Patents by Inventor Prabhu Soundarrajan

Prabhu Soundarrajan 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: 10401340
    Abstract: This application discloses a method and an apparatus for the measurement of gases in hydraulic fracking sites, comprising a gas sensor, a computer, and a correction factor wherein the correction factor is applied to the observed gas reading to generate a more accurate reading of the gas level at the site.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: September 3, 2019
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Prabhu Soundarrajan, Viktor Konovalov
  • Patent number: 9459235
    Abstract: An integrated sensor of volatile organic gas can include a photoionization detector (PID) and one or more additional detectors such as an infrared detector, a catalytic combustion detector, or an electrochemical detector. One embodiment includes a methane detector that allows correction of the PID measurements for the interference of methane with the PID and/or allows a combination of measurements of the sensors to measure a total hydrocarbon concentration. A further sensor of non-hydrocarbon quenching gases such as carbon dioxide may also be used in correction of the PID measurements.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: October 4, 2016
    Assignee: Honeywell International Inc.
    Inventors: Prabhu Soundarrajan, Peter C. Hsi
  • Patent number: 9176107
    Abstract: A method for analyzing gas dissolved within a fluid filled asset includes extracting the fluid from the fluid filled asset, circulating the fluid though a first fluid loop, and passing the extracted fluid along a first side of a gas permeable membrane. Gas is extracted from a second side of the gas permeable membrane and the extracted gas is circulated through a second fluid loop. The first fluid loop and the second fluid loop are separated by the gas permeable membrane. The method further includes controlling a pressure differential across the gas permeable membrane to a predetermined pressure differential and providing the extracted gas to a gas analysis unit located within the second fluid loop. The chemical makeup of the extracted gas is periodically determined using the gas analysis unit.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: November 3, 2015
    Assignee: LumaSense Technologies Holdings, Inc.
    Inventors: John Paul Jeffrey, Anastasia Rude, Brett Sargent, Eric Wertz, Jeffrey Headrick, Terry M. Stapleton, Prabhu Soundarrajan
  • Publication number: 20150219609
    Abstract: This application discloses a method and an apparatus for the measurement of gases in hydraulic fracking sites, comprising a gas sensor, a computer, and a correction factor wherein the correction factor is applied to the observed gas reading to generate a more accurate reading of the gas level at the site.
    Type: Application
    Filed: December 19, 2014
    Publication date: August 6, 2015
    Inventors: Prabhu Soundarrajan, Viktor Konovalov
  • Patent number: 8903474
    Abstract: Systems and techniques for the analysis of gases for medical purposes are described. In one aspect, a system includes a sample collector to collect a physical sample associated with an individual and present a gas sample for analysis, a gas analysis device to analyze the gas sample presented by the sample collector to determine a concentration of one or more non-aqueous gases in the gas sample, a data storage device that includes information reflecting a correlation between concentration of the one or more non-aqueous gases in the gas sample and a disease state, and a data analysis device to determine a medical condition of the individual based on the concentration of one or more non-aqueous gases in the gas sample and the information.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: December 2, 2014
    Assignee: PEN Inc.
    Inventors: Zvi Yaniv, Prabhu Soundarrajan
  • Publication number: 20140097853
    Abstract: An integrated sensor of volatile organic gas can include a photoionization detector (PID) and one or more additional detectors such as an infrared detector, a catalytic combustion detector, or an electrochemical detector. One embodiment includes a methane detector that allows correction of the PID measurements for the interference of methane with the PID and/or allows a combination of measurements of the sensors to measure a total hydrocarbon concentration. A further sensor of non-hydrocarbon quenching gases such as carbon dioxide may also be used in correction of the PID measurements.
    Type: Application
    Filed: October 4, 2013
    Publication date: April 10, 2014
    Applicant: RAE Systems, Inc.
    Inventors: Prabhu Soundarrajan, Peter C. Hsi
  • Publication number: 20140053626
    Abstract: A method for analyzing gas dissolved within a fluid filled asset includes extracting the fluid from the fluid filled asset, circulating the fluid though a first fluid loop, and passing the extracted fluid along a first side of a gas permeable membrane. Gas is extracted from a second side of the gas permeable membrane and the extracted gas is circulated through a second fluid loop. The first fluid loop and the second fluid loop are separated by the gas permeable membrane. The method further includes controlling a pressure differential across the gas permeable membrane to a predetermined pressure differential and providing the extracted gas to a gas analysis unit located within the second fluid loop. The chemical makeup of the extracted gas is periodically determined using the gas analysis unit.
