include mixing a metal precursor with graphite oxide in the presence of a liquid medium to form a metal precursor-graphite oxide mixture, and exfoliating the graphite oxide and reducing the metal precursor in the metal precursor-graphite oxide mixture to deposit metal nanoparticles on a first major surface of a graphene sheet formed by exfoliation of the graphite oxide.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: June 19, 2018
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Ramaprabhu Sundara, Vinayan Bhaghavathi Parambath, Rupali Nagar
  • Patent number: 9988488
    Abstract: A catalysts for poly(lactide) synthesis having the structure of Formula I: wherein R1 and R2 is, independently, C1-C6 alkoxy, and R3 arylalkyl or substituted phenyl are disclosed. Method of synthesizing the catalysts and method of using the catalysts to prepare poly(lactides) and compositions comprising the catalyst are also disclosed.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: June 5, 2018
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Debashis Chakraborty, Swarup Ghosh, Venkatachalam Ramkumar
  • Patent number: 9989076
    Abstract: Methods and systems for harvesting mechanical energy for transformation into electrical energy are described. An energy harvesting apparatus may include a housing having fluid disposed therein and a piston assembly configured to move within the housing in one of an extension stroke and a compression stroke. The piston assembly may include a bidirectional rotor configured to rotate responsive to the piston assembly moving in either of the extension stroke and the compression stroke. The bidirectional rotor may be connected to a rotary generator such that rotational energy generated by rotation of the bidirectional rotor may be transferred to the rotary generator. Electrical energy may be produced by the rotary generator responsive to receiving the rotational energy.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: June 5, 2018
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventor: Abdus Samad
  • Patent number: 9982002
    Abstract: Methods and compositions of catalysts for sulfoxidation reaction processes are disclosed. The sulfoxidation reaction process can be performed in an aqueous medium, and the catalysts can be recycled for further use. In some embodiments, a method of making a catalyst may include contacting a transition metal compound with an oxidizing agent to form a first solution, contacting a carboxylic acid compound with a cationic surfactant to form a second solution, mixing the first solution and the second solution to form a precipitate, and isolating the precipitate.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: May 29, 2018
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Dillip Kumar Chand, Rajan Deepan Chakravarthy
  • Patent number: 9958367
    Abstract: 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: Grant
    Filed: April 9, 2014
    Date of Patent: May 1, 2018
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Jitendra Sangwai, Chirag Khalde
  • Patent number: 9944774
    Abstract: 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: Grant
    Filed: January 8, 2013
    Date of Patent: April 17, 2018
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Ramaprabhu Sundara, Eswaraiah Varrla, Jyothirmayee Aravind Sasidharannair Sasikaladevi, Krishnan Balasubramanian