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| Number | Title | Issue Date |
| 7989211 | Functionalized gold surface-enhanced raman scattering substrate for rapid and ultra-sensitive detection of anionic species in the environment This invention relates to the development of a new Raman enhancing reagent and a surface-enhanced Raman scattering (SERS) method for rapid and ultra-sensitive detection and identification of perchlorate (ClO4−) and other anions such as techne... | 08/02/2011 |
| 7390668 | Intracorporeal medicaments for photodynamic treatment of disease New intracorporeal photodynamic medicaments and certain medical uses and methods for use of such photodynamic medicaments for treatment of disease in human or animal tissue are described, wherein a primary active component of such medicaments is a halogenated xanthe... | 06/24/2008 |
| 7374940 | Method and apparatus for determining the progress of a uranium oxyfluoride conversion reaction in a furnace and for controlling the reaction A substance in a condensed state, for example a powdered solid, is in continuous movement in the longitudinal direction (6) of a furnace (4, 5). A reactive gas mixture is brought into contact with the substance in the condensed state. A plurality of sa... | 05/20/2008 |
| 7273588 | Methods of sampling halosilanes for metal analytes Methods for determining the amount of at least one metal analyte present in a liquid or gas sample of a halosilane supply (e.g., a chlorosilane supply) are disclosed herein. A sample of a halosilane supply is contacted and reacted with an aqueous hydrofluoric acid s... | 09/25/2007 |
| 7058108 | Carbon dioxide laser resonator gas The present invention is directed, in part, to a carbon dioxide laser resonator gas comprising carbon dioxide, helium, and nitrogen and having a total halocarbon concentration less than about 100 parts per trillion. In one embodiment, the total halocarbon concentrat... | 06/06/2006 |
| 6902937 | Method for the determination of low-concentration anions in the presence of an excess of another anion This invention relates to methods and apparatus for detecting, quantifying, and/or identifying trace quantities of an anion in the presence of an excess of another anion. One apparatus comprises a sample loop having a first end adapted to be connected to a sample-in... | 06/07/2005 |
| 6773925 | Detector agent for halogen compounds and method for detecting halogen compounds There are provided a detector agent which is effectively discolored at a lower concentration for various halogen compounds and a method for detecting halogen compounds by use of said detector agent. A detector agent for halogen compounds, which contains curcu... | 08/10/2004 |
| 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 |
| 6541263 | Determination of corticosteroids in human plasma using micromass LC/MS/MS The present invention is directed to a method of detecting a corticosteroid in a sample by adding an internal standard to a sample suspected of containing a corticosteroid; removing interfering compounds from the sample; placing the sample on an HPLC colu... | 04/01/2003 |
| 6479018 | Detection of a gaseous substance emanating from a layer of polymeric composition Detection of an evolving or diffusing gaseous substance emanating from an irradiated or thermolyzed layer of polymeric composition in semiconductor processing or similar processes is disclosed. The evolving or diffusing gaseous substance is detected by sp... | 11/12/2002 |
| 6228650 | Acid catalyst regeneration control In an HF alkylation process where an acid catalyst regeneration column separates HF acid from ASO and water to provide regenerated catalyst for a catalyst circulation stream, and where buildup of ASO in the catalyst circulation stream is encountered, an i... | 05/08/2001 |
| 6177279 | Ion extraction process for single side wafers A process for extracting inorganic ionic contaminants from a front surface of a silicon wafer for chemical analysis. The wafer is placed in a container upon a support which holds the wafer in a generally level orientation and isolates the wafer to inhibit... | 01/23/2001 |
| 6117686 | Method for detecting harmful gases which is applicable to broad gas concentration range The present invention provides a method by which harmful trace gases in a gaseous mixture containing as such harmful halogen gases, halogenated hydrogen gases, acid gases, oxidizing gases, basic gases, organic acid gases, especially halogen gases or halog... | 09/12/2000 |
| 6103487 | Method of treating cancer The instant invention provides for a method of inhibiting prenyl-protein transferases and treating cancer which comprises administering to a mammal a prenyl-protein transferase inhibitor which is efficacious in vivo as an inhibitor of geranylgeranyl-prote... | 08/15/2000 |
| 6096557 | Gas detection method and apparatus using gas reactive pigment This invention provides a method for determining the concentration of a gas to be detected by a gas detector using a gas reactive pigment, wherein the dynamic range of the detectable concentration can be controlled. The method comprising bringing a gas to... | 08/01/2000 |
| 5952237 | Method for detecting harmful gases which is applicable to broad gas concentration range The present invention provides a method by which harmful trace gases in a gaseous mixture containing as such harmful halogen gases, halogenated hydrogen gases, acid gases, oxidizing gases, basic gases, organic acid gases, especially halogen gases or halog... | 09/14/1999 |
| 5869007 | Conducting polymer based acid/base sensors Acid/base measuring sensor systems consisting of arrays of basic sensor cells are described which are constructed based on the chemical/electrical response characteristics of poly(aromatic amines). Protonation (doping) or deprotonation (de-doping) of the ... | 02/09/1999 |
| 5811254 | Broad range total available chlorine test strip A composition, method, and test device for determining the total available chlorine concentration of a test sample are disclosed. The test device includes a test pad having a suitable carrier matrix incorporating an indicator reagent composition capable o... | 09/22/1998 |
| 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 |
| 5665604 | Method and apparatus for detecting halogenated hydrocarbons A halogenated hydrocarbon (HHC) detector is formed from a silent discharge (also called a dielectric barrier discharge) plasma generator. A silent discharge plasma device receives a gas sample that may contain one or more HHCs and produces free radicals a... | 09/09/1997 |