    Type: Application
    Filed: February 1, 2012
    Publication date: February 27, 2014
    Applicant: LUMASENSE TECHNOLOGIES HOLDINGS, INC.
    Inventors: John Paul Jeffrey, Anastasia Rude, Brett Sargent, Eric Wertz, Jeffrey Headrick, Terry M. Stapleton, Prabhu Soundarrajan
  • Publication number: 20120266653
    Abstract: Systems and techniques for the analysis of gases for medical purposes are described. In one aspect, a system includes a sample collector to collect a physical sample associated with an individual and present a gas sample for analysis, a gas analysis device to analyze the gas sample presented by the sample collector to determine a concentration of one or more non-aqueous gases in the gas sample, a data storage device that includes information reflecting a correlation between concentration of the one or more non-aqueous gases in the gas sample and a disease state, and a data analysis device to determine a medical condition of the individual based on the concentration of one or more non-aqueous gases in the gas sample and the information.
    Type: Application
    Filed: June 28, 2012
    Publication date: October 25, 2012
    Applicant: APPLIED NANOTECH HOLDINGS, INC.
    Inventors: ZVI YANIV, PRABHU SOUNDARRAJAN
  • Patent number: 7950271
    Abstract: An apparatus for sensing an analyte gas is provided. The apparatus may include a signal amplifier that may include a thin film transistor that may include a semiconducting film that may include a metal oxide capable of chemical interaction with the analyte gas, such as carbon monoxide. The apparatus may be tuned for detecting the analyte gas by varying the gate voltage of the transistor.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: May 31, 2011
    Assignee: Applied Nanotech Holdings, Inc.
    Inventors: James Novak, Prabhu Soundarrajan
  • Patent number: 7879131
    Abstract: A process for encapsulating metal microparticles in a pH sensitive polymer matrix using a suspension containing the polymer. The process first disperses the metal particles in a polymeric solution consisting of a pH sensitive polymer. The particles are then encapsulated in the form of micro-spheres of about 5-10 microns in diameter comprising the pH sensitive polymer and the metal ions (Ni2+, Cu2+) to be coated. The encapsulated matrix includes first metal particles homogeneously dispersed in a pH sensitive matrix, comprising the second metal ions. A high shear homogenization process ensures homogenization of the aqueous mixture resulting in uniform particle encapsulation. The encapsulated powder may be formed using spray drying. The powder may be then coated in a controlled aqueous media using an electroless deposition process. The polymer is removed when the encapsulated micro-spheres encounter a pH change in the aqueous solution.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: February 1, 2011
    Assignee: Applied Nanotech Holdings, Inc.
    Inventors: Zvi Yaniv, Prabhu Soundarrajan
  • Patent number: 7762121
    Abstract: A hydrogen sensor and/or switch fabricated from an array of nanowires or a nanoparticle thick film composed of metal or metal alloys. The sensor and/or switch demonstrates a wide operating temperature range and shortened response time due to fabrication materials and methods. The nanowires or nanoparticle thick films demonstrate an increase in conductivity in the presence of hydrogen.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: July 27, 2010
    Assignee: Applied Nanotech Holdings, Inc.
    Inventors: Kwok Ng, Greg Monty, Yunjun Li, Zvi Yaniv, Prabhu Soundarrajan
  • Patent number: 7695609
    Abstract: The present invention is directed to systems and methods for detecting biological and chemical species in liquid and gaseous phase. The systems and methods utilize carbon nanotubes to enhance sensitivity and selectivity towards the reacting species by decreasing interference and detecting a wide range of concentrations.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: April 13, 2010
    Assignee: Applied Nanotech Holdings, Inc.
    Inventors: Prabhu Soundarrajan, James Novak
  • Publication number: 20100005853
    Abstract: A device for sensing hydrogen based on palladium or palladium alloy nanoparticles, wherein the nanoparticles are deposited on a resistive substrate, to permit sensing of less than 1% hydrogen; wherein the nanoparticles are deposited as islands on a continuous resistive layer.
    Type: Application
    Filed: August 3, 2006
    Publication date: January 14, 2010
    Applicant: NANO-PROPRIETARY, INC.
