Patents Assigned to Indian Institute of Technology Madras
  • Patent number: 11471854
    Abstract: The process of reacting nanoscale ce-MoS2 nanosheets anchored on oxide support with lead in solution at room temperature whereby the reaction is rapid and spontaneous resulting in the formation of PbMoO4-xSx in the process of scavenging Pb2+ and Pb4+ present in the solution.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: October 18, 2022
    Assignee: Indian Institute of Technology Madras (IIT Madras)
    Inventors: Thalappil Pradeep, Biswajit Mondal, Ananthu Mahendranath, Anirban Som, Sandeep Bose, Tripti Ahuja, Avula Anil Kumar, Jyotirmoy Ghosh
  • Patent number: 11460638
    Abstract: A fused fibre coupler comprising: a single mode fibre, SMF, and an orbital angular momentum fibre, OAMF, the fibres having a coupling portion in which the fibres are longitudinally aligned side by side and fused at least over a coupling length in which the SMF and OAMF are tapered such that the diameter of the SMF and the diameter of the OAMF give the fibres matching effective refractive indices for a single mode of the SMF and an orbital angular momentum, OAM, mode of the OAMF for a coupled wavelength of light.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: October 4, 2022
    Assignees: UNIVERSITY OF SOUTHAMPTON, INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Shankar Pidishety, Balaji Srinivasan, Gilberto Brambilla
  • Patent number: 11454394
    Abstract: A system for early detection of onset of oscillatory instabilities in practical devices is described. The system consists of a measuring device (102), an instability detection unit (104) and a control unit (106). The measuring device (102) is configured to generate signals corresponding to the dynamics happening inside the practical device. The instability detection unit (104) along with an amplitude estimation unit (130) is configured to diagnose the stability of the practical device from the signals that are generated by the measuring device (102). Further, the control unit (106) is configured to control various operating parameters in the practical device based on the information obtained from the instability detection unit (104).
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: September 27, 2022
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)
    Inventors: Induja Pavithran, Vishnu Rajasekharan Unni, Raman Pillai Indusekharan Nair Sujith
  • Patent number: 11448073
    Abstract: Accordingly, embodiments herein disclose a system (500) for controlling admission volume of an inlet gas for fixed RPM operation of in an apparatus. The system (500) has a boiler (502) for generating a steam at a higher pressure for heating application in a process. A pressure reducing valve (PRV) (504) controls a boiler pressure to process pressure. Inlet ports and exhaust ports are configured by intersection of opening on a rotor housing (614) and opening on a rotating valve. Inlet ports are configured so that a port opening duration can be controlled to admit required volume of a steam corresponding to a mass flow requirement of the process. A port capable of changing the area and timing of opening in such a way that the duration and starting of exhaust can be controlled.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: September 20, 2022
    Assignee: Indian Institute of Technology, Madras (IIT Madras)
    Inventors: Vipin Venugopal, Satyanarayanan Seshadri
  • Patent number: 11411665
    Abstract: The method includes configuring a first CLI-RS configuration at a first UE (200a). Further, the method includes configuring a second CLI-RS configuration at a second UE (200b). Further, the method includes generating a CLI-RS sequence using a common CLI-RS reference point known to the first UE (200a) and the second UE (200b). Further, the method includes filling the CLI-RS sequence in the first set of CLI-RS resources indicated in the first CLI-RS configuration. Further, the method includes transmitting the CLI-RS sequence filled in the first set of CLI-RS resources indicated in the first CLI-RS configuration to the second UE (200b). Further, the method includes receiving the CLI-RS sequence transmitted by the first UE (200a). Further, the method includes processing the received CLI-RS sequence based on the second CLI-RS configuration.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: August 9, 2022
    Assignees: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)
    Inventors: Abhijeet Abhimanyu Masal, Priyanka Dey, Sunil Kaimalettu, Jeniston Deviraj Klutto Milleth, Bhaskar Ramamurthi
  • Publication number: 20220227671
    Abstract: An improved method for preparing porous mullite ceramic from Pickering emulsions stabilised by hetero-aggregate of oppositely charged fumed oxide particles. The method uses oppositely charged fumed oxide nano-particles (silica and alumina) to stabilize oil-in-water Pickering emulsions wherein the stabilized Pickering emulsions can be used as a template for preparing porous mullite material. An optimised Pickering emulsion template that is stabilised with fumed oxide nano-particles (silica and alumina) is used to produce a green body that is transformed into solid porous material with a controlled porosity and pore size by sintering.
