Including Gas Absorption In Liquid Or Solid Patents (Class 436/167)
  • Patent number: 9063385
    Abstract: A display panel is provided. The display panel includes a first substrate and a second substrate. The second substrate comprises a center region, a first border region and a second border region. The center region has a first center region edge and a second center region edge. The center region corresponds to an active area for displaying an image of the display panel. The first border region, adjacent to the center region and located outside the first center region edge, has a first border region edge. The second border region, adjacent to the center region and located outside the second center region edge, has a second border region edge. The distance between the first center region edge and the first border region edge is larger than the distance between the second center region edge and the second border region edge.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: June 23, 2015
    Assignee: INNOLUX CORPORATION
    Inventors: Fu-Yuan Hsueh, Tzu-Yu Cheng
  • Patent number: 9023660
    Abstract: Methods are disclosed for producing a bioweapon-sensitive fibrous-network product, wherein the subject products exhibit a color change in response to exposure to a biological agent (or portion thereof) as used in a biological weapon. Also disclosed are fibrous-network products that contain units of biopolymeric material that impart a color change to the products in response to exposure to a biological agent (or portion thereof) as used in a biological weapon.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: May 5, 2015
    Inventors: Dennis Farwell, Keith Baumann
  • Patent number: 8999723
    Abstract: A reliable, low cost device for determining when dangerous levels of hydrogen gas have been generated in a transformer is disclosed. The hydrogen indicator is defined by a module assembly that threads into either the headspace or into the oil-filled body of a transformer. The module has an open interior that contains a film that incorporates a hydrogen-sensitive chemochromic indicator. The indicator film is visible through a lens. When the film has been exposed to hydrogen, chemical changes in the chemochromic indicator cause the film to change color—the color change is immediately visible through the lens.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: April 7, 2015
    Assignee: Serveron Corporation
    Inventor: Steven Mahoney
  • Patent number: 8935007
    Abstract: An analyte testing device is provided for use with a mobile processing device having a camera with a lens, a processor for processing an image captured by the lens. The analyte testing device comprises a casing and a test strip positioner. The test strip positioner positions an analyte containing test strip adjacent to the camera lens to permit the camera to capture an image of the analyte containing test strip. A light source is disposed within the casing. The light source is positioned within the casing to illuminate the analyte containing test strip to facilitate the capture of the image of the test strip. Software is contained within the mobile processing device for performing a quantitative analysis of at least one analyte from the captured image, and providing an output of the results of the quantitative analysis.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: January 13, 2015
    Assignee: 4a medicom GmbH
    Inventors: Hans G. Kloepfer, Thomas Kloepfer, Jason Heim, Reinhard Hafellner
  • Publication number: 20140287514
    Abstract: The present invention includes a sensing device and method detecting the presence of a chemical analyte, comprising: a surface; a continuous or discontinuous terbium(III)-triphenylphosphine oxide coordination polymer layer deposited on the surface, wherein the polymer layer is porous; and a luminescence detector, wherein one or more analytes that interact with the polymer layer luminesce at distinct wavelengths unique to each analyte.
    Type: Application
    Filed: March 17, 2014
    Publication date: September 25, 2014
    Inventors: Simon M. Humphrey, Bradley J. Holliday
  • Patent number: 8828734
    Abstract: Provided are a nitric oxide detection element capable of detecting NO gas contained in a mixed gas at a high speed even when the amount thereof is a super trace amount of ten and several parts per billion; and a process for producing the element. In a nitric oxide detection element having a substrate 12 and a sensing film 11 formed on a surface of the substrate, the sensing film is composed of nitric oxide sensing particles and a polymer adhesive. The nitric oxide sensing particles are produced by adsorbing a dye having a porphyrin skeleton and having, as a central metal, divalent cobalt onto surfaces of inorganic particles.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: September 9, 2014
    Assignees: Panasonic Healthcare Co., Ltd., National University Corporation Ehime University
    Inventors: Kouichi Hiranaka, Toyofumi Nagamatsu, Yoshihiko Sadaoka, Yoshiteru Itagaki