    Inventors: Thomas Visel, Prabhu Soundarrajan, Igor Pavlovsky, Mohshi Yang
  • Publication number: 20090301879
    Abstract: A protective coating sustains the long term performance of a solid-state hydrogen sensor that includes a catalyst layer for promoting the electrochemical dissociation of hydrogen. The catalyst is susceptible to deterioration in the presence of at least one contaminant, including carbon monoxide, hydrogen sulfide, chlorine, water and oxygen. The coating comprises at least one layer of silicon dioxide having a thickness that permits hydrogen to diffuse to the catalyst layer and that inhibits contaminant(s) from diffusing to the catalyst layer. The preferred coating further comprises at least one layer of a hydrophobic composition, preferably polytetrafluoroethylene, for inhibiting diffusion of water through the protective coating to the catalyst layer. The preferred protective coating further comprising at least one layer of alumina for inhibiting diffusion of oxygen through the protective coating to said catalyst layer.
    Type: Application
    Filed: April 6, 2009
    Publication date: December 10, 2009
    Inventors: Prabhu Soundarrajan, An T. Nguyen Le, Todd E. Wilke
  • Publication number: 20090256215
    Abstract: An apparatus for sensing an analyte gas is provided. The apparatus may include a signal amplifier that may include a thin film transistor that may include a semiconducting film that may include a metal oxide capable of chemical interaction with the analyte gas, such as carbon monoxide. The apparatus may be tuned for detecting the analyte gas by varying the gate voltage of the transistor.
    Type: Application
    Filed: April 15, 2008
    Publication date: October 15, 2009
    Applicant: NANO-PROPRIETARY, INC.
    Inventors: James Novak, Prabhu Soundarrajan
  • Patent number: 7597788
    Abstract: A gas sensing mechanism and a gas sensor based on a semiconducting carbon nanotube diode structure are disclosed. The gas sensor operates by detecting the change in conductivity characteristic of the current vs. voltage behavior of an I—N, or I—P junction, in the carbon nanotube. In the presence of electrophilic gas species at the I—N junction, or nucleophilic gas species at the I—P junction, a P—N, or N—P, junction is created by doping of the carbon nanotube by the respective gas species. The resulting change from the undoped, instrinsic i-type to p-type, or n-type, creates a diode structure whose conductivity characteristics can be measured with high accuracy and selectivity.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: October 6, 2009
    Assignee: Applied Nanotech Holdings, Inc.
    Inventors: Thomas Visel, Prabhu Soundarrajan
  • Patent number: 7575720
    Abstract: A method for electronically detecting an electrostatic based biological binding event. This same binding event can be detected optically via complicated experimental setups. A balanced coil system is incorporated into a hand held unit with a plug-in chip. The chip may further be made to act like an array with a different surface molecule for detection of different bio-molecules.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: August 18, 2009
    Assignee: Applied Nanotech Holdings, Inc.
    Inventors: James Novak, Prabhu Soundarrajan, Alexei Tikhonski, Zvi Yaniv
  • Publication number: 20090133474
    Abstract: A hydrogen sensor and/or switch fabricated from an array of nanowires or a nanoparticle thick film composed of metal or metal alloys. The sensor and/or switch demonstrates a wide operating temperature range and shortened response time due to fabrication materials and methods. The nanowires or nanoparticle thick films demonstrate an increase in conductivity in the presence of hydrogen.
    Type: Application
    Filed: October 30, 2007
    Publication date: May 28, 2009
    Applicant: NANO-PROPRIETARY, INC.
    Inventors: KWOK NG, GREG MONTY, YUNJUN LI, ZVI YANIV, PRABHU SOUNDARRAJAN
  • Publication number: 20080302676
    Abstract: The present invention is directed to systems and methods for detecting biological and chemical species in liquid and gaseous phase. The systems and methods utilize carbon nanotubes to enhance sensitivity and selectivity towards the reacting species by decreasing interference and detecting a wide range of concentrations.
    Type: Application
    Filed: June 5, 2008
    Publication date: December 11, 2008
    Applicant: Nano-Proprietary, Inc.
    Inventors: Prabhu Soundarrajan, James P. Novak
  • Patent number: D711257
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 19, 2014
    Assignee: LumaSense Technologies Holdings, Inc.
    Inventors: Brett Sargent, Prabhu Soundarrajan, Rick Lewis