By Means Of A Solid Body In Contact With A Fluid Patents (Class 436/151)
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Patent number: 12114975Abstract: Various examples are directed to systems and methods for operating an analyte sensor system using sensor electronics. An example method may comprise applying a bias voltage change to an analyte sensor bias voltage and measuring a current value for each of a plurality of time periods after application of the bias voltage change. The example method may also comprise determining an estimated impedance using the current values for the plurality of time periods and determining a characteristic of the analyte sensor using the estimated impedance. The example method may further comprise receiving from the analyte sensor a signal indicative of an analyte concentration, and determining an estimated analyte concentration level using the determined characteristic of the analyte sensor and the received signal.Type: GrantFiled: December 27, 2019Date of Patent: October 15, 2024Assignee: Dexcom, Inc.Inventors: Sebastian Bohm, Anna Claire Harley-Trochimczyk, Daiting Rong, Rui Ma, Wenjie Lan, Minglian Shi, Disha B. Sheth
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Patent number: 12104516Abstract: A method for controlling a SCR catalytic converter of a vehicle, comprising a first step of modelling said at least one SCR catalytic converter as a plurality of NH3 storage cells (cell1, cell2, . . . , celln; cell1, cell2 . . . celln, cell1, cell2, . . . , celln), a second step of controlling only a first (cell1) of said plurality of storage cells, according to feedback control based on a reference value, and a third step of adapting said reference value on the basis of a storage level of at least another storage cell of said plurality of storage cells, wherein said first storage cell is arranged at an inlet of said SCR catalytic converter according an exhaust gas circulation.Type: GrantFiled: December 17, 2019Date of Patent: October 1, 2024Assignee: FPT MOTORENFORSCHUNG AGInventor: Michael Abt
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Patent number: 12055507Abstract: To extend the life of a MEMS gas sensor, the MEMS gas sensor includes an insulator, a gas sensitive material, a first oxide film and an interlayer insulating film, a heater wiring pattern, a lower protective film, and an upper protective film. The insulator includes a cavity. The gas sensitive material is provided corresponding to the cavity. The first oxide film and the interlayer insulating film are provided on the insulator and arranged to overlap each other in a plan view. The heater wiring pattern serves to heat the gas sensitive material and is disposed between the first oxide film and the interlayer insulating film. The lower protective film and the upper protective film cover, in direct contact, an upper surface, a lower surface, and a side surface of the heater wiring pattern.Type: GrantFiled: August 28, 2019Date of Patent: August 6, 2024Assignee: NISSHA CO., LTD.Inventors: Teppei Kimura, Hiroaki Suzuki, Kazuo Terasawa
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Patent number: 11994485Abstract: A method for operating a gas sensor device, which is equipped with at least one gas-sensitive electrical sensor resistor, a heating element for the controlled heating of the sensor resistor, a detection element for detecting the resistance value of the sensor resistor, and a signal processing element for processing measuring signals. In the method, measurements are carried out in time intervals, in which the resistance value of the sensor resistor is detected as a measuring signal, and the sensor resistor is heated for each measurement, the heating element being operated discontinuously in heating intervals and each measurement being assigned a heating interval. Measurements are automatically carried out in predefinable time intervals, and additional measurements are initiatable at arbitrary times. The duration of the heating intervals assigned to the individual measurements being selected as a function of the time interval to the preceding heating interval.Type: GrantFiled: October 10, 2018Date of Patent: May 28, 2024Assignee: ROBERT BOSCH GMBHInventors: Alexandros Ninos, Thomas Claus, Ye Lu, Christoph Brueser
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Patent number: 11971380Abstract: A pump device has at least one chamber (22) or conduit containing or provided for containing a liquid, a concentration sensor (24) arranged in the chamber (22) or conduit for detecting a concentration of a substance in the liquid and an evaluation unit (28) connected to the sensor (24). The sensor (24) and the evaluation unit (28) are configured for an electrical impedance measurement. The evaluation unit (28) is configured such that a measurement for detecting the concentration is carried out by use of an electrical signal applied to the sensor (24) having at least one frequency corresponding to or above an upper cut-off frequency (f2) of a frequency range showing a constant electrical impedance (Rm). A method is provided for determining the concentration of a substance inside a liquid.Type: GrantFiled: February 26, 2020Date of Patent: April 30, 2024Assignee: GRUNDFOS HOLDING A/SInventors: Gert Friis Eriksen, Jørgen Jensen