  • Patent number: 8809063
    Abstract: A fluorescence based sensor (10) is disclosed and described. The sensor (10) can include nanofibril materials (12) fabricated from a linear carbazole oligomer and a fluorescence detector (14). The linear carbazole oligomer can have the formula (I) wherein n is 3 to 9, R are independently selected amine sidegroups, and at least one, but not all, R is a C1 to C14 alkyl. The carbazole-based fluorescence based sensors (10) can be particularly suitable for detection of explosives and volatile nitro compounds.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: August 19, 2014
    Assignee: University of Utah Research Foundation
    Inventors: Ling Zang, Yanke Che
  • Patent number: 8790930
    Abstract: A chemical indicator having a particulate inorganic substrate, and at least one reactive dye or ink coated on and/or impregnated within the particulate inorganic substrate. Coating and/or impregnating at least one reactive dye or ink on or within a particulate inorganic substrate improves the storage stability and/or thermal stability of the at least one reactive dye or ink, which typically includes relatively unstable compounds. This allows the present indicators to be incorporated into thermoplastic polymer materials and processed conventionally while maintaining the efficacy and stability of the new indicators. The indicators provide simple, reliable, and cost effective detection means for detecting analytes such as ammonia, carbon dioxide, and oxygen, and may find use in applications such as food packaging and medical applications.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: July 29, 2014
    Assignee: University of Strathclyde
    Inventors: Andrew Mills, Pauline Grosshans, Graham Skinner
  • Patent number: 8765483
    Abstract: Provided herein are explosives detection substrates which include an electrospun (electro)sprayed and/or dry spun aromatic polymer, such as polystyrene, and a small molecule fluorophore. Methods for detecting an explosive material using such substrates are also provided.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: July 1, 2014
    Assignee: University of Connecticut
    Inventors: Yu Lei, Ying Wang
  • Patent number: 8759111
    Abstract: Porous sol-gel material essentially consisting of units of one or more first polyalkoxysilanes chosen from the following compounds: (chloromethyl)triethoxysilane; 1,3-dimethyltetramethoxydisiloxane; ethyl trimethoxysilane; triethoxy(ethyl)silane; triethoxymethylsilane; triethoxy(vinyl)silane; trimethoxymethylsilane; trimethoxy(vinyl)silane; tetraethoxysilane or tetramethoxysilane (TMOS) and of units of one or more second polyalkoxysilanes chosen from the following compounds: (N-(3-(trimethoxysilyl)propyl)ethylenediamine; 3-aminopropyltriethoxysilane (APTES) and 3-aminopropyltrimethoxysilane, in a first polyalkoxysilane/second polyalkoxysilane molar ratio of 1/0.01 to 1/1, optionally comprising a probe molecule, method of preparation and applications in the trapping of monocyclic aromatic hydrocarbons and other pollutants or in their detection.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: June 24, 2014
    Assignees: CEA—Commisariat a l'Energie Atomique et aux Energies Alternatives, CNRS—Centre National de la Recherche Scientifique
    Inventors: Sabine Crunaire, Thu-Hoa Tran-Thi
  • Patent number: 8735165
    Abstract: A sensor, a method for its fabrication, and a method for its use to detect contaminants, for example, ammonia, in stagnant and dynamic fluid media, especially liquid media. The sensor is an opto-chemical sensor that includes a polymer optical fiber, a sensing layer comprising oxazine 170 perchlorate on the polymer optical fiber, and a membrane layer on the sensing layer. The membrane layer is gas permeable and not permeable to the fluid in the fluid system, and moisture is entrapped by and between the sensing and membrane layers.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: May 27, 2014
    Assignee: Purdue Research Foundation
    Inventors: Agbai Agwu Nnanna, Ahmed Hasnain Jalal
  • Patent number: 8722417
    Abstract: An apparatus is provided for sensing an analyte in a fluid.
    Type: Grant
    Filed: January 20, 2007
    Date of Patent: May 13, 2014
    Assignee: Invoy Technologies, L.L.C.
    Inventor: Lubna Ahmad
  • Patent number: 8658429
    Abstract: A photoluminescent oxygen probe including a tack with a layer of a pressure-sensitive adhesive and an oxygen-sensitive photoluminescent element on the underside of the head. The probe is effective for sensing oxygen concentration within an enclosed space by puncturing the container defining the enclosed space the with the probe's shank and adhering the underside of the probe's head to the container so as to sealingly surround the puncture, thereby placing the oxygen-sensitive photoluminescent dye on the underside of the probe's head into sensible communication with the enclosed space through the puncture hole.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: February 25, 2014
    Assignee: Mocon, Inc.
