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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7592184 | Ammonia detection and measurement device There is disclosed an apparatus and method for detecting and measuring volatile acidic or basic components including ammonia, ammonium, or volatile amines (compound) in a gas or liquid state fluid. Specifically, the present invention provides a PTFE-carrier solid ph... | 09/22/2009 |
| 7582485 | Method and device for detecting ammonia odors and helicobacter pylori urease infection The invention provides a breath testing device which visually indicates the presence of ammonia in a patient's breath, in particular ammonia from helicobacter pylori urease infection. The breath testing device comprises a visual indicating agent which changes... | 09/01/2009 |
| 7442555 | Ammonia gas sensor method and device A mixed potential sensor device and methods for measuring total ammonia (NH3) concentration in a gas is provided. The gas is first partitioned into two streams directed into two sensing chambers. Each gas stream is conditioned by a specific catalyst syste... | 10/28/2008 |
| 7425453 | Integrated circuit porphyrin-based optical Fabry-Perot chemical sensor A Fabry-Perot cavity has a pair of partially transmissive, partially reflective, surfaces. A first of the surfaces is flexibly suspended adjacent and parallel to a second of the surfaces. A gap exists between the surfaces. A variable electrostatic potential permits ... | 09/16/2008 |
| 7371457 | Nanoparticle comprising nanoshell of thickness less than the bulk electron mean free path of the shell material The present invention is for particulate compositions and methods for producing them that can absorb or scatter electromagnetic radiation. The particles are homogeneous in size and are comprised of a nonconducting inner layer that is surrounded by an electrically co... | 05/13/2008 |
| 7364912 | Controlling the flow of hydrogen and ammonia from a hydrogen generator during a breakthrough with hydrated copper (II) chloride trap Gas flow is controlled to a feed gas consuming device depending on whether a contaminant gas is present. In one embodiment, hydrogen gas flow from a hydrogen gas generator to a hydrogen consuming device, such as a fuel cell, gas chromatograph or a flame ionization d... | 04/29/2008 |
| 7341694 | Ammonia sensor In an ammonia sensor (1), lead portions (7) and (9) are provided on an insulating substrate (5); a pair of comb-shaped electrodes (11) and (13) are connected to the lead portions (7) and (9), respectively; a se... | 03/11/2008 |
| 7332076 | Water disinfection system using simultaneous multiple disinfectants A water disinfection system using simultaneous multiple disinfectants includes a completely stirred tank reactor (CSTR) and a contact basin or clearwell acting as a plug flow reactor (PFR). The CSTR receives ammoniated water and free chlorine, and generates multiple... | 02/19/2008 |
| 7320781 | Method for adjusting a reductant used in an internal combustion engine to reduce NOx A method for controlling reductant injection into an exhaust stream upstream of a catalyst coupled to an internal combustion engine is disclosed. In the method, an ammonia sensor located downstream of the exhaust catalyst is used to determine ammonia concentration i... | 01/22/2008 |
| 7301339 | Estimating the concentration of a substance in a sample using NMR A method for estimating a concentration of a substance in a test sample of formation fluid, comprising measuring an NMR parameter of a first sample of formation fluid to obtain a first measurement, adding a known quantity of the substance to the first sample to prod... | 11/27/2007 |
| 7294512 | Solution for calibrating a chemical analyzer for alcohol, carbonate and ammonia assays A multi-analyte calibration solution having known amounts of sodium carbonate, ammonium bicarbonate, and ethyl alcohol, with pH adjusted within a range between about 7.8 and 8.4. ... | 11/13/2007 |
| 7267989 | Method and device for measuring sulfur compound and/or ammonia based on a sensory unit coated with at least one novel peptide A peptide compound for measuring sulfur compound and ammonia and measurement method and device using the compound. The method comprises contacting an analyte with a sensory device coated with the peptide compound to produce a signal, processing the signal to produce... | 09/11/2007 |
| 7229835 | Amine detection method and materials A compound linked to a solid support (R) through a divalent linker moiety (X) and which is represented by the following formula: is disclosed. In particular, the 1-hydroxybenzotriazole-6-carboxylic acid is direct... | 06/12/2007 |