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Patent number: 11959133Abstract: The present disclosure generally relates to the methods and compositions to efficiently analyze polymer characteristics using nanopore-based assays. Specifically disclosed is a method for generating reference signals for polymer analysis in a nanopore system, wherein the nanopore system has a multi-subunit output signal resolution. The method comprises translocating a reference sequence through a nanopore to generate a plurality of reference output signals, wherein each possible multi-subunit sequence that can determine an output signal appears only once in the reference sequence. The output signals are compiled into a reference map for nanopore analysis of an analyte polymer. Also provided are methods and compositions for calibrating the nanopore system for optimized polymer analysis.Type: GrantFiled: March 19, 2020Date of Patent: April 16, 2024Assignee: University of Washington Through Its Center for CommercializationInventors: Jens Gundlach, Ian M. Derrington, Andrew Laszlo, Elizabeth Manrao
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Patent number: 11867562Abstract: An optical device is provided. The optical device includes a time-of-flight (TOF) sensor array, a photon conversion thin film, and a light source. The photon conversion thin film is disposed above the time-of-flight sensor array. The light source emits light with a first wavelength towards the photon conversion thin film to be converted into light with a second wavelength received by the time-of-flight sensor array. The second wavelength is longer than the first wavelength.Type: GrantFiled: January 25, 2022Date of Patent: January 9, 2024Assignee: VISERA TECHNOLOGIES COMPANY LIMITEDInventors: Lai-Hung Lai, Chin-Chuan Hsieh, Chien-Ho Yu
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Patent number: 11802863Abstract: An oil condition determination system includes a resistance value measurement unit and a determination unit. The resistance value measurement unit applies a measurement voltage between a pair of measurement electrodes in contact with oil to measure a resistance value of the oil. The determination unit determines, when a change tendency of the resistance value of the oil is reversed, that condition of the oil is changed.Type: GrantFiled: January 30, 2019Date of Patent: October 31, 2023Assignee: NIPPON PILLAR PACKING CO., LTD.Inventors: Masatoshi Sasaki, Yasuteru Asakawa, Tomomi Honda, Tatsunari Koyama, Akira Nakatsu
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Patent number: 11624715Abstract: A NEMS readout system includes a sensor array comprising a plurality of sensors. Each sensor of the plurality of sensors including a resonator with frequency characteristics different from the resonator of each other sensor of the plurality of sensors. A readout signal indicative of a plurality of output signals is collected from the sensor array. Each output signal of the plurality of output signals corresponding to one of the plurality of sensors. An analysis of the plurality of output signals is performed to identify a plurality of resonant frequencies and to detect a frequency shift associated with at least one of the plurality of resonant frequencies.Type: GrantFiled: October 27, 2021Date of Patent: April 11, 2023Assignee: California Institute of TechnologyInventors: Michael L. Roukes, Chung Wah Fon, Ewa Rej
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Patent number: 11237098Abstract: A MEMS gas sensor includes a photoacoustic sensor including a thermal emitter and an acoustic transducer, the thermal emitter and the acoustic transducer being inside a mutual measurement cavity. The thermal emitter includes a semiconductor substrate and a heating structure supported by the semiconductor substrate. The heating structure includes a heating element. The MEMS gas sensor further includes a chemical sensor thermally coupled to the heating element, and the chemical sensor including a gas adsorbing layer.Type: GrantFiled: January 28, 2020Date of Patent: February 1, 2022Assignee: INFINEON TECHNOLOGIES AGInventor: David Tumpold
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Patent number: 11009474Abstract: The present disclosure is directed to a gas sensor device that includes a plurality of gas sensors. Each of the gas sensors includes a semiconductor metal oxide (SMO) film, a heater, and a temperature sensor. Each of the SMO films is designed to be sensitive to a different gas concentration range. As a result, the gas sensor device is able to obtain accurate readings for a wide range of gas concentration levels. In addition, the gas sensors are selectively activated and deactivated based on a current gas concentration detected by the gas sensor device. Thus, the gas sensor device is able to conserve power as gas sensors are on when appropriate instead of being continuously on.Type: GrantFiled: December 12, 2018Date of Patent: May 18, 2021Assignee: STMICROELECTRONICS PTE LTDInventors: Malek Brahem, Hatem Majeri, Olivier Le Neel, Ravi Shankar
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Patent number: 10732097Abstract: A photothermal interferometry apparatus and method for detecting a molecule in a sample, in particular for detecting a trace gas species, comprising: a Fabry-Perot interferometer with a first mirror, a second mirror and a first cavity for containing the sample extending between the first and the second mirror, a probe laser for passing a probe laser beam through the first cavity of the Fabry-Perot interferometer, an excitation laser for passing an excitation laser beam through the first cavity of the Fabry-Perot interferometer for exciting the molecule in the sample, and a photodetector unit for detecting the transmitted probe laser beam passed through the first cavity of the Fabry-Perot interferometer.Type: GrantFiled: July 12, 2017Date of Patent: August 4, 2020Assignee: TECHNISCHE UNIVERSITÄT WIENInventors: Johannes Paul Waclawek, Bernhard Lendl