    Inventors: Daniel W. Mayer, John Eastman
  • Patent number: 8647883
    Abstract: A method of quantitatively measuring the concentration of a chemical species in a sample solution with a sensor film. A hydrogel sensor film is prepared having a chemical composition comprising an indicator that changes its optical property in the ultra-violet, visible or near-infrared spectral range upon being exposed to the chemical species in the sample solution. The film is exposed to a fixed amount of the sample solution. The concentration of the chemical species in the sample solution is quantified using the average absorbance measured from the sensor film.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: February 11, 2014
    Assignee: General Electric Company
    Inventors: Radislav A. Potyrailo, Timothy M. Sivavec, Caibin Xiao, Theodore J. Cecconie, Lamyaa Hassib, Andrew M. Leach, David B. Engel
  • Patent number: 8574920
    Abstract: An optical fiber polarimetric chemical sensor for capillary gas chromatography in which a sample fluid is injected into a capillary in the form of a periodic pulse train. Each individual pulse defines a moving polarization coupling zone that affects the polarization state of the light propagating in a birefringent optical waveguide that includes the capillary. The spacing between consecutive coupling zones can be made equal to the polarization beat length of the waveguide when the injection frequency of the pulses is properly selected, thus defining a resonance condition for a given analyte. The contributions of the successive coupling zones present along the length of the capillary then add up in phase, thus resulting in a detected optical signal having an enhanced amplitude peak at the injection frequency. In this manner, the sensitivity can be enhanced.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: November 5, 2013
    Assignee: Institut National d'Optique
    Inventors: Serge Caron, Claude Pare
  • Patent number: 8557596
    Abstract: The invention provides a sensor for detecting nitrogen containing high explosives. The sensor includes a substrate and a blue-photoluminescent metallofluorene copolymer to be carried on said substrate during testing for nitrogen containing high explosives. The copolymer is preferably a blue-photoluminescent metallofluorene copolymer, and preferably is a vinyl bridged silafluorene copolymer. A method for detecting nitrogen containing high explosives involves exposing a copolymer to an analyte, preferably by spraying the copolymer or otherwise coating the substrate after it has been exposed to analyte and then exciting the copolymer to luminesce. The copolymer is observed for fluorescence quenching, which can be through human or electronic observation. The invention also provides for synthesis of a vinyl bridged silafluorene polymer by providing diethynylmetallofluorene and dihydrosilafluorene as precursors and conducting catalytic hydrosilation of the precursors.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: October 15, 2013
    Assignee: The Regents of the University of California
    Inventors: William C. Trogler, Jason Sanchez
  • Patent number: 8557595
    Abstract: The invention provides a sensor for detecting nitrogen containing high explosives. The sensor includes a substrate and a blue-photoluminescent metallofluorene copolymer to be carried on said substrate during testing for nitrogen containing high explosives. The copolymer is preferably a blue-photoluminescent metallofluorene copolymer, and preferably is a vinyl bridged silafluorene copolymer. A method for detecting nitrogen containing high explosives involves exposing a copolymer to an analyte, preferably by spraying the copolymer or otherwise coating the substrate after it has been exposed to analyte and then exciting the copolymer to luminesce. The copolymer is observed for fluorescence quenching, which can be through human or electronic observation. The invention also provides for synthesis of a vinyl bridged silafluorene polymer by providing diethynylmetallofluorene and dihydrosilafluorene as precursors and conducting catalytic hydrosilation of the precursors.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: October 15, 2013
    Assignee: The Regents of the University of California
    Inventors: William C. Trogler, Jason Sanchez
  • Patent number: 8518706
    Abstract: The invention relates to a method for sampling a sulphur-containing solid product including supplying a gas flow comprising hydrogen sulphide, bringing the gas flow into contact with a solid reagent and reacting the solid reagent with the hydrogen sulphide contained in the gas flow, the reaction fixing the sulphur of the hydrogen sulphide by forming a sulphur-containing solid product which is different in color from the solid reagent, and recovering the sulphur-containing solid product. The invention also relates to a device suitable for the implementation of this method.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: August 27, 2013
    Assignee: Total S.A.
    Inventors: Daniel Dessort, Robert Le Van Loï, Nadine Loubere
  • Patent number: 8513022
    Abstract: A method for determining the amount of a chemical species in a sample, in particular the amount of weak acid dissociable cyanide or total cyanide in a sample, and an apparatus for performing said method. The method comprises the steps of: i) treating the sample to liberate the chemical species into a gaseous stream; ii) directing the gaseous stream to a scrubber; iii) absorbing the chemical species into a scrubber solution; and iv) determining the amount of chemical species absorbed into the scrubber solution, wherein any remaining chemical species not absorbed into the scrubber solution is directed or recirculated to the scrubber in the gaseous stream and step iii) is repeated to increase absorption of the chemical species prior to performing step iv).
