Patents by Inventor Ajay Subramanian

Ajay Subramanian 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).

  • Patent number: 11807533
    Abstract: Laser-induced graphene (LIG) and laser-induced graphene scrolls (LIGS) materials and, more particularly to LIGS, methods of making LIGS (such as from polyimide (PI)), laser-induced removal of LIG and LIGS, and 3D printing of LIG and LIGS using a laminated object manufacturing (LOM) process.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: November 7, 2023
    Assignee: William Marsh Rice University
    Inventors: James M. Tour, Duy X. Luong, Ajay Subramanian
  • Patent number: 11677128
    Abstract: A method includes receiving a radio frequency (RF) input signal using at least one non-reciprocal circulator. The method also includes generating an RF output signal using at least one of one or more reflective circuit elements. Each reflective circuit element is configured to receive an RF signal from the at least one non-reciprocal circulator and to provide a modified RF signal to the at least one non-reciprocal circulator. The RF output signal represents the RF input signal as modified by the at least one of the one or more reflective circuit elements.
    Type: Grant
    Filed: May 4, 2021
    Date of Patent: June 13, 2023
    Assignee: Raytheon Company
    Inventors: Ajay Subramanian, Zhaoyang C. Wang, Jason C. Soric, Matthew A. Morton
  • Patent number: 11522525
    Abstract: A finite impulse response (FIR) filter including an input of the FIR filter that receives an RF input signal, a clock input configured to receive a clock signal, an output of the FIR filter that provides a filtered output signal, a plurality of signal paths including a plurality of sample-and-hold circuits and a plurality of multipliers arranged in parallel, each signal path including a respective sample-and-hold circuit and a respective multiplier being configured to receive the RF input signal and the clock signal to provide a modulated output signal, an adder configured to receive n modulated output signals from the plurality of signal paths and combine the n modulated output signals to produce the filtered output signal, and a controller.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: December 6, 2022
    Assignee: RAYTHEON COMPANY
    Inventors: Ajay Subramanian, Zhaoyang C. Wang, Matthew A. Morton, Jack Holloway, John Cangeme
  • Patent number: 11456515
    Abstract: A method includes receiving a radio frequency (RF) input signal using at least one non-reciprocal circulator. The method also includes generating an RF output signal using at least one of multiple reflective filter elements. Each reflective filter element is configured to receive an RF signal from the at least one non-reciprocal circulator and to provide a filtered RF signal to the at least one non-reciprocal circulator. The reflective filter elements include amplitude change reflectors configured to modify amplitudes of the RF signal at different frequencies. The RF output signal represents the RF input signal as modified by the at least one of the reflective filter elements.
    Type: Grant
    Filed: May 4, 2021
    Date of Patent: September 27, 2022
    Assignee: Raytheon Company
    Inventors: Zhaoyang C. Wang, Ajay Subramanian, Jason C. Soric, Matthew A. Morton
  • Publication number: 20210384598
    Abstract: A method includes receiving a radio frequency (RF) input signal using at least one non-reciprocal circulator. The method also includes generating an RF output signal using at least one of one or more reflective circuit elements. Each reflective circuit element is configured to receive an RF signal from the at least one non-reciprocal circulator and to provide a modified RF signal to the at least one non-reciprocal circulator. The RF output signal represents the RF input signal as modified by the at least one of the one or more reflective circuit elements.
    Type: Application
    Filed: May 4, 2021
    Publication date: December 9, 2021
    Inventors: Ajay Subramanian, Zhaoyang C. Wang, Jason C. Soric, Matthew A. Morton
  • Publication number: 20210384599
    Abstract: A method includes receiving a radio frequency (RF) input signal using at least one non-reciprocal circulator. The method also includes generating an RF output signal using at least one of multiple reflective filter elements. Each reflective filter element is configured to receive an RF signal from the at least one non-reciprocal circulator and to provide a filtered RF signal to the at least one non-reciprocal circulator. The reflective filter elements include amplitude change reflectors configured to modify amplitudes of the RF signal at different frequencies. The RF output signal represents the RF input signal as modified by the at least one of the reflective filter elements.
    Type: Application
    Filed: May 4, 2021
    Publication date: December 9, 2021
    Inventors: Zhaoyang C. Wang, Ajay Subramanian, Jason C. Soric, Matthew A. Morton
  • Publication number: 20210376818
    Abstract: A finite impulse response (FIR) filter including an input of the FIR filter that receives an RF input signal, a clock input configured to receive a clock signal, an output of the FIR filter that provides a filtered output signal, a plurality of signal paths including a plurality of sample-and-hold circuits and a plurality of multipliers arranged in parallel, each signal path including a respective sample-and-hold circuit and a respective multiplier being configured to receive the RF input signal and the clock signal to provide a modulated output signal, an adder configured to receive n modulated output signals from the plurality of signal paths and combine the n modulated output signals to produce the filtered output signal, and a controller.