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Patent number: 10330637Abstract: A system and method for chemical sensing of multiple gases or vapors with an array of chemical sensitive field effect transistor (CS-FET) devices that are highly sensitive, small in size and have low energy consumption. The sensor layer is an ultrathin film of transition metal oxide, rare earth metal oxide or metal nanoparticles that is formed between the source and drain electrodes on a silicon substrate. The work functions of the sensor layer can be manipulated by the adsorption of chemicals onto their surfaces. These changes cause a change in the surface potential of the underlying Si channel, leading to the current modulation of the devices. By selecting appropriate sensor layers, different chemicals will produce different output signals. External signal processing of these signals enables and sensor and array profile matching permits multi-gas detection.Type: GrantFiled: December 1, 2016Date of Patent: June 25, 2019Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Ali Javey, Hiroshi Shiraki, Hossain Fahad
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Patent number: 10175221Abstract: A detection device for detecting a marker in a liquid, preferably a fuel, comprising: a reaction chamber 5, provided with a de-dopable conductive polymer 6 building a path between two conductive pads 10 connected to a resistivity measurement device, wherein the de-dopable conductive polymer 6 is able to be de-doped by a chemical reaction with the marker, changing its resistivity.Type: GrantFiled: September 25, 2015Date of Patent: January 8, 2019Assignee: SICPA HOLDING SAInventor: Davide Ciampini
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Patent number: 9775374Abstract: The present disclosure relates to methods and systems for calculating a food additive. A first method includes identifying chemical compounds of an averse food ingredient, identifying chemical compounds of a flavorful food ingredient and calculating a set of chemical compounds for the food additive such that an olfactory perception of a mixture of the averse food ingredient, the flavorful food ingredient and the food additive is the same as an olfactory perception of only the flavorful food ingredient. A first device includes a database storing information identifying chemical compounds of an averse food ingredient and identifying chemical compounds of a flavorful food ingredient, and a processor for calculating a food additive such that an olfactory perception of flavors of a mixture of the averse food ingredient, the flavorful food ingredient and the food additive is the same as an olfactory perception of only the flavorful food ingredient.Type: GrantFiled: August 3, 2016Date of Patent: October 3, 2017Assignee: International Business Machines CorporationInventors: Kush R. Varshney, Lav R. Varshney
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Patent number: 9470668Abstract: The present disclosure relates to methods and systems for calculating a food additive. A first method includes identifying chemical compounds of an averse food ingredient, identifying chemical compounds of a flavorful food ingredient and calculating a set of chemical compounds for the food additive such that an olfactory perception of a mixture of the averse food ingredient, the flavorful food ingredient and the food additive is the same as an olfactory perception of only the flavorful food ingredient. A first device includes a database storing information identifying chemical compounds of an averse food ingredient and identifying chemical compounds of a flavorful food ingredient, and a processor for calculating a food additive such that an olfactory perception of flavors of a mixture of the averse food ingredient, the flavorful food ingredient and the food additive is the same as an olfactory perception of only the flavorful food ingredient.Type: GrantFiled: October 22, 2013Date of Patent: October 18, 2016Assignee: International Business Machines CorporationInventors: Kush R. Varshney, Lav R. Varshney
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Patent number: 9459224Abstract: A gas sensor includes a substrate, a heater, a dielectric layer, a sensing electrode, and a gas sensitive film. The substrate has a sensing region and a peripheral region surrounding the sensing region, and the substrate further has an opening disposed in the sensing region. The heater is disposed at least above the opening, and the heater has an electrical resistivity larger than about 6×10?8 ohm-m. The dielectric layer is disposed on the heater. The sensing electrode is disposed on the dielectric layer. The gas sensitive film is disposed on the sensing electrode.Type: GrantFiled: June 30, 2015Date of Patent: October 4, 2016Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.Inventors: Chun-Wen Cheng, Chia-Hua Chu, Fei-Lung Lai, Shiang-Chi Lin
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Patent number: 9353621Abstract: A gas extraction system for gas analysis is provided. The gas extraction system includes the use of a peristaltic pump for moving condensates to a liquid trap assembly. An improved fluid flow is thus provided, which includes delivering condensate from a condensate separator to a peristaltic pump and delivering the condensate from the peristaltic pump to a liquid trap assembly.Type: GrantFiled: September 18, 2014Date of Patent: May 31, 2016Assignee: HALLIBURTON ENERGY SERVICES, INC.Inventor: Neil Patrick Schexnaider
