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| Number | Title | Issue Date |
| 7988916 | Apparatus for mixing and/or testing small volumes of fluids An apparatus and method for measuring a range of small volumes of fluids to a high degree of precision, said apparatus including: a) a single reaction chamber (20); b) a piston (30) operable within said chamber to selectively and precisely vary the int... | 08/02/2011 |
| 7968053 | Chlorine analyzing apparatus A chlorine analyzing apparatus includes a reaction tube of a double tube structure with an inner tube for receiving a sample and an outer tube for recovering hydrogen chloride. An electric furnace has a reaction tube insertion hole into which the reaction tube is in... | 06/28/2011 |
| 7367243 | Traps and vents in flow-through pipet This invention relates generally to a volumetric pipet used to make a volumetric measurement and transfer a measured amount of liquid. More specifically the invention relates to a pipet that fills from the top, works well with automated systems because it does not r... | 05/06/2008 |
| 7349760 | System and method for sensing and controlling the concentration of a chemical agent in a solution A system for measuring and controlling the concentration of a chemical agent in a solution has a reaction cell for receiving a sample, a titrant dropper for releasing one or more drops of titrant into the sample, a first photosensor for sensing disruptions of light ... | 03/25/2008 |
| 7318913 | Fluid exchange in a chamber on a microscope slide A sample chamber is formed by a housing sealed against a microscope slide. The housing has fluid ports, including a well formed over at least one port. In a rinse station, rinse solution is drawn from a reservoir through the chamber to a waste reservoir. At a fill s... | 01/15/2008 |
| 7214537 | Real-time component monitoring and replenishment system for multicomponent fluids A multicomponent fluid composition monitoring and compositional control system, in which a component analysis is effected by titration or other analytical procedure, for one or more components of interest, and a computational means then is employed to determine and ... | 05/08/2007 |
| 7214529 | Nucleic acid amplification reaction station for disposable test devices An instrument for conducting nucleic acid amplification reactions in a disposable test device. The test device includes a first reaction chamber containing a first nucleic acid amplification reagent (e.g., primers and nucleotides) and a second reaction chamber eithe... | 05/08/2007 |
| 7205153 | Analytical reagent for acid copper sulfate solutions Embodiments of the invention provide an analytical method and analytical reagent solutions for determining the concentration of electrolyte components, such as copper, acid and chloride constituents in an acid or basic metal plating bath using a chemical analyzer. C... | 04/17/2007 |
| 7199088 | Lubricating oil for a diesel powered engine and method of operating a diesel powered engine A lubricating oil composition useful for a diesel-powered engine is provided that reduces NOx emissions level produced from a diesel-powered engine. The lubricating oil comprises a base oil and at least one oil-dispersible source of HNCO such as isocyanates. A metho... | 04/03/2007 |
| 7153690 | Real-time component monitoring and replenishment system for multicomponent fluids A multicomponent fluid composition monitoring and compositional control system, in which a component analysis is effected by titration or other analytical procedure, for one or more components of interest, and a computational means then is employed to determine and ... | 12/26/2006 |
| 7049146 | Calibration standards, methods, and kits for water determination The present invention relates to a formed tablet calibration standard-reagent for Karl Fischer reactions to determine the water content of substances, such as pharmaceuticals, food stuffs, and oils. ... | 05/23/2006 |
| 6979569 | Apparatus and method for mixing fluids for analysis In an apparatus for fluid analysis, a plurality of reagent-mixture components are each injected by a respective pump through a valve matrix and into a flow-injection unit. The flow-injection unit defines a mixing chamber including a plurality of. As the reagent-mixt... | 12/27/2005 |
| 6958113 | Plating apparatus and plating method A plating apparatus for plating a substrate. The apparatus is provided with a plating unit, a substrate cleaning unit, a substrate transport mechanism, a post-treatment agent supplying section, a minor constituent managing section for managing minor constituents (an... | 10/25/2005 |
| 6948390 | Flow through pipet The present invention is directed to a flow through pipet for sample measurement. The pipet of the invention has a body defining an interior space for receiving a fluid. The drain line is provided to drain fluid above a drain line inlet, thereby establishing a repea... | 09/27/2005 |
| 6783991 | Reversible and reusable authentication system for secure documents The invention is a method and system that is useful to authenticate security paper. Specifically, the present invention relates to a method and system that allows security paper to be authenticated more than once without destroying the authentication mechanism. An a... | 08/31/2004 |
| 6780646 | Method for determining the storability of a grain or oilseed sample The rate of carbon dioxide release from a grain sample can be measured by placing the grain sample in a sealed container, and positioning a pH responsive color-change material in the container so that carbon dioxide released from the grain sample chemically reacts w... | 08/24/2004 |
| 6537822 | Method for analyzing free fluorine in solutions containing hydrofluoric acid solution, and apparatus for practicing the method Free fluorine is measured in a hydrofluoric acid-containing solution with a coexistent metallic ion based on a total fluorine concentration, a total acid concentration, a metallic ion concentration, the equilibrium constant of hydrofluoric acid, and equil... | 03/25/2003 |
| 6495372 | Field test apparatus and method for analysis of coolants and heat-exchange fluids A test method and apparatus for determining the content of carboxylic acid-based corrosion inhibitors in a coolant or heat exchange fluid. The amount of acidic reagent added to the coolant or fluid between two pH equilibrium points is measured to determin... | 12/17/2002 |
| 6475438 | Field test apparatus for analysis of coolants and heat-exchange fluids A test method and apparatus for determining the content of carboxylic acid-based corrosion inhibitors in a coolant or heat exchange fluid. The amount of acidic reagent added to the coolant or fluid between two pH equilibrium points is measured to determin... | 11/05/2002 |