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: August 20, 2013
    Assignee: Cyantific Instruments Pty Ltd
    Inventor: Fraser John Ross
  • Patent number: 8487790
    Abstract: The described embodiments may provide a chemical detection circuit. The chemical detection circuit may comprise a pixel array, a pair of analog-to-digital converter (ADC) circuit blocks, a pair of input/output (I/O) circuit blocks coupled to the pair of ADC circuit blocks respectively, and a plurality of serial link terminals coupled to the pair of IO circuit blocks. The pixel array may comprise a plurality of chemically-sensitive pixels formed in columns and rows. Each chemically-sensitive pixel may comprise: a chemically-sensitive transistor, and a row selection device.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: July 16, 2013
    Assignee: Life Technologies Corporation
    Inventors: Keith Fife, Jungwook Yang
  • Patent number: 8470248
    Abstract: A detector detects the color of a medium after a gas to be identified and a reagent have chemically reacted with each other on the medium. A controller identifies color information, which is most similar to the color detected by the detector, from color information stored in a spectral database, and reads gas identifying information related to the identified color information, as gas identifying information representing the gas to be identified, from the spectral database.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: June 25, 2013
    Assignee: NEC Corporation
    Inventor: Naoki Oda
  • Patent number: 8431409
    Abstract: Provided are methods, devices and systems that utilize free-surface fluidics and SERS for analyte detection with high sensitivity and specificity. The molecules can be airborne agents, including but not limited to explosives, narcotics, hazardous chemicals, or other chemical species. The free-surface fluidic architecture is created using an open microchannel, and exhibits a large surface to volume ratio. The free-surface fluidic interface can filter interferent molecules, while concentrating airborne analyte molecules. The microchannel flow enables controlled aggregation of SERS-active probe particles in the flow, thereby enhancing the detector's sensitivity.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: April 30, 2013
    Assignees: The Regents of the University of California, The Board of Trustees of the Leland Stanford Junior University
    Inventors: Carl D. Meinhart, Brian Piorek, Seung Joon Lee, Martin Moskovits, Sanjoy Banerjee, Juan Santiago
  • Patent number: 8431415
    Abstract: The present invention provides a reagent for an immunoassay comprising insoluble carrier particles which can give the values to be determined with high accuracy and reliability, and can be stored for a long time; an immunoassay using the reagent; and a method for keeping the reagent stable.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: April 30, 2013
    Assignee: TFB, Inc.
    Inventor: Kayoko Shigenobu
  • Patent number: 8409864
    Abstract: An ammonia gas sensing device includes a housing defining a fluid flow path. The fluid flow path includes a fluid inlet, a fluid outlet, and an access port. A gas permeable/liquid impermeable membrane is mounted on and sealed against the housing at the access port such that the membrane is exposed to the fluid flow path but fluid is blocked from flowing outward of the access port around rather than through the membrane. An ammonia sensor is mounted on the housing at the access port in a position outward of the membrane. A system for using the ammonia sensing device includes the ammonia gas sensing device, a light source directed at the ammonia sensor, a photo detector to measure the light reflected off the ammonia sensor from the light source, and a controller for controlling the light source and optical sensor.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: April 2, 2013
    Assignee: Renal Solutions, Inc.
    Inventor: Stephen R. Ash
  • Patent number: 8377705
    Abstract: A breath analyzer system and method for determining an estimate of blood alcohol concentration of a person. A light source projects light into a sampling region where breath from the person is expected. A first light detector and a second light detector are configured to detect light intensity of light having certain wavelengths at a first time and a second time. Signals from the light detectors at the first time and the second time are used to determine an estimate of the blood alcohol concentration of the person by determining a ratio of a first light detector signal change to a second light detector signal change.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: February 19, 2013
    Assignee: Delphi Technologies, Inc.
    Inventors: David K. Lambert, Michel F. Sultan
  • Patent number: 8361810
    Abstract: Methods are disclosed for producing a bioweapon-sensitive fibrous-network product, wherein the subject products exhibit a color change in response to exposure to a biological agent (or portion thereof) as used in a biological weapon. Also disclosed are fibrous-network products that contain units of biopolymeric material that impart a color change to the products in response to exposure to a biological agent (or portion thereof) as used in a biological weapon.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: January 29, 2013
    Inventors: Dennis Farwell, Keith Baumann
  • Patent number: 8323978
    Abstract: A calibration device and method of using the device to calibrate an analytical instrument capable of reading a photoluminescent oxygen probe. The device includes at least (a) a first mass of an oxygen sensitive photoluminescent dye retained within a hermetically sealed space so as to isolate the dye from environmental oxygen, and in fluid communication with an activated metal-air battery whereby any oxygen permeating into the hermetically sealed space is quickly consumed by the battery, and (b) a second mass of an oxygen sensitive photoluminescent dye in fluid communication with an environmental concentration of oxygen.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: December 4, 2012
    Assignee: Mocon, Inc.