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Patent number: 9255920Abstract: Disclosed is a sensor for detecting a target material. The sensor includes a ferromagnetic metal and a molecular recognition reagent coupled to the ferromagnetic metal. The molecular recognition reagent is operable to expand upon exposure to vapor or liquid from the target material such that the molecular recognition reagent changes a tensile stress upon the ferromagnetic metal. The target material is detected based on changes in the magnetic switching characteristics of the ferromagnetic metal caused by the changes in the tensile stress.Type: GrantFiled: September 23, 2014Date of Patent: February 9, 2016Assignees: Consolidated Nuclear Security, LLC, University of Tennessee Research FoundationInventors: Vincent E. Lamberti, Layton N. Howell, Jr., David K. Mee, Michael J. Sepaniak
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Patent number: 9097677Abstract: In one embodiment, a magnetic gas sensor includes a first ferromagnetic layer, a second ferromagnetic layer, and a gas-sensitive metallic interlayer positioned between the first and second ferromagnetic layers, wherein at least one physical property of the metallic interlayer changes in the presence of a gas that is to be detected, wherein a magnetic coupling between the first and second ferromagnetic layers, and a magnetic state of the sensor, can change depending upon the state of the physical property of the metallic interlayer.Type: GrantFiled: June 19, 2014Date of Patent: August 4, 2015Assignee: University of South FloridaInventor: Casey William Miller
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Publication number: 20150140560Abstract: The disclosure provides a label-free viscosity-based analyte detection system using paramagnetic beads as an asynchronous magnetic bead rotation (AMBR) microviscometer. It is disclosed herein that the bead rotation period is linearly proportional to the viscosity of a solution comprising analytes surrounding the paramagnetic bead. Optical measurement of asynchronous microbead motion determines solution viscosity precisely in microscale volumes, thus allowing an estimate of analyte concentration. The results demonstrate the feasibility of viscosity-based analyte detection using AMBR in microscale aqueous volumes.Type: ApplicationFiled: November 4, 2014Publication date: May 21, 2015Inventors: Raoul Kopelman, Mark A. Burns, Yunzi Li
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Publication number: 20150017735Abstract: A biosensor includes a detection element having an analyte detecting portion which is monotonically increased in mass in response to detection of an analyte; a reference element having a reference measuring portion which exhibits no reactivity to the analyte; a mixer which mixes a detection signal responsive to mass variations in the analyte detecting portion from the detection element and a reference signal from the reference element; a measurement which calculates two candidate phase-change values of a positive value and a negative value, from a signal mixed by the mixer in accordance with a heterodyne system, and determines a phase-change value from the two candidate phase change value by judging whether the phase is positive or negative based on temporal changes in signal strength; and a detection amount calculation portion which calculates a detection amount of the analyte based on the phase change value determined by the measurement portion.Type: ApplicationFiled: January 29, 2013Publication date: January 15, 2015Inventor: Hiroshi Katta
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Patent number: 8932871Abstract: A system for a vehicle includes a first ozone sensor that generates a first sensor signal indicating a first amount of ozone in air flowing into a radiator. A second ozone sensor generates a second sensor signal indicating a second amount of ozone in air flowing out of the radiator. A control module receives the first sensor signal and the second sensor signal and determines an ozone conversion rate based on the first sensor signal and the second sensor signal.Type: GrantFiled: November 8, 2011Date of Patent: January 13, 2015Inventors: Scott H. Wittkopp, Chang H. Kim, Brian T. Heil
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Patent number: 8912005Abstract: An array of sensors arranged in matched pairs of transistors with an output formed on a first transistor and a sensor formed on the second transistor of the matched pair. The matched pairs are arranged such that the second transistor in the matched pair is read through the output of the first transistor in the matched pair. The first transistor in the matched pair is forced into the saturation (active) region to prevent interference from the second transistor on the output of the first transistor. A sample is taken of the output. The first transistor is then placed into the linear region allowing the sensor formed on the second transistor to be read through the output of the first transistor. A sample is taken from the output of the sensor reading of the second transistor. A difference is formed of the two samples.Type: GrantFiled: July 17, 2014Date of Patent: December 16, 2014Assignee: Life Technologies CorporationInventors: Keith G. Fife, Jungwook Yang