| 6372505 | Process and apparatus for titrating In a process for titrating substances by adding increments of a titrant in time intervals, the course of the reaction is monitored in its approach toward the end point (EP), and the addition of titrant is controlled. At least one differential component is... | 04/16/2002 |
| 6315954 | Acid or base generator and analyzer An apparatus for generating high purity acid or base in an aqueous stream for use in analysis. For generating a base, the aqueous stream is directed through a cation exchange bed having first strongly acidic and second weakly acidic portions. An electrica... | 11/13/2001 |
| 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 |
| 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 |
| 6096274 | Analysis device The invention relates to an analysis device with a multi-way valve which is connected, via a pump line, to a bidirectional pump. A storage member for storing a sample fed to it and any auxiliary substances is accommodated in the pump line. The multi-way v... | 08/01/2000 |
| 5994147 | System and method for determining acid-gas (CO2, H2 S) loadings in an alkanolamine system A method for determining the concentration of acid-gases in an amine-regeneration system, such as is typically found in a natural gas refining plant, having a device for measuring the pH of the system from which the concentration of the acid-gases complex... | 11/30/1999 |
| 5980829 | Neutralization testing apparatus A neutralization testing apparatus and a neutralization testing method which allow a neutralization reaction rate of a liquid sample such as lubricant oil to be accurately measured are provided. Reagent injecting device for injecting a reagent which neutr... | 11/09/1999 |
| 5817954 | Automated analyzing apparatus for measuring water quality with a cylinder-shaped syringe unit The present invention provides an automated analyzing apparatus which comprises: a syringe unit for inhaling or transfering liquid such as sample, reagents and washing solution by moving the piston (12) by a certain distance; a built-in stirring bar (31) ... | 10/06/1998 |
| 5800782 | Apparatus for quantitative determination of total base or acid number of oil The total base number of an oil sample of measured volume is determined by solvating the oil sample, adding a predetermined amount of acidic species to the solvated sample to react the acidic species with any basic species contained in the oil sample, ext... | 09/01/1998 |
| 5776418 | Automated analysis apparatus having fixed cells An apparatus is proposed making it possible in automated manner to perform several analyses on the same sample. For this purpose several fixed, chemical preparation cells (10) can separately receive several fractions of the same sample. Reagent injection ... | 07/07/1998 |
| 5770150 | Test kit for the qualitative determination of peroxides in fat A process and test kit for the rapid qualitative determination of fat oxidation based on an iodometric method for peroxide value and employing ready-made test solutions is disclosed. A visible color change is used to determine whether a fat sample contain... | 06/23/1998 |
| 5747350 | System for dosing liquids A system for dosing liquids includes a dosing device, a device for operating the dosing device, a device for entering data and a unit for calculating the dosing displacement. Data are allocated to a dosing device according to the invention which are chara... | 05/05/1998 |
| 5721143 | Surfactant/detergent titration analysis method and apparatus for machine working fluids, surfactant-containing wastewater and the like The present invention is an improved method and related apparatus for quantitatively analyzing machine working fluids and other aqueous compositions such as wastewater which contain various mixtures of cationic, neutral, and/or anionic surfactants, solubl... | 02/24/1998 |
| 5707871 | Method and kit for testing polyolester lubricants used in refrigerant compressors Both a method and a kit for testing the fitness of a polyolester lubricant of the type used in a refrigerant compressor are provided. In the method of the invention, a solution for indicating an excess acidity of the polyolester lubricant is obtained by m... | 01/13/1998 |
| 5670374 | Method and test kit for the qualitative determination of peroxides in fat A process and test kit for the rapid qualitative determination of fat oxidation based on an iodometric method for peroxide value and employing ready-made test solutions is disclosed. A visible color change is used to determine whether a fat sample contain... | 09/23/1997 |
| 5618495 | Colorimetric titration method and apparatus The invention relates to colorimetric titration method, a titrator and colorimeter device. The titrating apparatus comprises radiant energy means for producing radiant energy. The device includes means for modulating an amplitude of an intensity of the ra... | 04/08/1997 |
| 5389546 | Method for determining and monitoring constituent concentration of an aqueous metalworking fluid The total alkalinity of an aqueous metalworking fluid is monitored and controlled by a continuous titration method that continuously supplies a stream of the metalworking fluid, at a known, controllable flow rate, to a flow through chamber having therein ... | 02/14/1995 |
| 5368819 | Automated process chloride analyzer An automated analysis system is provided for the determination of impurities in a liquified hydrocarbon stream. The system employs a hydrocarbon capture vessel for capturing a hydrocarbon sample, a water scrubbing vessel for extracting impurities from the... | 11/29/1994 |
| 5366898 | Method for quantitative determination of total base or acid number of oil The total base number of an oil sample of measured volume is determined by solvating the oil sample, adding a predetermined amount of acidic species to the solvated sample to react the acidic species with any basic species contained in the oil sample, ext... | 11/22/1994 |
| 5340541 | Automated Karl Fischer titration apparatus and method Automation of the coulometric Karl Fischer titration has allowed for the accurate, precise determination of moisture content of lyophilized hGH formulations. The system of the present invention utilizes a vented, two-hole sampling/dispensing probe that di... | 08/23/1994 |
| 5328662 | Installation for carrying out several successive chemical reactions in the same container The disclosure describes an apparatus for performing at least two successive chemical reactions in the same container. In order to successively carry out several chemical reactions in the same container (10), e.g. dosing uranium in the presence of plutoni... | 07/12/1994 |