| 7224462 | Beam shifting surface plasmon resonance system and method The invention relates to a surface plasmon resonance system method. The system has at least one light source operable to generate a source beam, a prism having a rear surface at least partially coated with a metallic coating and optionally a dielectric layer. At lea... | 05/29/2007 |
| 7189574 | Measurement of nitrogen content in a gas mixture by transforming the nitrogen into a substance detectable with nondispersive infrared detection A method of determining the amount of nitrogen in a gas mixture. The constituent gases of the mixture are dissociated and transformed to create a substance that may measured using nondispersive infrared adsorption techniques. ... | 03/13/2007 |
| 7186799 | Peptide and amine examination method using the same A peptide for detecting amine, and a method and apparatus for detecting amines using the peptide. The method comprises the application of a sensor to examine a sample, wherein the sensor is coated with the peptide. The result collected from the sensor is compared wi... | 03/06/2007 |
| 7153693 | Method and apparatus for determining urea concentration A method for determining a urea concentration in an aqueous solution containing urea, includes: hydrolyzing the urea in the aqueous solution, measuring an electric conductivity χ of the aqueous solution, and determining the urea concentration in the aqueous solutio... | 12/26/2006 |
| 7148066 | Dye solutions for use in methods to detect the prior evaporation of anhydrous ammonia and the production of illict drugs Systems and methods providing for the introduction of a dye, particularly a xanthene dye, and more particularly a rhodamine dye, to liquid anhydrous ammonia to discourage theft of the anhydrous ammonia and provide for leak detection in storage vessels. The dye will ... | 12/12/2006 |
| 7144627 | Multi-layer nanoshells comprising a metallic or conducting shell Composite particles containing metallic shell layers are provided. The particles may include a coating layer, such as of a protective or electrically non-conducting material, over an outermost metallic shell layer. The particle preferably has a plasmon resonance ass... | 12/05/2006 |
| 7091043 | Method for measuring water concentration in ammonia Method and apparatus for measuring a water concentration in ammonia, comprising using ammonia having a water concentration of 10 ppm or less as a reference gas, introducing the ammonia at a constant flow rate into a multi-reflection long optical path gas cell, and m... | 08/15/2006 |
| 7067320 | Sensor for luminescense-optical determination of an analyte The invention relates to an optochemical sensor functioning in accordance with the FRET-principle and exhibiting an acceptor (chromophore or luminophore) responsive to an analyte contained in a sample medium as well as a donor (luminophore), characterized in that ac... | 06/27/2006 |
| 7067319 | System for diagnosing reagent solution quality and emissions catalyst degradation A system for determining a reagent solution quality indicator includes a reagent solution source for supplying the reagent solution to an emissions catalyst configured to receive a NOx-containing gas therethrough, means for determining a flow rate of NOx reduced fro... | 06/27/2006 |
| 7048517 | Pump as a pressure source for supercritical fluid chromatography The invention is a device and method in a high-pressure chromatography system, such as a supercritical fluid chromatography (SFC) system, that uses a pump as a pressure source for precision pumping of a compressible fluid. The preferred exemplary embodiment comprise... | 05/23/2006 |
| 7033839 | Quick acting toxic ammonia test for aqueous samples A method, test reagent and device usable as a test strip for detecting toxic ammonia levels in water samples such as aquarium water. The volume of the water to be tested contacted with a soda lime reagent to raise the pH to at least 10, and simultaneously contacted ... | 04/25/2006 |
| 7036105 | Integrated circuits with at least one layer that has more than one preferred interconnect direction, and method for manufacturing such IC's Some embodiments of the invention provide an integrated-circuit chip that has a design based on a wiring model that allows at least a particular wiring layer to have more than one preferred wiring directions. Other embodiments provide a method of manufacturing an in... | 04/25/2006 |
| 7029920 | Method and system for monitoring combustion source emissions A method and system for determining a concentration level of NOx in an exhaust stream from a combustion source. The method comprises capturing sample gas from the exhaust stream using a sampling device. NO2 in the sample gas is converted to NO ... | 04/18/2006 |
