Patents by Inventor Kumar Sridharan

Kumar Sridharan 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: 20210363645
    Abstract: Disclosed is a method for manufacturing free-standing cladding tubes with multi-layer structures. According to the method, a cylindrical mandrel substrate defining a hollow cylindrical inner space is provided. A first cold spray powder metal is selected. The cylindrical mandrel substrate is rotated and the first cold spray powder metal is applied to an outer surface of the cylindrical mandrel substrate to form a first layer. The cylindrical mandrel substrate is removed.
    Type: Application
    Filed: May 19, 2020
    Publication date: November 25, 2021
    Applicant: Westinghouse Electric Company LLC
    Inventors: Paolo FERRONI, Peng XU, Michael ICKES, Hwasung YEOM, Kumar SRIDHARAN, Benjamin R. MAIER, Greg O. JOHNSON
  • Patent number: 11043308
    Abstract: A method is described for forming duplex layers including an interlayer and a corrosion resistant boundary layer on a nuclear fuel rod cladding tube for use in a water cooled nuclear reactor. The method includes forming, by thermal deposition or physical vapor deposition, on the exterior of a substrate, an inner interlayer with Mo, Ta, W or Nb or other particles, and forming, by thermal deposition or physical vapor deposition, on the interlayer, an outer corrosion resistant layer with particles selected from the group consisting of Cr, a Cr alloy, and combinations thereof. The interlayer prevents eutectic formation between the corrosion resistant layer and the substrate.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: June 22, 2021
    Assignee: Westinghouse Electric Company LLC
    Inventors: Edward J. Lahoda, Peng Xu, Robert Oelrich, Kumar Sridharan, Benjamin Maier, Greg Johnson
  • Patent number: 10823671
    Abstract: One or more light sources emit light within first, second, and third wavelength ranges through exhaust gas. The first and second wavelength ranges are characterized by first and second different absorption wavelength ranges of a background gas. The third wavelength range is characterized by an absorption wavelength range of a gas-of-interest. At least some of the light within the first, second, and third wavelength ranges is absorbed by the exhaust gas thereby providing modified light characterized by the first, second, and third absorption wavelength ranges. One or more detectors receive the modified light. A processing subsystem determines a temperature of the exhaust gas based on the modified light characterized by the first and second absorption wavelength ranges and a concentration of the gas-of-interest based on the modified light characterized by the third absorption wavelength range and the temperature of the exhaust gas.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: November 3, 2020
    Assignee: General Electric Company
    Inventors: Rachit Sharma, David Kelly Moyeda, Chayan Mitra, Arun Kumar Sridharan, Anish Bekal, Eric YuHang Fung
  • Publication number: 20200161010
    Abstract: The invention relates to SiC ceramic matrix composite (CMC) claddings with metallic, ceramic and/or multilayer coatings applied on the outer surface for improved corrosion resistance and hermeticity protection. The coating includes one or more materials selected from FeCrAl, Y, Zr and Al—Cr alloys, Cr2O3, ZrO2 and other oxides, chromium carbides, CrN, Zr- and Y-silicates and silicides. The coatings are applied employing a variety of known surface treatment technologies including cold spray, thermal spray process, physical vapor deposition process (PVD), and slurry coating.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 21, 2020
    Applicants: Westinghouse Electric Company LLC, Wisconsin Alumni Research Foundation
    Inventors: Edward J. Lahoda, Peng Xu, Robert L. Oelrich, JR., Hwasung Yeom, Kumar Sridharan
  • Patent number: 10566095
    Abstract: A method is provided for coating the substrate of a component, such as a zirconium alloy cladding tube, for use in a water cooled nuclear reactor under normal operating conditions and under high temperature oxidation conditions. The method includes heating a pressurized carrier gas to a temperature between 200° C. and 1200° C., adding chromium or chromium-based alloy particles having an average diameter of 20 microns or less to the heated carrier gas, and spraying the carrier gas and particles onto the substrate at a velocity, preferably from 800 to 4000 ft./sec. (about 243.84 to 1219.20 meters/sec.), to form a chromium and/or chromium-based alloy coating on the substrate to a desired thickness.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: February 18, 2020
    Assignee: Westinghouse Electric Company LLC
    Inventors: Edward J. Lahoda, Peng Xu, Zeses Karoutas, Sumit Ray, Kumar Sridharan, Benjamin Maier, Greg Johnson
  • Publication number: 20200051702
    Abstract: A zirconium alloy cladding tube for use in a water cooled nuclear reactor under normal operating conditions and under high temperature oxidation conditions is described. The cladding tube has a coating uniformly deposited thereon. The coating, which may be up to 300 microns thick, is selected from the group consisting of chromium, a chromium-based alloy, and combinations thereof.