    Type: Application
    Filed: May 21, 2020
    Publication date: July 21, 2022
    Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)
    Inventors: Nithin M, Manas MUKHERJEE, Basavaraj M GURAPPA
  • Patent number: 11378488
    Abstract: A system and method for optimizing passive control strategies of oscillatory instabilities in turbulent systems using finite-time Lyapunov exponents are disclosed. The method includes receiving data from one or more measuring devices connected to the turbulent flow system incorporating a control strategy in the flow field. One or more flow characteristics are determined from the data obtained from the measuring devices. The method involves computing critical dynamics from backward time finite-time Lyapunov exponent (FTLE) field based on the one or more flow characteristics. Next, one or more regions of critical dynamics associated with impending oscillatory instabilities in the turbulent flow system are identified. The identified region of critical dynamics is disrupted the control the onset of oscillatory instabilities in the turbulent flow system.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: July 5, 2022
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT Madras)
    Inventors: Premchand Chandramouly Premakumari, Vineeth Nair, Sujith Raman Pillai Indusekharan Nair, Nitin Babu George, Manikandan Raghunathan, Vishnu Rajasekharan Unni
  • Patent number: 11374705
    Abstract: Embodiments herein provides a method and apparatus for data communication in an OFDM system. The method comprising receiving by a second OFDM apparatus a plurality of parameters, a signal comprising data and at least one of a Reference Signal (RS) and a message from a first OFDM apparatus. The plurality of parameters comprises at least one of a numerology of the first apparatus, a numerology of the second apparatus, a ratio of numerology of the first apparatus to the second apparatus and a measurement window. The method includes filtering a desired band comprising the at least one of the RS and the message from the received signal, removing a cyclic prefix from the filtered signal, and decoding at least one of the RS and the message from the signal with adjusting a circular shift in the set of symbols based on the plurality of parameters.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: June 28, 2022
    Assignees: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)
    Inventors: Abhijeet Abhimanyu Masal, Priyanka Dey, Sunil Kaimalettu, Dhivagar Baskaran, Paka Venkata Sriharsha, Jeniston Deviraj Klutto Milleth, Bhaskar Ramamurthi
  • Patent number: 11368350
    Abstract: Accordingly, embodiments herein disclose a method for signal synchronization in orthogonal frequency-division multiplexing (OFDM) based Narrow Band-Internet of Thing (NB-IoT) system. The method includes generating a New Radio-Narrowband Primary Synchronization Signal (NR-NPSS). Further, the method includes mapping each Zadoff-chu sequence of 14 Zadoff-chu sequences of the NR-NPSS to resource elements of each OFDM symbol of 14 OFDM symbols in an NR-NPSS subframe.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: June 21, 2022
    Assignees: CENTRE OF EXCELLENCE IN WIRELESS TECHNOLOGY, INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IITMADRAS)
    Inventors: Budama Sree Charan Teja Reddy, Sunil Kaimalettu, Jeniston Deviraj Klutto Milleth, Bhaskar Ramamurthi
  • Patent number: 11351508
    Abstract: The present invention relates to a new method for creating nanopores in single layer molybdenum disulfide (MoS2) nanosheets (NSs) by the electrospray deposition (ESD) of silver ions on a water suspension of the former. Electrospray deposited silver ions react with the MoS2 NSs at the liquid-air interface resulting in Ag2S nanoparticles (NPs) which goes into the solution leaving the NSs with holes of 3-5 nm diameter. Specific reaction with the S of MoS2 NSs leads to Mo-rich edges. Such Mo-rich defects are highly efficient for the generation of active oxygen species such as H2O2, under visible light, which causes efficient disinfection of water. The holey MoS2 NSs shows 105 times higher efficiency in disinfection compared to normal MoS2 NSs. Developed a conceptual prototype and tested with multiple bacterial strains and a viral strain, demonstrating the utility of the method for practical applications.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: June 7, 2022