| 6993955 | Gas sensors Semiconductor gas sensors with improved selectivity to target gases are provided by having a semiconductor gas-sensing layer and a layer thereon of microporous ceramic oxide having catalytic activity. ... | 02/07/2006 |
| 6947138 | Optical sensor system and method for detection of hydrides and acid gases A gas sensor for detection of hydride and/or acid gas species, featuring a color changing material that changes color in exposure to hydride and/or acid gas species, component(s) for impinging radiation on the color changing material for reflection therefrom, and co... | 09/20/2005 |
| 6881583 | Water chloramination control system A water chloramination control system compares the concentration of aqueous higher chloramines to aqueous ammonia to optimize the ratio of added ammonia to chlorine. Aqueous ammonia concentration is measured by conversion to monochloramine which concentration is det... | 04/19/2005 |
| 6790264 | Control of ammonia emission from ammonia laden fly ash in concrete The present invention relates to a pozzolanic admixture containing ammonia-laden fly ash, method for making the pozzolanic admixture and method for controlling ammonia gas (NH3) emission from cementitious slurries using the pozzolanic admixture. The assoc... | 09/14/2004 |
| 6763585 | Method for producing micro bump A resist pattern in accordance with a predetermined pattern is formed on a substrate. Next, a bump resist mixed with a micro metallic powder is made thicker than the resist pattern and formed on the substrate formed with the resist pattern. Continuously, the bump re... | 07/20/2004 |
| 6720171 | Combinatorial preparation and testing of heterogeneous catalysts A process for preparing arrays of two or more heterogeneous catalysts, heterogeneous catalyst precursors, or combinations thereof in a body having preferably parallel through-channels. In this process, a solution, emulsion or dispersion of elements present in the ca... | 04/13/2004 |
| 6509194 | Method and apparatus for determining concentration of NH-containing species A method and apparatus for determining ammoniacal species concentration in a gas sample. In one embodiment, trace concentration of ammonia in an air sample is determined by monitoring emission intensity from an excited radical species (NH*), which is prod... | 01/21/2003 |
| 6406669 | Polyaniline-based optical ammonia detector Electronic absorption spectroscopy of a polyaniline film deposited on a polyethylene surface by chemical oxidation of aniline monomer at room temperature was used to quantitatively detect ammonia gas. The present optical ammonia gas detector was found to ... | 06/18/2002 |
| 6368870 | Controlled diffusion analysis A method is described for determining the presence of a volatile component in a test sample. The method involves use of two separate vessels, one of which is capable of being placed wholly within the other vessel. The test sample is placed in the larger v... | 04/09/2002 |
| 6337211 | System and a method for detecting antifreezing substances in a hermetic compressor The invention relates to a system and a method for detecting antifreezing substances in a hermetic compressor.... | 01/08/2002 |
| 6248595 | Method of measuring a nitrification rate for liquids The invention relates to apparatus and a method for measuring NOx in biochemical processes, and to apparatus and methods for real time measuring the nitrification and/or denitrification rate of a liquid with or without suspended solids.... | 06/19/2001 |
| 6207460 | Detection of base contaminants in gas samples A detection system for detecting contaminant gases includes a converter, a detector, a primary channel for delivering a target gas sample through the converter to the detector, and at least two scrubbing channels for delivering a reference gas sample thro... | 03/27/2001 |
| 6187596 | Airborne contaminant indicator An indicator system provides a visual indication of the cumulative level of an airborne contaminant. The indicator is a transparent sheath with support medium having an acidic surface and treated with a color pH indicator. As a basic contaminant is adsorb... | 02/13/2001 |
| 6143246 | Apparatus for measuring ammonia in biochemical processes The present invention relates to apparatus and a method for measuring ammonia in biochemical processes, and more particularly to apparatus for real time measuring the amount of ammonia in a liquid with or without suspended solids.... | 11/07/2000 |
