Patents by Inventor Sreeram Dhurjaty

Sreeram Dhurjaty 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: 9683954
    Abstract: A material signature detector that provides for the assessment of changes in critical material properties of materials such as pharmaceuticals and solutions is disclosed. The material signature detector is non-contact and non-invasive and provides the ability to detect unintended changes in the contents of a vial or other container during the fill-finish process, transport, compounding, or storage. The material signature detector uses a novel resonant electrical impulse spectroscopy circuit that employs quadrature demodulation at lower frequencies to detect changes in the capacitance and conductance (resistance) of the sample under test. A series of digital signatures are created at different frequencies to provide an overall assessment of changes in the properties of the material under test. These digital signatures may in turn be stored in an electronic library for subsequent analytics.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: June 20, 2017
    Inventor: Sreeram Dhurjaty
  • Publication number: 20150212027
    Abstract: A material signature detector that provides for the assessment of changes in critical material properties of materials such as pharmaceuticals and solutions is disclosed. The material signature detector is non-contact and non-invasive and provides the ability to detect unintended changes in the contents of a vial or other container during the fill-finish process, transport, compounding, or storage. The material signature detector uses a novel resonant electrical impulse spectroscopy circuit that employs quadrature demodulation at lower frequencies to detect changes in the capacitance and conductance (resistance) of the sample under test. A series of digital signatures are created at different frequencies to provide an overall assessment of changes in the properties of the material under test. These digital signatures may in turn be stored in an electronic library for subsequent analytics.
    Type: Application
    Filed: January 27, 2014
    Publication date: July 30, 2015
    Inventor: Sreeram Dhurjaty
  • Patent number: 8389944
    Abstract: A digital radiography detector includes a housing having first and second spaced planar members and four side walls defining a cavity. A radiographic image detector assembly is mounted within the cavity for converting a radiographic image to an electronic radiographic image. The detector assembly includes a detector array mounted on a stiffener. A shock absorbing elastomer assembly is located within the cavity for absorbing shock to the detector array/stiffener in directions perpendicular to and parallel to the detector array/stiffener.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: March 5, 2013
    Assignee: Carestream Health, Inc.
    Inventors: Bradley S. Jadrich, Timothy A. Peter, Sreeram Dhurjaty, Jeffery R. Hawver, Mark D. Bedzyk
  • Publication number: 20110272588
    Abstract: A digital radiography detector includes a housing having first and second spaced planar members and four side walls defining a cavity. A radiographic image detector assembly is mounted within the cavity for converting a radiographic image to an electronic radiographic image. The detector assembly includes a detector array mounted on a stiffener. A shock absorbing elastomer assembly is located within the cavity for absorbing shock to the detector array/stiffener in directions perpendicular to and parallel to the detector array/stiffener.
    Type: Application
    Filed: July 19, 2011
    Publication date: November 10, 2011
    Inventors: Bradley S. Jadrich, Timothy A. Peter, Sreeram Dhurjaty, Jeffery R. Hawver, Mark D. Bedzyk
  • Patent number: 7989773
    Abstract: A digital radiography detector includes a housing and a radiographic image detector assembly. The housing has a first and second spaced planar members and four side walls defining a cavity. The radiographic image detector assembly is mounted within the cavity for converting a radiographic image to an electronic radiographic image. The detector assembly includes a scintillator screen and a detector array, and the detector assembly is bonded to the first planar member of the housing.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: August 2, 2011
    Assignee: Carestream Health, Inc.
    Inventors: Bradley S. Jadrich, Timothy A. Peter, Sreeram Dhurjaty, Jeffery R. Hawver, Mark D. Bedzyk
  • Publication number: 20100158197
    Abstract: A digital radiography detector includes a housing and a radiographic image detector assembly. The housing has a first and second spaced planar members and four side walls defining a cavity. The radiographic image detector assembly is mounted within the cavity for converting a radiographic image to an electronic radiographic image. The detector assembly includes a scintillator screen and a detector array, and the detector assembly is bonded to the first planar member of the housing.
    Type: Application
    Filed: March 1, 2010
    Publication date: June 24, 2010
    Inventors: Bradley S. Jadrich, Timothy A. Peter, Sreeram Dhurjaty, Jeffery R. Hawver, Mark D. Bedzyk
  • Publication number: 20090122959
    Abstract: A digital radiography detector includes a housing and a radiographic image detector assembly. The housing has a first and second spaced planar members and four side walls defining a cavity. The radiographic image detector assembly is mounted within the cavity for converting a radiographic image to an electronic radiographic image. The detector assembly includes a scintillator screen and a detector array, and the detector assembly is bonded to the first planar member of the housing.
