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| Number | Title | Issue Date |
| 7407625 | Volume-differential water assay system using hydrophilic gel Systems and methods for measuring the moisture and sediment content of a petroleum sample. In one embodiment, a sample to be tested is collected in a field bottle. The sample from the field bottle is then transferred from the field bottle, and into and through a mea... | 08/05/2008 |
| 7354768 | Volume-differential assay using hydrophilic gel Systems and methods for measuring the moisture and sediment content of a petroleum sample. In one embodiment, a sample to be tested is collected in a field bottle. The sample from the field bottle is then transferred from the field bottle, and into and through a mea... | 04/08/2008 |
| 7282349 | Solvatochromatic bacterial detection Solvatochromic dyes are used herein to indicate the presence of bacteria by incorporating them into various substrates such as films, woven and nonwoven fabrics, paper towels, coform and airlaid materials and bonded carded webs. These dyes change color in response t... | 10/16/2007 |
| 7247485 | Karl Fischer reagent Karl Fischer reagent comprising iodide, sulphur dioxide with an initial concentration above 0.5 M, and imidazole/imidazole derivative dissolved in alcoholic solvent, whereby the molar ratio between the initial imidazole/imidazole derivative concentration and the ini... | 07/24/2007 |
| 7189571 | Method for trace water analysis in cyclic siloxanes useful as precursors for low dielectric constant thin films An analytical technique for the accurate and precise measurement of trace water in chemical reagents, comprising the steps of combining a chemical reagent comprising ≦5 ppm water, with hexafluoroacetone (HFA), to form a sample mixture comprising at least the chemi... | 03/13/2007 |
| 6904865 | Wetness indicator having improved colorant retention and durability Wetness indicating compositions having improved colorant retention and durability and to wearable articles comprising this wetness indicating composition are provided. ... | 06/14/2005 |
| 6833273 | Method for evaluating concentration of metallic impurities in silicon wafer A method for evaluating concentration of metal impurities contained in a silicon wafer, which comprises dropping concentrated sulfuric acid onto a surface of the silicon wafer to extract metal impurities solid-solubilized in the inside of the silicon wafer into the ... | 12/21/2004 |
| 6387705 | Alkylation process using refractive index analyzer An alkylation process that employs a refractive index analyzer to monitor, control, and/or determine acid catalyst strength before, during, or after the alkylation reaction. In a preferred embodiment, the invention relates to the alkylation of an olefinic... | 05/14/2002 |
| 6376250 | Composition and probe for detection of water A visual indicating paste composition for detecting of aqueous solutions in hydrocarbons by changes in color. The paste is utilized by placing on a probe and inserting the probe in a storage device for fuel. Said paste comprising: a) a liquid carrier sele... | 04/23/2002 |
| 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 |
| 6194215 | Method and device for the continuous measurement and control of the composition of a wetting-agent solution for offset printing The wetting-agent solution proposed contains of water and at least one organic solvent miscible with water. The speed of sound in the solution is measured and, from the value obtained, a control signal is generated to keep the composition of the solution ... | 02/27/2001 |
| 6117682 | Method for detecting hydrocarbons in water The presence of hydrocarbons in water is detected by contacting a water sample with an adsorbent material to extract hydrocarbons from the water sample and then contacting the adsorbent material with a solvent for the hydrocarbons. A developer such as a m... | 09/12/2000 |
| 6096553 | On-line analysis of acid catalyst in an alkylation process A computer implemented method for on-line determination of concentrations in an HF alkylation process catalyst stream containing HF acid, ASO, water and optionally an additive which suppresses the vapor pressure of HF acid. The method employs near-infrare... | 08/01/2000 |
| 5928950 | Method for detecting hydrocarbons in soil The presence of hydrocarbons in soil is detected by immersing a soil sample in a water-miscible solvent capable of dissolving the hydrocarbons to extract hydrocarbons from the soil into the solvent. An aqueous developer is mixed into the solvent to produc... | 07/27/1999 |
| 5756357 | Method for detecting hydrocarbons in soil The presence of hydrocarbons in soil is detected by immersing a soil sample in a water-miscible solvent capable of dissolving the hydrocarbons to extract hydrocarbons from the soil into the solvent. An aqueous developer is mixed into the solvent to produc... | 05/26/1998 |
| 5679574 | Quantitative test for oils, crude oil, hydrocarbon, or other contaminants in soil and a kit for performing the same A method for the quantitative determination of oil in a soil matrix is provided, in which the method involves: extracting a soil sample with a solvent in the presence of a drying agent to provide an extract containing oil, if present in the soil sample, w... | 10/21/1997 |
| 5477716 | Apparatus for monitoring moisture in a gas stream A device is provided comprising a piezoelectric material and at least one non-crystalline non-crystalline metal oxide, crystalline-non-zeolite metal oxide and mixtures thereof coating chemically reactive with trace quantities of water in chemically reacti... | 12/26/1995 |
| 5395768 | Method to evaluate the Rwb parameter of the dual water log interpretation model A method is described to evaluate the Rwb parameter, which can be applied to the Dual Water log interpretation model by measuring the resistivity of initial brines and of filtrates from muds prepared with shales. The method allows a more precis... | 03/07/1995 |
| 5306643 | Method for detecting low levels of alkylbenzene or mineral oil in polyol ester lubricants in the compressors A method for detecting low level of alkylbenzene or mineral oil impurity in polyol ester lubricants for compressors. This method comprises mixing a mixture of alcohol and water with a sample of the lubricant and then observe the presence or absence of tur... | 04/26/1994 |
| 5301543 | Moisture monitor in a non-conductive liquid media A moisture monitor for determining the amount of moisture in liquids which may include direct installation into a non-conductive liquid flow line or, a detection chamber having a continuous flow of contaminated non-conductive liquid therethrough, and a pr... | 04/12/1994 |