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Patent number: 8912006Abstract: This application provides devices for modeling ischemic stroke conditions. The devices can be used to culture neurons and to subject a first population of the neurons to low-oxygen conditions and a second population of neurons to normoxic conditions. The neurons are cultured on a porous barrier, and on the other side of the barrier run one or more fluid-filled channels. By flowing fluid with different oxygen levels through the channels, one can deliver desired oxygen concentrations to the cells nearest those channels.Type: GrantFiled: February 4, 2013Date of Patent: December 16, 2014Assignees: The Charles Stark Draper Laboratory, Inc., The University of South FloridaInventors: Anilkumar Harapanahalli Achyuta, Javier Cuevas, Shivshankar Sundaram, Chris Katnik
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Patent number: 8906695Abstract: In general, the present disclosure is directed toward a novel hybrid spintronic device for converting chemical absorption into a change in magnetoresistance. This device uses a novel magnetic material which depends on the attachment of an organic structure to a metallic film for its magnetism. Changes in the chemical environment lead to absorption on the surface of this organometallic bilayer and thus modify its magnetic properties. The change in magnetic properties, in turn, leads to a change in the resistance of a magnetoresistive structure or a spin transistor structure, allowing a standard electrical detection of the chemical change in the sensor surface.Type: GrantFiled: January 2, 2013Date of Patent: December 9, 2014Assignee: University of South CarolinaInventors: Thomas M. Crawford, Samir Y. Garzon
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Publication number: 20140342463Abstract: In general, the present disclosure is directed toward a novel hybrid spintronic device for converting chemical absorption into a change in magnetoresistance. This device uses a novel magnetic material which depends on the attachment of an organic structure to a metallic film for its magnetism. Changes in the chemical environment lead to absorption on the surface of this organometallic bilayer and thus modify its magnetic properties. The change in magnetic properties, in turn, leads to a change in the resistance of a magnetoresistive structure or a spin transistor structure, allowing a standard electrical detection of the chemical change in the sensor surface.Type: ApplicationFiled: January 2, 2013Publication date: November 20, 2014Applicant: UNIVERSITY OF SOUTH CAROLINAInventor: UNIVERSITY OF SOUTH CAROLINA
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Patent number: 8877510Abstract: A cartridge device having a receiving portion for receiving a blood sample and a jack portion for receiving a plug; a stirring device for circulating the blood sample within the receiving portion; and an electrode holder having at least one incorporated electrode wire pair; wherein the electrode holder is attachable to the cell such that one end of the at least one electrode wire pair forms a sensor unit for measuring the electrical impedance between the two electrode wires of the at least one electrode wire pair within the blood sample and that the opposite end of the at least one electrode wire pair forms a plug portion being connectable directly to the plug for an electrical connection of the sensor unit to an analyzer.Type: GrantFiled: November 22, 2013Date of Patent: November 4, 2014Assignee: F. Hoffmann-La Roche AGInventors: Andreas Calatzis, Ben Krüger, Marc Wittwer
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Patent number: 8871523Abstract: Disclosed is a sensor for detecting explosive devices. The sensor includes a ferromagnetic metal and a molecular recognition reagent coupled to the ferromagnetic metal. The molecular recognition reagent is operable to expand upon absorption of vapor from an explosive material such that the molecular recognition reagent changes a tensile stress upon the ferromagnetic metal. The explosive device is detected based on changes in the magnetic switching characteristics of the ferromagnetic metal caused by the tensile stress.Type: GrantFiled: March 15, 2013Date of Patent: October 28, 2014Assignee: Consolidated Nuclear Security, LLCInventors: Vincent E. Lamberti, Layton N. Howell, Jr., David K. Mee, Michael J. Sepaniak
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Patent number: 8859293Abstract: A method of measuring an analyte in a biological fluid comprises applying an excitation signal having a DC component and an AC component. The AC and DC responses are measured; a corrected DC response is determined using the AC response; and a concentration of the analyte is determined based upon the corrected DC response. Other methods and devices are disclosed.Type: GrantFiled: June 2, 2011Date of Patent: October 14, 2014Assignees: Roche Diagnostics Operations, Inc., Roche Operations Ltd.Inventors: David W. Burke, Lance S. Kuhn, James Maxwell
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Patent number: 8852950Abstract: A method for determining an NOx concentration in a measurement gas is provided, where a measurement value for the NOx concentration is determined from the sensor signal of a gas sensor and a measurement value for the concentration of a second component in the measurement gas is determined. A corrected value for the NOx in the measurement gas is determined from the measurement values, and the measurement value and the corrected measurement value for the NOx concentration are displayed and/or output.Type: GrantFiled: September 3, 2008Date of Patent: October 7, 2014Assignee: Testo AGInventors: Knut Hoyer, Andreas Kaufmann, Reinhold Munch, Thomas Springmann
