Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8142641 | Electrochemical sensor A electrochemical sensor comprising a mounting having screen printed array of electrodes located thereon, the array comprising a reference electrode, a counter electrode and a plurality of working electrodes, wherein the working electrodes are each overlaid with an ... | 03/27/2012 |
| 8142640 | Chloride analysis in acid copper plating baths The chloride concentration in an acid copper plating bath is determined from the chloride oxidation current measured under controlled hydrodynamic conditions at a noble metal electrode using specific voltammetric parameters. The measurement is made directly on the u... | 03/27/2012 |
| 7438796 | Electrochemical chlorine sensor A sensor for measurement of free chlorine and of total chlorine in aqueous solution including a working electrode having a self-assembled monolayer (SAM) formed on the surface thereof, producing a barrier which reduces the generation of background currents when elec... | 10/21/2008 |
| 7413645 | Devices, systems and methods for testing gas sensors and correcting gas sensor output A method of adjusting the output of an electrochemical sensor includes the steps of: simulating the presence of an analyte gas electronically; measuring a response of the sensor to the electronic simulation; and adjusting the output of the sensor as a function of th... | 08/19/2008 |
| 7371459 | Electrical devices having an oxygen barrier coating An electrical device includes two electrodes and a conductive polymer layer, containing a mixture of a polymer and a conductive filler, separating the electrodes. A oxygen barrier material containing a thermosetting polymer component is present on the exposed surfac... | 05/13/2008 |
| 7270736 | Electrode system for electrochemical sensor The system concerns an electrode system for an electrochemical sensor, comprising, arranged on a conductive substrate (10), a plurality of micro-discs (22) electrically connected to the substrate and a generating electrode (20) insulated from th... | 09/18/2007 |
| 7201831 | Impurity detection device There is provided a sample preparation device and method for preparing a sample of liquid for detection of impurities. First (40) and second (38) electrodes are provided, located for immersion in a liquid under test. A semipermeable membrane (42... | 04/10/2007 |
| 7179653 | Measuring method for concentration of halogen and fluorine compound, measuring equipment thereof and manufacturing method of halogen compound The present invention provided a method for measuring a halogen gas and/or a hydrofluorocarbon for the purpose of controlling the concentration of the halogen gas and/or the hydrofluorocarbon, in a plant producing a halogen compound or a perfluorocarbon, at a predet... | 02/20/2007 |
| 7110887 | Residual chlorine meter A residual chlorine meter detects a pre-calibration residual chlorine reaction amount of sample water in a detection section, inputs a calibration standard residual chlorine standard concentration of the sample water in an input section, determines calibration facto... | 09/19/2006 |
| 7084641 | Measuring cell and measuring field comprising measuring cells of this type, use of a measuring and use of a measuring field A measuring cell for recording an electrical potential of an analyte situated on the measuring cell. The measuring cell has a sensor, a layer arranged above the sensor and electrically insulating the analyte from the sensor, and an amplifier circuit connected to the... | 08/01/2006 |
| 7033483 | Fluoride-sensitive electrode A fluoride-sensitive electrode having a tubular electrode shaft, a lanthanum fluoride crystal, which closes the end of the electrode shaft, an internal electrolyte sealed between the lanthanum fluoride crystal and a closure in the electrode shaft, and a contact wire... | 04/25/2006 |
| 6972083 | Electrochemical method and system for monitoring hydrogen peroxide concentration in slurries Electrochemical monitoring system and method are provided for online determination of hydrogen peroxide concentration in slurries, e.g., a chemical mechanical polishing slurry. The monitoring system includes an electrochemical cell fluidly coupled to receive a slurr... | 12/06/2005 |
| 6903335 | Ion activity-measuring device and method for producing the same The ion activity-measuring device of the present invention is provided with a hydrophobic bridge of which portion contacting with a liquid reservoir is hydrophilic. The hydrophobic bridge is made of, for example, at least one selected from the group consisting of po... | 06/07/2005 |