| 5229295 | Method for testing gasoline for water and alcohol in the presence or absence of the other An environmentally compatible method for field testing gasoline, and other liquid hydrocarbons, for the presence of water and/or alcohol in the presence or absence of the other utilizing colorimetric reagents comprising methylene blue dye, anhydrous sodiu... | 07/20/1993 |
| 5095844 | Water in oil detection plug A water detection plug for use in a marine engine or the like having lubricants such as oil contained therein including an arrangement for indicating the presence of water in the lubricant when the water is in contact with the plug such that the indicator... | 03/17/1992 |
| 5048334 | Method and apparatus for subterranean liquid level measurement A method and an apparatus for determining the thickness of a layer of a first liquid above an interface formed by the first liquid and the second liquid underlying the first liquid in a subterranean formation. The apparatus includes an elongated metal rod... | 09/17/1991 |
| 4970170 | Liquid chromatographic determination of water A sensitive method for the determination of water in the presence of common interferences is presented. The detection system is based on the effect of water on the equilibrium which results from the reaction aryl aldehydes, such as cinnamaldehyde and meth... | 11/13/1990 |
| 4962039 | Simple and rapid method for detecting the presence of water in various organic fluids A method for determining the presence of water in an organic test fluid including the steps of admixing a portion of the organic test fluid with a liquid indicator system containing a non-polar solvent which is soluble in the organic test fluid, and compr... | 10/09/1990 |
| 4717671 | Stabilized water indicating paste composition A visual indicating paste composition for producing a detectable color change upon contact with an aqueous solution comprising an indicator dye capable of changing color in the pH range between about 7 and about 11, an inorganic base in the form of a caus... | 01/05/1988 |
| 4699885 | Composition and probe for detection of water A visual indicating paste composition for producing a detectable color change upon contact with an aqueous solution comprising an indicator dye capable of changing color in the pH range between about 7 and about 11, said base being dispersed in a liquid c... | 10/13/1987 |
| 4677076 | Process for determining water in samples containing water The invention relates to a process for determining water in samples containing water. This process is characterized in that a solvatochromic compound is added to a solution or dispersion of the sample in a solvent or directly to the liquid sample, the sol... | 06/30/1987 |
| 4677079 | Process for determining the composition of binary liquid mixture The invention relates to a process for determining the composition of binary liquid mixtures. This process is characterized in that a solvatochromic compound is added to the sample to be analyzed, the solvatochromism band λmax is determined in... | 06/30/1987 |
| 4578357 | Stabilized water indicating paste composition A visual indicating paste composition for producing a detectable color change upon contact with an aqueous solution comprising an indicator dye capable of changing color in the pH range between about 7 and about 11, an inorganic base in the form of a caus... | 03/25/1986 |
| 4577978 | Field test for determining water in oil A semi-quantitative method for determining the amount of water in contaminated oil samples wherein a small sample of contaminated oil is placed in one or more compartments of a container. An equal size sample of reference oil of the same composition as th... | 03/25/1986 |
| 4557899 | Water-in-oil testing apparatus Apparatus is described which is useful for determining the water content of a petroleum product. The apparatus includes a reaction vial disposed within a tubular member containing a fluid. As the petroleum product reacts with a reactant in the vial a gas ... | 12/10/1985 |
| 4388407 | Process and apparatus for the rapid determination of the characteristics of a petroleum pollutant Process and apparatus for on the site determination of the characteristics of an oil-pollutant containing water. The determinaton includes the use of a combination of devices designed to permit the on-site determination of the water content and specific g... | 06/14/1983 |
| 4257775 | Determination of water content in various systems The invention deals with the determination of water content in many systems, as the basis for the method, as, for example, in oil- and water-containing emulsions, using adsorbent solids and the temperature rise caused upon adsorption of water thereby.... | 03/24/1981 |
| 4231752 | Method of determining salt water in oils The presence of salt water in marine oils is determined aboard ship by using a unique combination of reagents comprising a halogenated hydrocarbon, an inorganic salt solution and an alcohol to efficiently separate the water and then using a salt-impregnat... | 11/04/1980 |
| 4198207 | Determination of water content in presence of oils The invention deals with the determination of water content in presence of oils, as, for example, oil- and water-containing emulsions, using zeolites and the temperature rise caused upon adsorption of water as the basis.... | 04/15/1980 |
| 4151256 | Water-in-oil detection device A device for detecting the presence of small quantities of water in oil and other petroleum products comprises a container with an associated sample cup for a predetermined quantity of oil whose water content is to be measured, a collector vessel attached... | 04/24/1979 |
| 4102647 | Removal of condensates from light gaseous streams A process for removing condensates from light gaseous streams comprises passing the stream over an oleophilic substance, that is, a substance which retains liquid hydrocarbon compounds. Said substance is preferably an aromatic polymer such as a polystyren... | 07/25/1978 |
| 4089652 | Detection of water in oil A method of detecting water in an oil comprises bringing a sample of the oil into contact with a substance which is chemically inert to the oil but reactive with water to produce gas. The amount of gas produced is measured by the displacement of liquid fr... | 05/16/1978 |
| 4005132 | Process for reacting trialkyl boranes with compounds containing protons Trialkyl boranes are reacted with compounds containing protons in the presence of catalytic amounts of carboxylic acid derivatives, especially derivatives of t-alkyl carboxylic acids, thereby highly increasing the rate of protolyses of trialkyl boranes. T... | 01/25/1977 |