    Inventors: Timothy A. Ascheman, Daniel W. Mayer
  • Patent number: 8318498
    Abstract: The present invention relates to the use of cyclometalated iridium complexes for detecting poly(amino acids) including peptides, polypeptides, and proteins. Poly(amino acids) are detected in solution, in electrophorectic gels, and on solid supports, including blots. The method of the present invention is rapid, highly sensitive, and extremely facile.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: November 27, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventors: Kwok-Yin Wong, Dik-Lung Ma, Wing-Leung Wong, Wai-Hong Chung, Fung-Yi Chan
  • Patent number: 8268392
    Abstract: Methods, processes and compositions are provided for a visual or chemochromic hydrogen-detector with variable or tunable reversible color change. The working temperature range for the hydrogen detector is from minus 100° C. to plus 500° C. A hydrogen-sensitive pigment, including, but not limited to, oxides, hydroxides and polyoxo-compounds of tungsten, molybdenum, vanadium, chromium and combinations thereof, is combined with nano-sized metal activator particles and preferably, coated on a porous or woven substrate. In the presence of hydrogen, the composition rapidly changes its color from white or light-gray or light-tan to dark gray, navy-blue or black depending on the exposure time and hydrogen concentration in the medium. After hydrogen exposure ceases, the original color of the hydrogen-sensitive pigment is restored, and the visual hydrogen detector can be used repeatedly.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: September 18, 2012
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventor: Nazim Z. Muradov
  • Patent number: 8247238
    Abstract: Provided are methods, devices and systems that utilize free-surface fluidics and SERS for analyte detection with high sensitivity and specificity. The molecules can be airborne agents, including but not limited to explosives, narcotics, hazardous chemicals, or other chemical species. The free-surface fluidic architecture is created using an open microchannel, and exhibits a large surface to volume ratio. The free-surface fluidic interface can filter interferent molecules, while concentrating airborne analyte molecules. The microchannel flow enables controlled aggregation of SERS-active probe particles in the flow, thereby enhancing the detector's sensitivity.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: August 21, 2012
    Assignee: The Regents of the University of California
    Inventors: Carl D. Meinhart, Brian Piorek, Seung Joon Lee, Martin Moskovits, Sanjoy Banerjee, Juan Santiago
  • Patent number: 8241911
    Abstract: A calibration card and method of using the card to calibrate an analytical instrument capable of reading a photoluminescent oxygen probe. The card includes at least (a) a first mass of an oxygen sensitive photoluminescent dye retained within a hermetically sealed space so as to isolate the dye from environmental oxygen, and in fluid communication with an activated metal-air battery whereby any oxygen permeating into the hermetically sealed space is quickly consumed by the battery, and (b) a second mass of an oxygen sensitive photoluminescent dye in fluid communication with the environment whereby the second mass of photoluminescent dye is exposed to an environmental concentration of oxygen.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: August 14, 2012
    Assignee: Mocon, Inc.
    Inventors: Timothy A. Ascheman, Daniel W. Mayer, Stephen D. Tuomela
  • Patent number: 8178355
    Abstract: The present invention relates to the field of detection of components in gas phase, and in particular to detection of nitric oxide exhaled as a component of breath, using a liquid crystal assay format and a device utilizing liquid crystals as part of a reporting system.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: May 15, 2012
    Assignee: Platypus Technologies, LLC.