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Publication number: 20140273259Abstract: A method of making a low-dimensional material chemical vapor sensor comprising exfoliating MoS2, applying the monolayer flakes of MoS2 onto a SiO2/Si wafer, applying a methylmethacrylate (MMA)/polymethylmethacrylate (PMMA) film, defining trenches for the deposition of metal contacts, and depositing one of Ti/Au, Au, and Pt in the trench and resulting in a MoS2 sensor. A low-dimensional material chemical vapor sensor comprising monolayer flakes of MoS2, trenches in the SiO2/Si wafer, metal contacts in the trenches, and thereby resulting in a MoS2 sensor. A full spectrum sensing suite comprising similarly fabricated parallel sensors made from a variety of low-dimensional materials including graphene, carbon nanotubes, MoS2, BN, and the family of transition metal dichalcogenides. The sensing suites are small, robust, sensitive, low-power, inexpensive, and fast in their response to chemical vapor analytes.Type: ApplicationFiled: November 8, 2013Publication date: September 18, 2014Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Adam L. Friedman, F. Keith Perkins, Enrique Cobas, Paul M. Campbell, Glenn G. Jernigan, Berend T. Jonker
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Patent number: 8815178Abstract: The invention relates to a device and method for non-invasive detection of an analyte in a fluid sample. In one embodiment, the device comprises: a collection chamber containing an absorbent hydrogel material; a fluidic channel connected to the collection chamber; a sensing chamber connected to the fluidic channel, wherein the device is comprised of a compressible housing that allows transfer of fluid collected by the collection chamber to be transferred to be extracted and withdrawn to the sensing chamber upon compression of the device, wherein the sensing chamber contains a material that specifically detects the analyte and wherein the sensing chamber is operably linked to a processor containing a potentiostat that allows detection of the analyte using electrochemical sensing.Type: GrantFiled: March 25, 2010Date of Patent: August 26, 2014Assignee: Arizona Board of Regents on Behalf of Arizona State UniversityInventors: Daniel Bishop, Jeffrey La Belle
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Patent number: 8796036Abstract: An array of sensors arranged in matched pairs of transistors with an output formed on a first transistor and a sensor formed on the second transistor of the matched pair. The matched pairs are arranged such that the second transistor in the matched pair is read through the output of the first transistor in the matched pair. The first transistor in the matched pair is forced into the saturation (active) region to prevent interference from the second transistor on the output of the first transistor. A sample is taken of the output. The first transistor is then placed into the linear region allowing the sensor formed on the second transistor to be read through the output of the first transistor. A sample is taken from the output of the sensor reading of the second transistor. A difference is formed of the two samples.Type: GrantFiled: June 30, 2011Date of Patent: August 5, 2014Assignee: Life Technologies CorporationInventors: Keith Fife, Jungwook Yang
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Publication number: 20140199774Abstract: A wireless chemical sensor includes an electrical conductor and a material separated therefrom by an electric insulator. The electrical conductor is an unconnected open-circuit shaped for storage of an electric field and a magnetic field. In the presence of a time-varying magnetic field, the first electrical conductor resonates to generate harmonic electric and magnetic field responses. The material is positioned at a location lying within at least one of the electric and magnetic field responses so-generated. The material changes in electrical conductivity in the presence of a chemical-of-interest.Type: ApplicationFiled: March 17, 2014Publication date: July 17, 2014Inventors: Stanley E. Woodard, Donald M. Oglesby, Bryant D. Taylor
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Publication number: 20140193924Abstract: Probes for monitoring electrostatic phenomena in challenging environments, such as fluidized bed reactors. These probes include a coated or uncoated static probe for measuring electric field and or particle charge state, an oscillatory electric field probe for measuring electric field, a chopped electric field probe for measuring electric field, and a radio-frequency antenna probe for detecting electrostatic discharges.Type: ApplicationFiled: December 27, 2013Publication date: July 10, 2014Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: William Anthony Lamberti, Joseph Andres Moebus, Harry William Deckman, Charles R. Buhler, Judson S. Clements
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Patent number: 8753894Abstract: An integrated microelectronic sensor is provided in a disposable flow membrane sensing device. The integrated sensors detect electromagnetic effect labels in flow detection zones above the sensor in the membrane. The labels are small particles that give off a detectable electromagnetic signal. They are commonly used for isolating and quantifying biochemical targets of interest. The sensors are fabricated using planar integrated circuit technologies. Sensors can detect labels of several types including magnetic, electric, and photonic. These types all have in common the fact that the sensor detects the label at a distance. Magnetoresistive sensors for detecting magnetic labels, and photodiodes for detecting photonic labels are described. A system for using the sensors is described. There are disposable cartridges with a backing that supports the sensors and membrane is described. The integrated sensor in the cartridge is designed to be discarded after use. Also, label excitation sources are provided.Type: GrantFiled: February 1, 2008Date of Patent: June 17, 2014Assignee: Diagnostic Biosensors, LLCInventor: Mark Christopher Tondra