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS)
    Inventors: Pradeep Thalappil, Depanjan Sarkar, Anirban Som, Biswajit Mondal, Swathy Jakka Ravindran
  • Patent number: 11349548
    Abstract: Accordingly, the embodiment provides a method for detecting a beam failure event by a Base Station (BS) (100) in a wireless network (1000). The method includes transmitting at least one of a resource scheduling configuration and a reference signal configuration to at least one first User Equipment (UE) (300a) in the wireless network (1000). Further, the method includes determining whether at least one response is received from the first UE (300a). Further, the method includes detecting a beam failure event associated with at least one beam from the plurality of beams of the first UE (300a) in response to determining that the at least one response is not received from the first UE (300a).
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: May 31, 2022
    Assignees: Center of Excellence in Wireless Technology, Indian Institute of Technology Madras
    Inventors: Chandrasekaran Mohandoss, Thirunageswaram Ramachandran Ramya, Jeniston Deviraj Klutto Milleth, Bhaskar Ramamurthi
  • Publication number: 20220162469
    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: February 8, 2022
    Publication date: May 26, 2022
    Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Pradeep Thalappil, Avijit Baidya, Mohd. Azhardin Ganayee, Swathy Jakka Ravindran
  • Publication number: 20220162932
    Abstract: A fracking device (100) for generating shock waves in a well bore (102) comprises a fracking gun (110). The fracking gun (110) includes a cartridge (200) having a hollow cavity and a cylinder (202) disposed inside the hollow cavity of the cartridge (200). The cylinder (202) has a first chamber (210) and a second chamber (212). The first chamber (210) includes a plurality of explosive charges (206) positioned on an inner surface of the cylinder (202), wherein each of the explosive charges (206) contains an explosive mixture comprising hydrogen and stoichiometric oxygen in a predetermined ratio. The second chamber (212) contains a combustion-neutral gas. The first chamber (210) is separated from the second chamber (212) by a diaphragm (214).
    Type: Application
    Filed: January 17, 2020
    Publication date: May 26, 2022
    Applicant: Indian Institute of Technology, Madras
    Inventor: Rajesh Ravi Nair
  • Patent number: 11303320
    Abstract: According to the embodiment discloses a method providing direct RF sampling of the received signal in a full duplex system. A sampler in the full-duplex system comprises a buffer to clip an amplitude information from each of a coupled transmitter (Tx) signal and a voltage at an antenna port of the sampler for obtaining a buffered transmitter signal and a buffered voltage at the antenna port. Phase detector in the sampler is configured to perform sampling of time delay between the buffered transmitter signal and the voltage at the antenna port and generate an output. The sampler further comprises current integrator configured to pass the output of the phase detector for generating a sampled output, wherein the sampled output generates an output received signal.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: April 12, 2022
    Assignee: Indian Institute of Technology, Madras (IITM)
    Inventors: Abhishek Kumar, Sankaran Aniruddhan, Radha Krishna Ganti
  • Patent number: 11242468
    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: Grant
    Filed: October 17, 2018
    Date of Patent: February 8, 2022
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (ITT MADRAS)
    Inventors: Pradeep Thalappil, Avijit Baidya, Mohd. Azhardin Ganayee, Swathy Jakka Ravindran
  • Patent number: 11239878