    Inventors: Bharat Acharya, Avijit Sen, Nicholas Abbott, Kurt Kupcho
  • Patent number: 8173440
    Abstract: The invention concerns a method for detecting and/or assaying and/or capturing at least one aldehyde, preferably formaldehyde, including a step of contacting a gas stream with a material comprising a nonporous metal oxide sol-gel matrix, said matrix containing at least one probe molecule bearing at least one reactive function capable of reacting with at least one aldehyde function. The invention also concerns the material for implementing said method, a method for preparing same, and sensors incorporating such materials.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: May 8, 2012
    Assignees: Commisariat a l'Energie Atomique, Centre National de la Recherche Scientifique-CNRS
    Inventors: Hélène Paolacci, Thu-Hoa Tran-Thi
  • Patent number: 8138482
    Abstract: A process for evaluating a cleaning solution is described. The process includes: (i) subjecting a solution, including a solute and a solvent, to sonic energy to create a sonicated solution; (ii) measuring UV absorption of the sonicated solution to produce a sample UV absorbance spectra; (iii) obtaining a reference solution, which includes a solute concentration that is similar to that of solute concentration in the sonicated solution; (iv) measuring UV absorption of the reference solution to produce a reference UV absorbance spectra; (v) scaling the reference UV absorbance spectra to the sample UV absorbance spectra at a lower range of the UV spectrum; (vi) subtracting from the reference UV absorbance spectra the sample UV absorbance spectra to produce a differential UV spectra; and (vii) evaluating at or near a peak of the sample UV absorbance spectra the differential UV absorbance spectra to determine whether the sonicated solution is activated.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: March 20, 2012
    Assignee: Nano Green Technology, Inc.
    Inventors: Ariel Flat, Suraj Puri
  • Patent number: 8093055
    Abstract: A calibration tool for use in combination with a photoluminescent oxygen-sensitive working probe and an analytical instrument capable of reading the working probe. The calibration tool is effective for achieving two-point calibration of the analytical instrument, and includes at least first and second solid state compositions having different sensitivities to oxygen. The first composition is an oxygen-sensitive photoluminescent dye that is the same as that in the working probe, embedded within an oxygen-permeable carrier matrix that is the same as that in the working probe. The second composition is an oxygen-sensitive photoluminescent dye that is the same as that in the first composition, embedded within a carrier matrix that is different from that in the first composition. The oxygen sensitivity of the second composition is less than the oxygen sensitivity of the first composition.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: January 10, 2012
    Assignees: Mocon, Inc., Luxcel Biosciences, Ltd.
    Inventors: Daniel W. Mayer, Dmitri Boris Papkovsky
  • Patent number: 8066944
    Abstract: This invention relates to a chemical sensing device for detecting an analyte. The device comprises a light source; at least one luminescent reagent which is capable of luminescing when irradiated by the light source wherein the luminescence of the luminescent reagent is modifiable by the analyte thereby changing the generation of heat, which change in heat generation is proportional to the concentration of the analyte, a transducer having a pyroelectric or piezoelectric element and electrodes which is capable of transducing the change in heat to an electrical signal, and a detector which is capable of converting the electrical signal into an indication of the concentration of the analyte. The invention also relates to a method for detecting an analyte.
    Type: Grant
    Filed: January 24, 2006
    Date of Patent: November 29, 2011
    Assignee: Vivacta Limited
    Inventors: Timothy Joseph Nicholas Carter, Florence Colin, Steven Andrew Ross, John Dalton Wright
  • Patent number: 8067244
    Abstract: A method and device for investigation of a surface layer of a material. The material without surface layer is exposed for a gas and the penetration of the gas into the material is measured. Then the surface layer is applied to the material. Finally, the material including the surface layer is exposed for the gas and the penetration of the gas into the material through the surface layer is measured. The measurement of the passage of the gas into the material is performed by a method comprising measurement of light absorption by the gas by absorption spectroscopy.
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: November 29, 2011
    Assignee: GasPorOx AB
    Inventors: Sune Svanberg, Mikael Sjoholm, Gabriel Somes-Falean
  • Patent number: 8043860
    Abstract: This application relates to vaprochromic coordination polymers useful for analyte detection. The vapochromism may be observed by visible color changes, changes in luminescence, and/or spectroscopic changes in the infrared (IR) signature. One or more of the above chromatic changes may be relied upon to identify a specific analyte, such as a volatile organic compound or a gas. The chromatic changes may be reversible to allow for successive analysis of different analytes using the same polymer. The polymer has the general formula MW[M?X(Z)Y]N wherein M and M? are the same or different metals capable of forming a coordinate complex with the Z moiety; Z is selected from the group consisting of halides, pseudohalides, thiolates, alkoxides and amides; W is between 1-6; X and Y are between 1-9; and N is between 1-5. Optionally, an organic ligand may be bound to M. In alternative embodiments of the invention M may be a transition metal, such as Cu and Zn.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: October 25, 2011
    Assignee: Simon Fraser University
    Inventors: Julie Lefebvre, Michael Iacov Katz, Daniel B. Leznoff
  • Patent number: 8043861
    Abstract: An apparatus for detecting exposure to at least one hazardous substance is provided. The apparatus includes a body having a plurality of openings, and an attachment mechanism coupled to the body. Each opening is sized to receive a cassette for detecting the presence or absence of at least one hazardous substance. The cassette can include a colorimetric sensor having a base layer fabricated from a hydrophobic film, a colorimetric coating for covering the hydrophobic film, and at least one hydrophobic membrane for controlling the exposure of the specific substance to the colorimetric coating.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: October 25, 2011
    Assignee: K & M Environmental, Inc.