| 5654201 | Chlorine quality monitoring method An apparatus and method for monitoring the product quality of chlorine in which a sample stream of chlorine is taken from a chlorine stream and a portion of the sample stream is passed to one of three different analyzers for detection of various contamina... | 08/05/1997 |
| 5650329 | Acid indicators Safety apparel for use in harardous environments has an indicating material incorporated in the surface of the apparel. On exposure to hazardous materials, such as acids and bases, the surface changes color to indicate exposure and provide a warning. Furt... | 07/22/1997 |
| 5641686 | Flow injection trace gas analysis method for on-site determination of organoarsenicals A method for real-time determination of the concentration of Lewisite in the ambient atmosphere, the method includes separating and collecting a Lewisite sample from the atmosphere in a collection chamber, converting the collected Lewisite to an arsenite ... | 06/24/1997 |
| 5489535 | Chlorine quality monitoring system and method An apparatus and method for monitoring the product quality of chlorine in which a sample stream of chlorine is taken from a chlorine stream and a portion of the sample stream is passed to one of three different analyzers for detection of various contamina... | 02/06/1996 |
| 5466605 | Method for detection of chemical components A chemical switch device and method of sensing the presence of a chemical constituent in an ambient environment, the chemical switch device comprising a film which irreversibly reacts upon exposure to specific chemical components in the environment under ... | 11/14/1995 |
| 5445964 | Dynamic engine oil and fuel consumption measurements using tunable diode laser spectroscopy A method is provided for precisely and concurrently measuring dynamic engine oil consumption and fuel consumption within an internal combustion engine on a real-time basis. Nonradioactive organo- bromine or chlorine compounds are added to the oil in small... | 08/29/1995 |
| 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 |
| 5286358 | Method of analyzing the complexing power of a pickling liquor A method is provided for accurately determining the complexing capacity (or free HF concentration) of a pickling liquor. A sample of pickling liquor is obtained and an excess of ferric ion is added thereto to complex with all of the free HF in the sample.... | 02/15/1994 |
| 5262304 | Method for optical measurement of bilirubin and reagent therefor A method for optical measurement of bilirubin which comprises reacting a bilirubin-containing sample with a zinc compound, a coloring agent and bilirubin oxidase in a buffer, wherein a stable green pigment having a large molecular extinction coefficient i... | 11/16/1993 |
| 5246868 | Infrared emission detection Apparatus and method for qualitatively and quantitatively analyzing infrared emission from excited molecules in samples of interest is disclosed. Over the wavelength interval from 1 to 5 um, two strong emission bands are observed with a PbSe detector when... | 09/21/1993 |
| 5173407 | Method for measuring glycosyltransferase There is disclosed a method for measuring a glycosyltransferase, for measuring an activity or a concentration of the glycosyltransferase for a specific sugar, which comprises using a constitution containing a donor which is not labelled and a substance wh... | 12/22/1992 |
| 4978364 | Triiodide-phosphoric acid stain and method for cellulose fiber evaluation A triiodide-phosphoric acid stain when applied to either moist or dry fiber samples produces a range of colors indicative of the fiber species and the degree of refining of the fiber. The stain is made from an aqueous triiodide solution of about 0.6M in p... | 12/18/1990 |
| 4339243 | Stabilization of benzidine-type indicators with various enhancers An improved composition, device and method, whereby enhanced sensitivity is achieved in detecting test sample constituents such as glucose and blood. The improvement resides in the use of a broad range of compounds as enhancers for benzidine-type indicato... | 07/13/1982 |
| 4339242 | Stabilization of benzidine-type indicators with various enhancers An improved composition, device and method, whereby enhanced sensitivity is achieved in detecting test sample constituents such as glucose and blood. The improvement resides in the use of a broad range of compounds as enhancers for benzidine-type indicato... | 07/13/1982 |
| 4311485 | Method and apparatus for photometrically monitoring the concentrations of both chlorine and chlorine dioxide A method and an apparatus for photometrically analyzing a stream under test containing both chlorine and chlorine dioxide is characterized by heating a portion of the stream to decompose any chlorine dioxide therein into elemental chlorine. This heated po... | 01/19/1982 |
| 4290775 | Analytical method for determining acid/salt and base/salt species concentration in solution Analytical method based on converting an acid or base species to water or absorbing the acid species whereby the species of interest is no longer responsive to a detector. Interfering salt(s) is simultaneously converted to a detectable acid or hydroxide d... | 09/22/1981 |
| 4224283 | Purification of hydrocarbons In the purification of hydrocarbon streams containing HF by chemical reaction with potassium hydroxide, a small portion of the hydrocarbon stream containing HF is passed through a small test bed of solid KOH; and when excess HF is present in the hydrocarb... | 09/23/1980 |
| 4219398 | Apparatus for continuous measurement of gas traces with ion-sensitive electrodes The method is based on the gas which is to be examined being absorbed in a flowing liquid and then dissociated. The ions formed are detected with an ion-sensitive electrode. In order to obtain a high solubility and thus a high sensitivity, the absorption ... | 08/26/1980 |
| 4118194 | Sensor for fluid components An electrochemical device for sensing fluid components, particularly gases, comprises a composition with which the component reacts to liberate elemental chlorine, bromine, fluorine or iodine. The chlorine, bromine, fluorine or iodine passes through a par... | 10/03/1978 |
| 4056609 | Article for diagnosis of achlorhydria There is disclosed an article for diagnosis of achlorhydria which includes an agent which is readily detectable when released in the stomach, the agent being enclosed in a fluid-impervious entrapping medium which is degraded in acidic fluids to release th... | 11/01/1977 |