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Patent number: 8734723Abstract: A gas sensor cell using a liquid crystal composite material is provided. The gas sensor cell has recovery capability and can be reused. Upon gas adsorption, the liquid crystal composite material has visually detectable color changes and changes in electrical properties to facilitate the measurement of gas concentration from low to high.Type: GrantFiled: August 30, 2013Date of Patent: May 27, 2014Assignee: Industrial Technology Research InstituteInventors: Chin-Kai Chang, Hui-Lung Kuo
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Patent number: 8703501Abstract: The present invention provides a method for directed assembly of a conducting polymer. A method of the invention comprises providing a template such as an insulated template and electrophorectically assembling a conducting polymer thereon. Preferably, the template comprises a patterned electrode on which the conducting polymer is assembled. Moreover, the invention provides a method for transferring an assembled conducting polymer. For example, a method of the invention comprises providing a substrate such as a polymeric substrate and contacting a surface thereof with an assembled conducting polymer. The assembled conducting polymer can be disposed on a patterned electrode of a template, hi one embodiment, a method comprises removing the substrate. By removing the substrate, the assembled conducting polymer is transferred from the patterned electrode of the template to the substrate. The invention also provides a device with a template or substrate comprising an assembled conducting polymer.Type: GrantFiled: June 7, 2006Date of Patent: April 22, 2014Assignee: Northeastern UniversityInventors: Joey L. Mead, Carol M. F. Barry, Ahmed Busnaina, Ming Wei, Zhenghong Tao
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Patent number: 8703500Abstract: A chemical sensor can include a nanofiber mass of p-type nanofibers having a HOMO level greater than ?5.0 eV. Additionally, the chemical sensor can include oxygen in contact with the p-type nanofibers. Further, the chemical sensor can include a pair of electrodes in electrical contact across the nanofiber mass, where the p-type nanofibers conduct an electric current that decreases upon contact with an amine compound.Type: GrantFiled: March 23, 2011Date of Patent: April 22, 2014Assignee: University of Utah Research FoundationInventors: Ling Zang, Yanke Che
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Patent number: 8691152Abstract: A method of measuring an analyte in a biological fluid comprises applying an excitation signal having a DC component and an AC component. The AC and DC responses are measured; a corrected DC response is determined using the AC response; and a concentration of the analyte is determined based upon the corrected DC response. Other methods and devices are disclosed.Type: GrantFiled: February 2, 2012Date of Patent: April 8, 2014Assignees: Roche Operations Ltd., Roche Diagnostics Operations, Inc.Inventors: David W. Burke, Lance S. Kuhn, Terry A. Beaty, Vladimir Svetnik
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Patent number: 8673649Abstract: A wireless chemical sensor includes an electrical conductor and a material separated therefrom by an electric insulator. The electrical conductor is an unconnected open-circuit shaped for storage of an electric field and a magnetic field. In the presence of a time-varying magnetic field, the first electrical conductor resonates to generate harmonic electric and magnetic field responses. The material is positioned at a location lying within at least one of the electric and magnetic field responses so-generated. The material changes in electrical conductivity in the presence of a chemical-of-interest.Type: GrantFiled: May 11, 2009Date of Patent: March 18, 2014Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Stanley E. Woodard, Donald M. Oglesby, Bryant Douglas Taylor
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Patent number: 8647490Abstract: The present invention relates to a method for manufacturing a micro wire, a sensor including the micro wire, and a method for manufacturing the sensor, having improved production efficiency. According to an embodiment of the present invention, a method for manufacturing a micro wire includes applying a three-dimensional electric field to a solution for forming a micro wire. The method for manufacturing the micro wire may further include providing an electrode assembly comprising a substrate, a first electrode and a second electrode formed on the substrate, and providing the solution to a space. The first electrode and the second electrode may form the space therebetween, and the space may have a first width and a second width that is smaller than the first width. The three-dimensional electric field is applied to the solution by applying a voltage to the first electrode and the second electrode.Type: GrantFiled: October 15, 2008Date of Patent: February 11, 2014Assignee: Postech Academy-Industry FoundationInventors: WooSeok Choi, Guenbae Lim, Tae-Chang An