    Inventor: Edward P. Locke
  • Patent number: 8017408
    Abstract: Provided are methods, devices and systems that utilize free-surface fluidics and SERS for analyte detection with high sensitivity and specificity. The molecules can be airborne agents, including but not limited to explosives, narcotics, hazardous chemicals, or other chemical species. The free-surface fluidic architecture is created using an open microchannel, and exhibits a large surface to volume ratio. The free-surface fluidic interface can filter interferent molecules, while concentrating airborne analyte molecules. The microchannel flow enables controlled aggregation of SERS-active probe particles in the flow, thereby enhancing the detector's sensitivity.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: September 13, 2011
    Assignee: The Regents of the University of California
    Inventors: Carl D. Meinhart, Brian Piorek, Seung Joon Lee, Martin Moskovits, Sanjoy Banerjee, Juan G. Santiago
  • Patent number: 8008090
    Abstract: This application relates to vaprochromic coordination polymers useful for analyte detection. The vapochromism may be observed by visible color changes, changes in luminescence, and/or spectroscopic changes in the infrared (IR) signature. One or more of the above chromatic changes may be relied upon to identify a specific analyte, such as a volatile organic compound or a gas. The chromatic changes may be reversible to allow for successive analysis of different analytes using the same polymer. The polymer has the general formula MW[M?X(Z)Y]N wherein M and M? are the same or different metals capable of forming a coordinate complex with the Z moiety; Z is selected from the group consisting of halides, pseudohalides, thiolates, alkoxides and amides; W is between 1-6; X and Y are between 1-9; and N is between 1-5. Optionally, an organic ligand may be bound to M.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: August 30, 2011
    Assignee: Simon Fraser University
    Inventors: Julie Lefebvre, Michael Iacov Katz, Daniel B. Leznoff
  • Patent number: 8003055
    Abstract: Methods, processes and compositions are provided for a visual or chemochromic hydrogen-detector with variable or tunable reversible color change. The working temperature range for the hydrogen detector is from minus 100° C. to plus 500° C. A hydrogen-sensitive pigment, including, but not limited to, oxides, hydroxides and polyoxo-compounds of tungsten, molybdenum, vanadium, chromium and combinations thereof, is combined with nano-sized metal activator particles and preferably, coated on a porous or woven substrate. In the presence of hydrogen, the composition rapidly changes its color from white or light-gray or light-tan to dark gray, navy-blue or black depending on the exposure time and hydrogen concentration in the medium. After hydrogen exposure ceases, the original color of the hydrogen-sensitive pigment is restored, and the visual hydrogen detector can be used repeatedly.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: August 23, 2011
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventor: Nazim Muradov
  • Patent number: 8003056
    Abstract: A gas analyzer apparatus includes a device or platform for supporting a predetermined quantity of a reagent capable of reacting with a predetermined gas to cause a detectable change in a characteristic of the reagent, a reservoir adapted to retain the reagent, a dispenser for dispensing a controlled quantity of the reagent from the reservoir to a predetermined position on the device for supporting the predetermined quantity of the reagent, and a detector that detects the presence of the predetermined gas upon the predetermined gas and the controlled quantity of reagent reacting to cause a detectable change in a characteristic of the reagent detectable by the detector, the detector adapted to detect a change in the controlled quantity of the reagent by detecting the change in the characteristic through the predetermined quantity of the reagent.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: August 23, 2011
    Assignee: Honeywell International Inc.