    Type: Application
    Filed: January 16, 2009
    Publication date: May 14, 2009
    Inventors: Bradley S. Jadrich, Timothy A. Peter, Sreeram Dhurjaty, Jeffery R. Hawver, Mark D. Bedzyk
  • Patent number: 7495226
    Abstract: A digital radiography detector includes a housing having first and second spaced planar members and four side walls defining a cavity. A radiographic image detector assembly is mounted within the cavity for converting a radiographic image to an electronic radiographic image. The detector assembly includes a detector array mounted on a stiffener. A shock absorbing elastomer assembly is located within the cavity for absorbing shock to the detector array/stiffener in directions perpendicular to and parallel to the detector array/stiffener.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: February 24, 2009
    Assignee: Carestream Health, Inc.
    Inventors: Bradley S. Jadrich, Timothy A. Peter, Sreeram Dhurjaty, Jeffery R. Hawver, Mark D. Bedzyk
  • Patent number: 7456409
    Abstract: A low noise digital radiography image capture system employs a two-dimensional array of pixel sites in the image capture panel with each site having an analog-to-digital converter to digitize analog charge values produced by imaging radiation directly into corresponding digital data at the site prior to read-out to subsequent digital data processing electronics thereby avoiding noise and crosstalk problems associated with high frequency read-out of analog information. Fill factor problems caused by inclusion of integrated circuitry on the pixel site are minimized by inclusion of the A/D counter on the opposite side of the substrate support for the pixel site.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: November 25, 2008
    Assignee: Carestream Health, Inc.
    Inventors: Sreeram Dhurjaty, Timothy J. Wojcik
  • Patent number: 7453983
    Abstract: A method for delivering radiation therapy to a patient using a three-dimensional planning image for radiation therapy of the patient wherein the planning image includes a radiation therapy target. The method includes the steps of: determining desired image capture conditions for the capture of at least one two-dimensional radiographic image of the radiation therapy target using the three-dimensional planning image; detecting a position of the radiation therapy target in the at least one captured two-dimensional radiographic image; and determining a delivery of the radiation therapy in response to the radiation therapy target's detected position in the at least one captured two-dimensional radiographic image.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: November 18, 2008
    Assignee: Carestream Health, Inc.
    Inventors: Jay S. Schildkraut, Nathan D. Cahill, Sreeram Dhurjaty, Lawrence A. Ray
  • Publication number: 20070272873
    Abstract: A digital radiography detector includes a housing having first and second spaced planar members and four side walls defining a cavity. A radiographic image detector assembly is mounted within the cavity for converting a radiographic image to an electronic radiographic image. The detector assembly includes a detector array mounted on a stiffener. A shock absorbing elastomer assembly is located within the cavity for absorbing shock to the detector array/stiffener in directions perpendicular to and parallel to the detector array/stiffener.
    Type: Application
    Filed: May 26, 2006
    Publication date: November 29, 2007
    Inventors: Bradley S. Jadrich, Timothy A. Peter, Sreeram Dhurjaty, Jeffery R. Hawver, Mark D. Bedzyk
  • Patent number: 7211803
    Abstract: A wireless X-ray detector for a digital radiography system with remote detection of impinging radiation from the system X-ray source onto a sensor panel having amorphous or crystalline silicon photodiodes or metal insulated semiconductor (MIS) sensors. Changes in current in the photodiode bias supply circuit is sensed to generate a signal indicating presence of radiation. Improved detection of X-ray cessation is achieved either by leaving at least one line of sensors connected between the bias supply circuit to a virtual ground during charge accumulation or by using an X-ray presence detector circuit that increases the sensitivity of the detector circuit to bias circuit current changes occurring after onset of the radiation.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: May 1, 2007
    Assignee: Eastman Kodak Company
    Inventors: Sreeram Dhurjaty, John Yorkston
  • Patent number: 7211802
    Abstract: A wireless, independent digital imaging sensor utilizes an external charge balance capacitor to establish a sense voltage at a common node between the charge capacitor and the pixel intrinsic capacitors in the sensor panel. A variable width pulse train responds to the sense voltage to control injection of charge to the external capacitor to maintain a constant voltage at the common equal to a reference voltage. An increase in pulse width above a threshold level representative of the onset of X-ray exposure is detected to generate an output control signal used to control subsequent image acquisition functions of the imaging sensor.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: May 1, 2007
    Assignee: Eastman Kodak Company
    Inventors: Sreeram Dhurjaty, Gordon Geisbuesch, John Yorkston, Joshua M. Silbermann, Jeffery R. Hawver
  • Publication number: 20070023668
    Abstract: A low noise digital radiography image capture system employs a two-dimensional array of pixel sites in the image capture panel with each site having an analog-to-digital converter to digitize analog charge values produced by imaging radiation directly into corresponding digital data at the site prior to read-out to subsequent digital data processing electronics thereby avoiding noise and crosstalk problems associated with high frequency read-out of analog information. Fill factor problems caused by inclusion of integrated circuitry on the pixel site are minimized by inclusion of the A/D counter on the opposite side of the substrate support for the pixel site.