| 6841060 | Method for quantifying antioxidant levels in food and medical specimens A simple analytical method for determining antioxidant level in food product and body fluids such as urine is based on reduction of elemental iodine. The method adds an aqueous solution of iodine and an iodophor to the sample to be tested. Polyvinylpyrrolidone is a ... | 01/11/2005 |
| 6740225 | Method for determining the amount of chlorine and bromine in water A thick film electrochemical microsensor device for measuring or regulating chlorine and bromine in water, comprising a substrate to which is applied an optimum arrangement of at least two electrodes. The device is especially useful for measuring or regulating chlor... | 05/25/2004 |
| 6673226 | Voltammetric measurement of halide ion concentration The concentration of chloride ion in an acid copper electroplating bath is determined from the effect that chloride exerts on the copper electrodeposition rate in the presence of organic additives. A cyclic voltammetric stripping (CVS) rate parameter is m... | 01/06/2004 |
| 6623647 | Methods of optimized control of multiple oxidizer feedstreams This invention is directed to a method and apparatus for controlling and optimizing the feed of two or more oxidizers to an aqueous stream, thereby providing a synergistic effect. The system combines the use of amperometric or ORP based sensor technology ... | 09/23/2003 |
| 6623616 | Corrosive environment monitor and methods regarding same A monitoring method and system to monitor an environment in which an object is located includes monitoring one or more environmental factors associated with corrosion of materials in the environment. Thereafter, an exposure index representative of cumulat... | 09/23/2003 |
| 6579434 | Electrode with reversibly sealed fluoride sensing crystal A free fluoride ion sensitive electrode with longer service life can be obtained by eliminating the use of any cement or similar adhesive to hold the fluoride sensing crystal of the electrode in place within the rest of the structure of the electrode, usi... | 06/17/2003 |
| 6432296 | Polymeric compositions for ion-selective electrodes Improved dry-operative ion-selective electrodes and their use are described. The dry-operative ion-selective electrodes include an internal reference electrode comprising a water-soluble salt dispersed in a polymer binder consisting essentially of a monom... | 08/13/2002 |
| 6372105 | Apparatus for measuring a silver or halogen ion concentration A method of producing a silver halide photographic emulsion in which a silver ion concentration in precipitation of a silver halide emulsion in a precipitation bath is controlled, wherein a precipitation bath in which stirring is conducted rapidly and uni... | 04/16/2002 |
| 6306284 | Apparatus and method for monitoring fluorine ions An apparatus and a method for determining concentration of fluorine ions in aqueous solutions are provided. In the apparatus, a pH sensor is provided for sensing a pH value of an aqueous solution to be determined. A pH controller is then used to compare t... | 10/23/2001 |
| 6270680 | Amperometric sensor probe for an automatic halogen control system An amperometric bromine control system accurately maintains a desired concentration of bromine within a home spa or in other water features. The control system employs amperometric sensing to measure the bromine concentration in the spa water and uses thi... | 08/07/2001 |
| 6197172 | Electrochemical sensor with gelled membrane and method of making An electrochemical sensor with a gelled membrane for prolonging the useful life of an ion-selective electrode. The gelled membrane is a hydrophilic membrane having a specially-formulated gel layer coated on one side. The gel-coated side of the gelled memb... | 03/06/2001 |
| 5948236 | Determination of chlorate ion concentration using microelectrodes An in-situ procedure is described for measuring chlorate ion concentration in aqueous media containing the same by employing electrodes, particularly microelectrodes which generate a sigmoidal-type response at high chlorate ion concentration, and which ex... | 09/07/1999 |
| 5910450 | Process and device for enriching gas, vapor and/or aerosol emissions released from an object A process for enriching substance emissions released from an object in the form of gases, vapors or aerosols, wherein the substance emissions are fed to an adsorption layer by diffusion or penetration and are enriched in the adsorption layer. The substanc... | 06/08/1999 |
| 5876578 | Gas sensor A gas sensor which can be used for measuring a low concentration repeatedly, which has a quick response and which can be used for a long time with high stability is provided. The gas sensor comprises a solid electrolyte, a detecting electrode provided in ... | 03/02/1999 |