    Inventors: Ulrich Bonne, Patrick G. Hogan, Richard A. Gorny, Leslie T. Ivie
  • Patent number: 7977103
    Abstract: A method for detecting the onset of ovulation in a female mammal is provided. The method includes contacting mouth air of the female mammal with an arylmethane test chromogen in an amount effective to undergo a rapid and detectable color change in the presence of one or more volatile sulfur compounds. The color of the test chromogen is compared to a control color that corresponds to a pre-ovulatory sulfur content. The difference in color between the test chromogen and the control color is correlated to the onset of ovulation.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: July 12, 2011
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Stephanie Michelle Martin, RameshBabu Boga, John Gavin MacDonald
  • Patent number: 7850918
    Abstract: Embodiments of the invention contemplate an apparatus that determines gas sorption properties of a large number of material samples simultaneously, by sequentially measuring the pressure in a plurality of sample chambers until all chambers have reached equilibrium pressure. In most applications, it is most useful to quantify the sorption capacity of a material under specific conditions, i.e., at a certain temperature and pressure. Because sorption capacity is determined by bringing a material sample to an equilibrium state with a dosing gas, detailed kinetic data related to the sorption properties of a material are not absolutely necessary. Therefore, complete pressure-time curves are not typically necessary, and only the equilibrium pressure of a material sample for a given quantity of dosing gas is required.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: December 14, 2010
    Assignee: Hy-Energy, LLC
    Inventor: Karl J. Gross
  • Publication number: 20100279427
    Abstract: Devices and methods for measuring the acidity of airborne matter are provided. A filter can be impregnated with an indicator dye which changes color in response to changes in acidity. After the sample passes through the filter, the filter can be analyzed using UV-visible spectrometry.
    Type: Application
    Filed: December 23, 2008
    Publication date: November 4, 2010
    Inventor: Myoseon Jang
  • Patent number: 7807473
    Abstract: A method of quantitatively measuring the concentration of a chemical species in a sample solution with a sensor film. A hydrogel sensor film is prepared having a chemical composition comprising an indicator that changes its optical property in the ultra-violet, visible or near-infrared spectral range upon being exposed to the chemical species in the sample solution. The film is exposed to a fixed amount of the sample solution. The concentration of the chemical species in the sample solution is quantified using the average absorbance measured from the sensor film.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: October 5, 2010
    Assignee: General Electric Company
    Inventors: Radislav A. Potyrailo, Timothy M. Sivavec, Caibin Xiao, Theodore J. Cecconie, Lamyaa Hassib, Andrew M. Leach, David B. Engel
  • Publication number: 20100240143
    Abstract: A fully integrated portable screening system includes a main housing and a contact pad. The contact pad is removably positioned in the main housing and covered by at least one sample sheet. The contact pad is preferably constituted by a cylindrical baton which carries a roll of sample collection sheets. A test subject interacts with the contact pad, leaving a trace sample on the sample collection sheet. The contact pad is then placed within the main housing and the trace sample is exposed to a test medium designed to interact with a specific analyte of interest potentially present in the trace sample. After exposure to the test medium, the sample sheet is subjected to a testing mechanism which exposes any interaction between the test medium and the analyte of interest to produce a test result.
    Type: Application
    Filed: September 22, 2006
    Publication date: September 23, 2010
    Inventors: Khaled F. Eltomi, Jack Kotowicz, Pratheev Sabaratnam Sreetharan, Regina Elvira Dugan
  • Patent number: 7736903
    Abstract: A chemical vapor sensor is provided that passively measures a suspect chemical species of interest with high sensitivity and chemical specificity, for use with safety systems. A vapor concentrator amplifies a suspect chemical vapor concentration to a detectible level, for use with an infrared detector. Compensation is provided for environmental variations that may influence the passive measurement of the chemical vapor sensor. Environmental variations may include extrinsic vapors in the surrounding air, or air currents that divert the sample vapor as it drifts from the suspect vapor source to a sampling intake. In an example, ethanol vapor is measured and carbon dioxide tracer measurements are used to calculate an ethanol vapor measurement that is adjusted for environmental variations. In an aspect, a time artifact filter sets the output of the carbon dioxide sensor to match the time dependence of the ethanol sensor, to calculate blood alcohol concentration.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: June 15, 2010
    Assignee: Delphi Technologies, Inc.
    Inventors: David K Lambert, Dale L. Partin, Michel F. Sultan
  • Patent number: 7704751
    Abstract: A method of detecting organic vapors is described. More particularly, the method involves the use of an analyte sensor that contains a polymeric material having a relatively large intrinsic porosity and that is capable of fluorescence in the visible region of the electromagnetic spectrum. The method further includes exposing the analyte sensor to an environment that may contain an organic vapor and monitoring the analyte sensor for a change in a fluorescence signal. Although the organic vapor itself typically does not fluoresce in the visible wavelength range, presence of an organic vapor can alter the fluorescence signal of the analyte sensor.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: April 27, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Michael C. Palazzotto, Neal A. Rakow, Michael S. Wendland