    Type: Application
    Filed: July 28, 2005
    Publication date: February 1, 2007
    Inventors: Sreeram Dhurjaty, Timothy Wojcik
  • Publication number: 20060182326
    Abstract: A method for delivering radiation therapy to a patient using a three-dimensional planning image for radiation therapy of the patient wherein the planning image includes a radiation therapy target. The method includes the steps of: determining desired image capture conditions for the capture of at least one two-dimensional radiographic image of the radiation therapy target using the three-dimensional planning image; detecting a position of the radiation therapy target in the at least one captured two-dimensional radiographic image; and determining a delivery of the radiation therapy in response to the radiation therapy target's detected position in the at least one captured two-dimensional radiographic image.
    Type: Application
    Filed: January 20, 2005
    Publication date: August 17, 2006
    Inventors: Jay Schildkraut, Nathan Cahill, Sreeram Dhurjaty, Lawrence Ray
  • Patent number: 6597949
    Abstract: A defibrillator which contains a device for producing alternating voltage, a power factor controller for converting the alternating voltage to a direct voltage, and a device for converting the direct voltage into a biphasic waveform voltage. The defibrillator also contains a device for sensing the electrical activity of a human heart and for allowing one to hear an audio signal corresponding to such activity.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: July 22, 2003
    Inventor: Sreeram Dhurjaty
  • Patent number: 6219083
    Abstract: A laser imaging system having a diode laser for producing a laser beam; a beamsplitter for splitting the laser beam into a laser writing portion and a feedback portion; a photodetector for detecting the feedback portion; a photodetector amplifier for amplifying the output of the photodetector; a sample and hold coupled to the photodetector amplifier; an integrator adder; an integrator for integrating the outputs of the photodetector amplifier and the sample and hold processed by the integrator adder; and a laser input circuit including a laser amplifier, a linear power signal provider, a threshold power signal provider, and a laser input adder for adding the laser power signal, the linear power signal, and the output of the integrator.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: April 17, 2001
    Assignee: Eastman Kodak Company
    Inventors: Sreeram Dhurjaty, Douglas Seim, Brian K. Rhoda
  • Patent number: 6031583
    Abstract: A high frequency video isolation circuit comprising: a modulating signal source for producing a modulating signal having a frequency of several hundred megahertz; an input multiplier for multiplying the modulating signal with an input video signal having frequency components in a frequency range from about several hertz to about one hundred or more megahertz, to produce a modulated video signal having frequency components in a frequency range from about one hundred megahertz to about several hundred megahertz; a first isolation transformer having an input and an output, for transforming the modulated video signal from the input to the output; and an output multiplier for multiplying the transformed modulated video signal with the modulating signal to produce an isolated output video signal having the frequency components of the input video signal.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: February 29, 2000
    Assignee: Eastman Kodak Company
    Inventors: Sreeram Dhurjaty, Martin E. Trzcinski
  • Patent number: 5764664
    Abstract: A laser imaging apparatus comprising:a laser diode which is always operable in a linear lasing region;an amplitude modulator for amplitude modulating said laser diode for a digital image signal applied to said laser diode, when said digital image signal has a code value in a first range of code values in the mid to high range of signal code values; anda high speed pulse width modulator for pulse width modulating said laser diode when said digital signal, which is applied to said laser diode, has a code value in a second range of code values below said first range of code values, said laser diode being operated at a constant predetermined power level which is above the threshold power level of said laser diode.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: June 9, 1998
    Assignee: Eastman Kodak Company
    Inventors: Kwok Leung Yip, Richard Frank Kerr, Sreeram Dhurjaty
  • Patent number: 5323018
    Abstract: Laser imaging apparatus includes a laser which produces a laser beam. An image media is scanned with a laser beam in a raster pattern to produce a scanned image. A photodetector converts the scanned image into an image signal. An amplifier amplifies the image signal and has varying gain. A control circuit controls the laser beam scanning device to scan image media of different sizes with laser beam raster patterns of different sizes. The control circuit includes detectors for detecting the size of the image media. The control circuit varies the gain of the amplifier as a function of the detected size of the scanned image media.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: June 21, 1994
    Assignee: Eastman Kodak Company
    Inventors: Michael K. Rogers, Sreeram Dhurjaty