    Type: Application
    Filed: September 17, 2019
    Publication date: February 13, 2020
    Applicants: WESTINGHOUSE ELECTRIC COMPANY LLC, WISCONSIN ALUMNI RESEARCH FOUNDATION
    Inventors: EDWARD J. LAHODA, PENG XU, ZESES KAROUTAS, SUMIT RAY, KUMAR SRIDHARAN, BENJAMIN MAIER, GREG JOHNSON
  • Patent number: 10438697
    Abstract: In the present invention, a control device for use in connection with a medical device or system in order to operate various functions of the medical device or system is provided that does not require a wired connection or internal power source for the operation of the control device. The control device in certain embodiments can take the form of a footpedal that is formed without electronics, without a printed circuit board (PCB), without a wireless module and without a battery. In this configuration the control device is formed to be entirely passive in operation, thus eliminating the issues with regard to control devices connected to medical devices and systems using wired connections and wireless transmission modules.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: October 8, 2019
    Assignee: General Electric Company
    Inventors: Pradeep Kumar Sridharan, Muthu Revathy Authuvan, Narasimha Murthy Vinay, Hiteshkumar Thakarshibhai Boda, Carlos Martinez Ferreira, Shijin Krishna
  • Publication number: 20180259448
    Abstract: One or more light sources emit light within first, second, and third wavelength ranges through exhaust gas. The first and second wavelength ranges are characterized by first and second different absorption wavelength ranges of a background gas. The third wavelength range is characterized by an absorption wavelength range of a gas-of-interest. At least some of the light within the first, second, and third wavelength ranges is absorbed by the exhaust gas thereby providing modified light characterized by the first, second, and third absorption wavelength ranges. One or more detectors receive the modified light. A processing subsystem determines a temperature of the exhaust gas based on the modified light characterized by the first and second absorption wavelength ranges and a concentration of the gas-of-interest based on the modified light characterized by the third absorption wavelength range and the temperature of the exhaust gas.
    Type: Application
    Filed: December 22, 2015
    Publication date: September 13, 2018
    Applicant: General Electric Comany
    Inventors: Rachit SHARMA, David Kelly MOYEDA, Chayan MITRA, Arun Kumar SRIDHARAN, Anish BEKAL, Eric YuHang FUNG
  • Publication number: 20180113983
    Abstract: In the present invention, a control device for use in connection with a medical device or system in order to operate various functions of the medical device or system is provided that does not require a wired connection or internal power source for the operation of the control device. The control device in certain embodiments can take the form of a footpedal that is formed without electronics, without a printed circuit board (PCB), without a wireless module and without a battery. In this configuration the control device is formed to be entirely passive in operation, thus eliminating the issues with regard to control devices connected to medical devices and systems using wired connections and wireless transmission modules.
    Type: Application
    Filed: October 25, 2016
    Publication date: April 26, 2018
    Inventors: Pradeep Kumar Sridharan, Muthu Revathy Authuvan, Narasimha Murthy Vinay, Hiteshkumar Thakarshibhai Boda, Carlos Martinez Ferreira, Shijin Krishna
  • Publication number: 20180096743
    Abstract: A method is described for forming duplex layers including an interlayer and a corrosion resistant boundary layer on a nuclear fuel rod cladding tube for use in a water cooled nuclear reactor. The method includes forming, by thermal deposition or physical vapor deposition, on the exterior of a substrate, an inner interlayer with Mo, Ta, W or Nb or other particles, and forming, by thermal deposition or physical vapor deposition, on the interlayer, an outer corrosion resistant layer with particles selected from the group consisting of Cr, a Cr alloy, and combinations thereof. The interlayer prevents eutectic formation between the corrosion resistant layer and the substrate.
    Type: Application
    Filed: October 2, 2017
    Publication date: April 5, 2018
    Applicants: WESTINGHOUSE ELECTRIC COMPANY, LLC, WISCONSIN ALUMNI RESEARCH FOUNDATION
    Inventors: EDWARD J. LAHODA, PENG XU, ROBERT OELRICH, KUMAR SRIDHARAN, BENJAMIN MAIER, GREG JOHNSON
  • Publication number: 20180025793
    Abstract: A method is provided for coating the substrate of a component, such as a zirconium alloy cladding tube, for use in a water cooled nuclear reactor under normal operating conditions and under high temperature oxidation conditions. The method includes heating a pressurized carrier gas to a temperature between 200° C. and 1200° C., adding chromium or chromium-based alloy particles having an average diameter of 20 microns or less to the heated carrier gas, and spraying the carrier gas and particles onto the substrate at a velocity, preferably from 800 to 4000 ft./sec. (about 243.84 to 1219.20 meters/sec.), to form a chromium and/or chromium-based alloy coating on the substrate to a desired thickness.
    Type: Application
    Filed: October 3, 2016
    Publication date: January 25, 2018
    Applicants: WESTINGHOUSE ELECTRIC COMPANY LLC, WISCONSIN ALUMNI RESEARCH FOUNDATION
    Inventors: EDWARD J. LAHODA, PENG XU, ZESES KAROUTAS, SUMIT RAY, KUMAR SRIDHARAN, BENJAMIN MAIER, GREG JOHNSON
  • Publication number: 20180025794
    Abstract: A method is described herein for coating the substrate of a component for use in a water cooled nuclear reactor to provide a barrier against corrosion. The method includes providing a zirconium alloy substrate; and coating the substrate with particles selected from the group consisting of metal oxides, metal nitrides, FeCrAl, FeCrAlY, and high entropy alloys. Depending on the metal alloy chosen for the coating material, a cold spray or a plasma arc spray process may be employed for depositing various particles onto the substrate. An interlayer of a different material, such as a Mo, Nb, Ta, or W transition metal or a high entropy alloy, may be positioned in between the Zr-alloy substrate and corrosion barrier layer.