| 5552032 | Solid state ion selective electrode and method of using the same A solid state ion-selective electrode device to detect a selected ion species in solution an electrode consisting of a homogeneous solid mixture. The mixture is a solid electrolyte composition possessing ionic conductivity and polyvinyl chloride, and opti... | 09/03/1996 |
| 5527711 | Method and reagents for binding chemical analytes to a substrate surface, and related analytical devices and diagnostic techniques A method is provided for detecting an analyte of interest in a sample. The method involves binding the analyte to the surface of a substrate through a biotin-biotin binding protein interaction, contacting the surface-bound analyte with a quantitatively de... | 06/18/1996 |
| 5514968 | Method for detecting the need for calibrating probes An in situ probe failure detection method for probes which deliver an electric signal on account of a change of the concentration of a substance to be measured. An example of such a probe failure may be caused by, for example, fouling of the membrane as t... | 05/07/1996 |
| 5456810 | Methods of measuring and controlling activity of zinc phosphate treatment solution A prescribed amount of a simple fluoride is added to a zinc phosphate treatment solution, which is a target solution, the HF concentration in the target solution is measured with a silicon electrode meter after the addition, and the concentration of the c... | 10/10/1995 |
| 5441611 | Method for determining and controlling the concentration of active substances included for cleaning and disinfection in aqueous cleaning and disinfecting solutions The invention concerns a method of determining the concentration of an iodine-iodide-containing active substance in aqueous solutions intended for use in the cleaning or disinfection of containers such as bottles, drums, kegs, cases and tanks and/or pipe ... | 08/15/1995 |
| 5437772 | Portable lead detector Apparatus and methods for quickly and easily detecting trace amounts of metallic or non-metallic, electro-active substances, and in particular trace amounts of metals, such as lead in a portable, hand-held detector system with single potential control.... | 08/01/1995 |
| 5437773 | Method for monitoring environmental and corrosion A corrosion sensor array incorporating individual elements for measuring various elements and ions, such as chloride, sulfide, copper, hydrogen (pH), etc. and elements for evaluating the instantaneous corrosion properties of structural materials. The exac... | 08/01/1995 |
| 5403451 | Method and apparatus for pulsed electrochemical detection using polymer electroactive electrodes In a first embodiment, a target analyte in solution is detected by exposing the solution to an electrode that includes a conducting electroactive polymer to which a periodic alternating voltage is coupled. Upon exposure to the analyte, an electrode charac... | 04/04/1995 |
| 5324665 | On-line method for monitoring chloride levels in a fluid stream A method for monitoring automatically, on-line chloride content in a fluid stream in an oil refinery. Additionally, the present invention provides a method for neutralizing the acids resulting from the chloride in a fluid stream. Pursuant to the method, a... | 06/28/1994 |
| 5300442 | Method and device for measuring chlorine concentrations with enhanced sensitivity A method and apparatus for measuring the amount of residual chlorine in solution with enhanced accuracy. The basic measurement technique involves introducing a solution of iodide ion into the sample to reduce the chlorine, thereby producing a proportionat... | 04/05/1994 |
| 5271819 | Method of detection using sensor electrode A sensor electrode and method for detecting select characteristic in a liquid. The method utilizes filters and adsorbent materials to selectively remove contaminants in the liquid. The improvement comprises back flushing the filters and adsorbent material... | 12/21/1993 |
| 5269832 | Method and apparatus for continuously measuring the concentration of chemicals in solutions A method and apparatus for continuously monitoring the concentration of a target chemical in a solution, such as chlorine dioxide in sewage or waste water, includes a holding tank, a bubbler chamber, and an air pump for directing air bubbles through the s... | 12/14/1993 |
| 5139626 | Ion concentration measurement method An electrochemical cell is formed by immersing an electrochemical ion sensor and a reference electrode into a solution of interest, the electrochemical ion sensor exhibiting ion selectivity with respect to an ion of interest and having a high electrode re... | 08/18/1992 |