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Publication number: 20140004618Abstract: A method and system for detecting the presence of chemical and/or biological agents are disclosed. An additive, which may comprise a reactant and/or a catalyst selected for its capacity to react with, or to force a reaction involving a target chemical and/or biological agent, may be introduced into a sample of an ambient environment to be monitored. The additive may then react with the target agent, or, as a catalyst, may drive a reaction with the target agent, resulting in a reaction product that may be detected by one or more sensors or sensor arrays. The method and system may incorporate a plurality of sensor types in order to enhance the specificity of the method and system.Type: ApplicationFiled: May 10, 2012Publication date: January 2, 2014Inventors: Poliang Chien, Dheeraj Jain, Kelley Lowery, Ryan Hur
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Patent number: 8617468Abstract: An assembly for testing platelet aggregation including an electrode subassembly that is mounted in a cuvette subassembly for use with relatively small samples containing platelets.Type: GrantFiled: October 18, 2011Date of Patent: December 31, 2013Assignee: Chrono-Log CorporationInventors: Andrew Roth, Nicholas J. Veriabo
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Patent number: 8591816Abstract: A cartridge device having a receiving portion for receiving a blood sample and a jack portion for receiving a plug; a stirring device for circulating the blood sample within the receiving portion; and an electrode holder having at least one incorporated electrode wire pair; wherein the electrode holder is attachable to the cell such that one end of the at least one electrode wire pair forms a sensor unit for measuring the electrical impedance between the two electrode wires of the at least one electrode wire pair within the blood sample and that the opposite end of the at least one electrode wire pair forms a plug portion being connectable directly to the plug for an electrical connection of the sensor unit to an analyzer.Type: GrantFiled: February 17, 2011Date of Patent: November 26, 2013Assignee: F. Hoffmann-La Roche AGInventors: Andreas Calatzis, Ben Krüger, Marc Wittwer
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Patent number: 8586373Abstract: The present disclosure relates to various methods for measuring the amount of an analyte present in a biological fluid using an electrochemical testing process. Various embodiments are disclosed, including the use of AC test signals and the performance of tests having a Total Test Time within about 3.0 seconds or less, and/or having a clinically low Total System Error.Type: GrantFiled: October 24, 2012Date of Patent: November 19, 2013Assignee: Roche Diagnostics Operations, Inc.Inventors: Eric R. Diebold, Terry A. Beaty, Harvey B. Buck, Jr.
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Patent number: 8529799Abstract: Provided is a manufacturing method of a metal oxide semiconductor material for gas sensors by which an oxide precursor and noble metal colloid particles will not readily cohere in the manufacturing process. The manufacturing process implements a precursor solution synthesis step 1 of synthesizing an oxide precursor solution in which an oxide precursor is dispersed, a pH adjustment step 3 of adjusting the pH of the oxide precursor solution, a precursor-colloid dispersion preparation step 5 of preparing an oxide precursor-noble metal colloid dispersion in which the oxide precursor and the noble metal colloid are dispersed substantially uniformly, a purifying step 7 of purifying the oxide precursor-noble metal colloid dispersion to obtain a purified oxide precursor noble metal colloid dispersion, and a freeze-drying step 11 of freeze-drying an precipitate of the purified oxide precursor-noble metal colloid dispersion.Type: GrantFiled: August 28, 2009Date of Patent: September 10, 2013Assignee: Hokuriku Electric Industry Co., Ltd.Inventors: Tetsuji Imamura, Daisuke Kuwahara, Takayuki Nakano, Takahiro Ishibashi
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Patent number: 8518708Abstract: A leak detection system for a flowing electrolyte battery comprising a containment member associated with at least one of a stack of a flowing electrolyte battery and an electrolyte reservoir of a flowing electrolyte battery and a sensing member for sensing a fluid leak within the containment member.Type: GrantFiled: July 16, 2012Date of Patent: August 27, 2013Assignee: Premium Power CorporationInventor: Rick Winter
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Patent number: 8521445Abstract: Methods and apparatus relate to measuring corrosion rate. Flowing corrosive fluid contacts a metal coupon or object and results in an effluent stream. The effluent stream contains metal from the object due to reaction of constituents in the fluid with the metal. Analysis of the effluent stream measures concentration of the metal therein. Since the concentration of the metal in the effluent stream is indicative of mass loss from the object, calculations provide the corrosion rate utilizing weight of the metal that is eluted, surface area of the object and exposure time of the object with the corrosive fluid.Type: GrantFiled: September 1, 2010Date of Patent: August 27, 2013Assignee: ConocoPhillips CompanyInventors: Ricky Eugene Snelling, Donald Ray Engelbert, Omar Jesus Yepez