    Type: Application
    Filed: May 28, 2020
    Publication date: December 2, 2021
    Inventors: Ajay Subramanian, Zhaoyang C. Wang, Matthew A. Morton, Jack Holloway, John Cangeme
  • Publication number: 20210171351
    Abstract: Laser-induced graphene (LIG) and laser-induced graphene scrolls (LIGS) materials and, more particularly to LIGS, methods of making LIGS (such as from polyimide (PI)), laser-induced removal of LIG and LIGS, and 3D printing of LIG and LIGS using a laminated object manufacturing (LOM) process.
    Type: Application
    Filed: November 23, 2020
    Publication date: June 10, 2021
    Applicant: WILLIAM MARSH RICE UNIVERSITY
    Inventors: James M. Tour, Duy X. Luong, Ajay Subramanian
  • Patent number: 11014816
    Abstract: Laser-induced graphene (LIG) and laser-induced graphene scrolls (LIGS) materials and, more particularly to LIGS, methods of making LIGS (such as from polyimide (PI)), laser-induced removal of LIG and LIGS, and 3D printing of LIG and LIGS using a laminated object manufacturing (LOM) process.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: May 25, 2021
    Assignee: William Marsh Rice University
    Inventors: James M. Tour, Duy X. Luong, Ajay Subramanian
  • Patent number: 10742481
    Abstract: Techniques for performing near real-time analytics are provided. In one technique, different client devices generate different sets of events pertaining to the same or different media item. Events generated by one client device are assigned to one process (or machine) while events generated by another client device are assigned to a different process (or machine). Each process aggregates events assigned to it based on a time window to generate an aggregated event. The aggregated events are stored in persistent storage. In response to a request for a report that is associated with a media item, one or more of the aggregated events are retrieved from persistent storage and report data is generated based on the aggregated events. The report data is sent to the requestor for visual presentation.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: August 11, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Qi Chen, Yuriy Grinberg, Richard Mar, Wesley Hargrove, Arvind Kalyan, Apoorvi Kapoor, Ajay Subramanian
  • Publication number: 20200136889
    Abstract: Techniques for performing near real-time analytics are provided. In one technique, different client devices generate different sets of events pertaining to the same or different media item. Events generated by one client device are assigned to one process (or machine) while events generated by another client device are assigned to a different process (or machine). Each process aggregates events assigned to it based on a time window to generate an aggregated event. The aggregated events are stored in persistent storage. In response to a request for a report that is associated with a media item, one or more of the aggregated events are retrieved from persistent storage and report data is generated based on the aggregated events. The report data is sent to the requestor for visual presentation.
    Type: Application
    Filed: October 31, 2018
    Publication date: April 30, 2020
    Inventors: Qi Chen, Yuriy Grinberg, Richard Mar, Wesley Hargrove, Arvind Kalyan, Apoorvi Kapoor, Ajay Subramanian
  • Publication number: 20200002174
    Abstract: Laser-induced graphene (LIG) and laser-induced graphene scrolls (LIGS) materials and, more particularly to LIGS, methods of making LIGS (such as from polyimide (PI)), laser-induced removal of LIG and LIGS, and 3D printing of LIG and LIGS using a laminated object manufacturing (LOM) process.
    Type: Application
    Filed: June 21, 2017
    Publication date: January 2, 2020
    Applicant: WILLIAM MARSH RICE UNIVERSITY
    Inventors: James M. Tour, Duy X. Luong, Ajay Subramanian
  • Publication number: 20130321205
    Abstract: Disclosed subject matter is directed to techniques and systems for analyzing a system design having a phase array antenna. In at least one implementation, component models of individual components of the phased array antenna may be provided. The component models may be arranged as a multi-dimensional lookup table (LUT) in some embodiments. A single-channel model of antenna performance may be synthesized for the system design based on the component models. An analysis of the performance of the system design may then be performed using the single-channel model of antenna performance.
    Type: Application
    Filed: June 1, 2012
    Publication date: December 5, 2013
    Applicant: Raytheon Company
    Inventors: Mark J. Beals, Edgar J. Martinez, Jacob Kim, Ajay Subramanian, William F. Skalenda, Robert W. Alm, Lee A. McMillan