    Type: Application
    Filed: October 3, 2016
    Publication date: January 25, 2018
    Applicants: WESTINGHOUSE ELECTRIC COMPANY LLC, WISCONSIN ALUMNI RESEARCH FOUNDATION
    Inventors: EDWARD J. LAHODA, PENG XU, ZESES KAROUTAS, SIMON MIDDLEBURGH, SUMIT RAY, KUMAR SRIDHARAN, BENJAMIN MAIER, GREG JOHNSON
  • Patent number: 9478244
    Abstract: A method of protecting a magnetic information storage medium is described. The method includes fabricating a film over a surface of the magnetic information storage medium. The film includes an amorphous, uniform, homogeneous solid solution of carbon, hydrogen, silicon, and oxygen. A magnetic storage medium with such a protective film is described.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: October 25, 2016
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Robert W. Carpick, Kumar Sridharan
  • Patent number: 9300705
    Abstract: Described herein are methods and systems for interfacing heterogeneous endpoints and web-based media sources in a video conference. Interfacing heterogeneous endpoints can be challenging due to audio/video (A/V) streams being encoded in a format that is proprietary to a media provider of the A/V stream (e.g., format that is proprietary to Skype). To address such a challenge, a client application from the media provider may be installed at a virtual machine, and may be used to decode A/V streams that are encoded in a format proprietary to the media provider. Further, to display content from a web-based media source (e.g., YouTube) in a video conference, a browser may be installed at a virtual machine, and may be used to virtually render a media signal from the web-based media source, such virtually rendered media signal subsequently being captured and presented in a video conference.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: March 29, 2016
    Assignee: Blue Jeans Network
    Inventors: Alagu Periyannan, Prasad R. Mohire, Michael Grupenhoff, Swaroop Kulkarni, Akshay Kumar Sridharan, Nithin A. Prakash, Emmanuel Weber, Anand Raghavan, Kelly Wong
  • Publication number: 20150044510
    Abstract: A method of protecting a magnetic information storage medium is described. The method includes fabricating a film over a surface of the magnetic information storage medium. The film includes an amorphous, uniform, homogeneous solid solution of carbon, hydrogen, silicon, and oxygen. A magnetic storage medium with such a protective film is described.
    Type: Application
    Filed: September 15, 2014
    Publication date: February 12, 2015
    Inventors: Robert W. Carpick, Kumar Sridharan
  • Publication number: 20140313278
    Abstract: Described herein are methods and systems for interfacing heterogeneous endpoints and web-based media sources in a video conference. Interfacing heterogeneous endpoints can be challenging due to audio/video (A/V) streams being encoded in a format that is proprietary to a media provider of the A/V stream (e.g., format that is proprietary to Skype). To address such a challenge, a client application from the media provider may be installed at a virtual machine, and may be used to decode A/V streams that are encoded in a format proprietary to the media provider. Further, to display content from a web-based media source (e.g., YouTube) in a video conference, a browser may be installed at a virtual machine, and may be used to virtually render a media signal from the web-based media source, such virtually rendered media signal subsequently being captured and presented in a video conference.
    Type: Application
    Filed: March 17, 2014
    Publication date: October 23, 2014
    Inventors: Alagu Periyannan, Prasad R. Mohire, Michael Grupenhoff, Swaroop Kulkarni, Akshay Kumar Sridharan, Nithin A. Prakash, Emmanuel Weber, Anand Raghavan, Kelly Wong
  • Publication number: 20110107473
    Abstract: Diamond-like carbon (DLC) coated nanoprobes and methods for fabricating such nanoprobes are provided. The nanoprobes provide hard, wear-resistant, low friction probes for use in such applications as atomic force microscopy, nanomachining, nanotribology, metrology and nanolithography. The diamond-like carbon coatings include a carbon implantation layer which increases adhesion of a deposited DLC layer to an underlying nanoprobe tip.
    Type: Application
    Filed: March 14, 2007
    Publication date: May 5, 2011
    Inventors: Robert W. Carpick, Kumar Sridharan, Anirudha V. Sumant
  • Patent number: 7087447
    Abstract: A method for batch manufacturing of slabs for zig-zag lasers including steps of bonding two non-active media to either side of an active medium to form a sandwich, dicing the sandwich to provide slices, rendering two surfaces of each slice into total-internal-reflection (TIR) surfaces, and then dicing the slices perpendicular to the TIR surfaces to provide a plurality of zig-zag slabs.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: August 8, 2006
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Arun Kumar Sridharan, Shailendhar Saraf, Robert L. Byer