    Abstract: Embodiments herein provide a transceiver system 1000a-1000f for full-duplex communication. The transceiver system 1000a-1000f includes an electrical balance based duplexer (EBD) 100 coupled with at least one transceiver 200a and 200b and at least one antenna 300a and 300b. The at least one antenna 300a and 300b is configured to transmit first signals and the at least one antennas 300a and 300b is configured to receive second signals using at least one circulators. The EBD 100 is configured to provide an isolation between the transmitting signals and the receiving signals in a same channel full duplex (SCFD) front-end circuit using the at least one circulators.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: February 1, 2022
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY, MADRA (IITM)
    Inventors: Abhishek Kumar, Sankaran Aniruddhan, Radha Krishna Ganti
  • Publication number: 20220018731
    Abstract: Disclosed are devices and methods of detecting and mitigating oscillatory instabilities in systems with turbulent flow, such as thermoacoustic, aeroacoustic or aeroelastic equipment. The system includes a sensor array for measuring one or more parameters of an operating equipment S, and an analysis and prediction unit. The analysis and prediction unit is configured to estimate a state tensor to identify a state of the equipment indicating stable operation or impending oscillatory instability. The system further includes an actuator array configured to implement a control action to promote stable operation of the equipment. Methods for robust prediction of the state of stability are also disclosed. A neural ordinary differential equation (ODE) method of predicting stability or instability is disclosed, involving forming a neural network that incorporates an equation characteristic of the operational state.
    Type: Application
    Filed: July 16, 2021
    Publication date: January 20, 2022
    Applicants: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (IIT MADRAS), UNIVERSITY OF CALIFORNIA SAN DIEGO
    Inventors: JAYESH DHADPHALE, EUSTAQUIO AGUILAR RUIZ, VISHNU RAJASEKHARAN UNNI, ABHISHEK SAHA, SUJITH INDUSEKHARAN NAIR
  • Patent number: 11018753
    Abstract: Embodiments herein provide a method for decoding received signal by node in wireless communication system. The method includes receiving a signal from a first User Equipment (UE), where the received signal comprises a set of preambles in which each preamble is identical to an at least one preamble in a preamble structure and obtaining a composite signal comprising a self-interference signal, where the self-interference signal is known at the node. Further, the method includes determining self-interference channel estimate using the composite signal and decoding the received signal by eliminating the self-interference signal from the received signal based on the self-interference channel estimate.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: May 25, 2021
    Assignee: INDIAN INSTITUTE OF TECHNOLOGY MADRAS
    Inventors: Radhakrishna Ganti, Arjun Nadh
  • Patent number: 11002668
    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, up-gradation 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: May 16, 2019
    Date of Patent: May 11, 2021
    Assignees: INDIAN INSTITUTE OF TECHNOLOGY MADRAS, OIL INDIA LIMITED
    Inventors: Jitendra Sangwai, Ramesh Gardas, Sivabalan Sakthivel, Sugirtha Velusamy, Srinivasan V Raju, Prashant Dhodapkar
  • Publication number: 20210060560
    Abstract: The present invention relates to the detection and isolation of target cells based on microfluidics and cell sorting technology (MicroFACS). In this method the biological cells and microparticles are encapsulated inside hydrodynamically generated droplets and analyzed using suitable optics based on fluorescence and scattering signals. Once the target cells are detected, the optics triggers electro-coalescence for sorting of the target cells into an aqueous stream.
    Type: Application
    Filed: April 5, 2018
    Publication date: March 4, 2021
    Applicant: INDIAN INSTITUTE OF TECHNOLOGY MADRAS (ITT MADRAS)
    Inventors: ASHIS KUMAR SEN, ABHISHEK SRIVASTAVA, RAVINDRA GAIKWARD, KARTHICK S, JAYAPRAKASH KS, ABHISHEK RAJ D, SNEHA MARIA M, PRIYANKAR SHIVHARE