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Searching: chemistry





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Patent # Description
US-5,399,590 Quaternary ammonium salts and pharmaceutical compositions containing them
The invention relates to the field of organic chemistry and more particularly to that of therapeutic chemistry. More particularly it relates to new quaternary...
US-5,399,497 Capsule chemistry sample liquid analysis system and method
An analysis method and apparatus comprises feeding a stream of fluid capsules in a fluid conduit for flow therethrough by forming a film of isolating liquid on...
US-5,398,268 Nuclear power plant having a water chemistry control system for a primary cooling system thereof and an...
A water chemistry factor which is specific to a specific portion of a primary cooling system and universal is decided to be a standard target. The concentration...
US-5,397,534 Method for controlling crevice chemistry on the secondary side of a pressurized water reactor steam generator
A method for detecting pH imbalances and/or achieving pH balance in crevices of a pressurized water reactor steam generator. The method comprises obtaining...
US-5,393,635 Chelating negative charge director for liquid electrographic toner
The invention is a negative charge director for liquid electrographic toners. The charge director comprises a very weakly associating, charged functional group...
US-5,393,609 Weatherable powder coatings
This invention provides weatherable thermosetting powder coating compositions based on 1,2-cyclohexanedicarboxylic acid and ...
US-5,389,523 Liposome immunoanalysis by flow injection assay
A method of immunoanalysis combines immobilized immunochemistry with the technique of flow injection analysis, and employs microscopic spherical structures...
US-5,389,229 Prestabilization of particulate matter prior to their dispersion
Disclosed is a method for the plating of a substrate with a composite coating bearing a metallic matrix with finely divided particulate matter dispersed therein....
US-5,389,135 Chemistry to prevent the build up of hard ash deposits on equipment
The instant invention comprises a method of preventing ash deposition on equipment comprising adding a hemicellulose extract to phosphonate to form a mixture....
US-5,389,118 Abrasive tool having film-covered CBN grits bonded by brazing to a substrate
The invention concerns in one aspect a CBN abrasive tool comprising a metal, ceramic or cemented carbide substrate and a single layer of CBN grits bonded to said...
US-D354,559 Blood chemistry sensor assembly
US-5,380,804 1,3,5-tris-(2-carboxyethyl) isocyanurate crosslinking agent for polyepoxide coatings
Novel curable compositions based on carboxy/epoxy chemistry and cured coatings produced thereby are provided. The curable compositions employ ...
US-5,380,559 Electroless metallization of optical fiber for hermetic packaging
An electroless process has been developed to deposit nickel and gold onto optical fibers using aqueous chemistry. The key to the process is a sensitization of a...
US-D354,347 Blood chemistry sensor assembly
US-5,378,318 Planarization
A method for improved planarization of surface topographies encountered in semiconductor processing that involve the etch-back of exposed surfaces of an oxide of...
US-5,377,673 Intrauterine monitoring device
An improved fetal monitoring device which incorporates sensors which permit the monitoring of inutero fetal heart rate, oxygen saturation, blood chemistry and...
US-5,374,503 Method of forming patterned polyimide films
A method of producing patterned polyimide films using wet development of polyimide precursors through a photoresist mask is disclosed. Low thermal coefficient of...
US-5,372,673 Method for processing a layer of material while using insitu monitoring and control
A method for planarizing a layer (18) begins by forming a layer (18) over a wafer having a substrate (12). Layer (18) has a surface topography which is not...
US-5,370,871 Therapeutic suppression of specific immune responses by administration of oligomeric forms of antigen of...
The present invention relates to a vaccine derived from a bacterial or virus product that initially comprises a mixture of polymers of varying molecular weights....
US-5,370,114 Non-invasive blood chemistry measurement by stimulated infrared relaxation emission
An apparatus for measuring the concentration of a selected solute in a solution. This apparatus is particularly suitable for measuring the concentration of blood...
US-5,368,687 Semiconductor processing method of etching insulating inorganic metal oxide materials and method of cleaning...
In one aspect of the invention, a semiconductor processing method includes the following steps: a) providing a layer of an insulating inorganic metal oxide...
US-5,365,775 Process for automatic measurement of specific filtration resistance and electrostatic charge of a fibrous...
A method is provided to monitor specific filtration resistance, total drainage resistance and drainage flow rate in a continuous on-line manner in the paper...
US-5,364,510 Scheme for bath chemistry measurement and control for improved semiconductor wet processing
A feedback control system for providing automated and in-situ control of multi-component chemical concentrations in a liquid bath used for semiconductor...
US-5,358,875 Method and composition for halohydrocarbon detection
A sensing chemistry for halogenated hydrocarbons includes pyridine or a pyridine derivative and a strong organic alkoxide base. The sensing chemistry may be in a...
US-5,357,306 Photographic processing apparatus
In photographic processing, the chemistry needs to be replenished periodically in order to produce optimum results. Known replenishment systems utilize...
US-5,356,756 Application of microsubstrates for materials processing
Arrays of microfabricated hotplates have been used as substrate arrays for materials processing on a microscopic scale. Properties of individual elements...
US-5,352,411 Device for determination of tear constituents
A device for determination of a tear constituent, including an absorbent tear strip wick and an electrochemical strip connected to one end of the wick. The...
US-5,352,330 Process for producing nanometer-size structures on surfaces using electron beam induced chemistry through...
The process of using electron beam induced stimulated desorption chemistry to produce structures of nanometer order size on surfaces. By passivating a...
US-5,350,781 Process for the production of polyurethane foams
A process for the production of polyurethane foams by reacting a reaction mixture consisting essentially of a) a polyisocyanate component, with b) a polyol component...
US-5,348,684 Organosilylalkyl or organosilylalkenyl compounds, process for preparing them and their use in...
The novel silylalkyl or silylalkenyl compounds correspond to the general formula (I) ##STR1## Here the symbols A.sup.1, A.sup.2, A.sup.3 denote aromatic or ...
US-5,342,943 Preparation of 1H pyrazolo [3,2-c]-S-triazole compounds
Process for the formation of 1-H-pyrazolo[3,2-C]-1,2-4-triazoles useful in photographic chemistry as magenta couplers. The products have chlorine or bromine...
US-5,340,895 Formed, polymeric transition-metal complex catalysts with organosiloxane diphenylphosphine ligands
Formed spherical polymeric complexes of metals of the 8th subgroup of the periodic system with ligands of an organosiloxane copolycondensate optionally...
US-5,334,506 Chromogenic method of detecting endoproteases
Compounds of the formula I ##STR1## in which X denotes a hydrogen atom, a group which irreversibly masks the terminal amino group, or a protecting group...
US-5,332,749 Quinolones, process for their preparation and pharmaceutical compositions containing same
The invention concerns organic chemistry and, more precisely, therapeutic chemistry. It describes specifically novel 6-fluoro 7-piperdinyl quinolone-3 carboxylic...
US-5,330,715 Multilayer test device having fusion bonding attachment layer
A unitized multilayer dry reagent analytical chemistry test structure and device and method of fabricating such device is described. The device includes two or...
US-5,330,634 Calibration solutions useful for analyses of biological fluids and methods employing same
Novel calibration solutions are provided which are useful, for example, with sensor assemblies used for analysis of CO.sub.2, especially in combination infusion...
US-5,321,261 Normalization technique for photon-counting luminometer
A normalization system for multi-photodetector single photon counting luminescent measuring systems and a standard for use in the same. The method comprises...
US-5,319,140 Intermediates for cephalosporins with sulfur containing oxyimino side chain
Antibacterial compounds of the formula ##STR1## wherein R is a mononuclear carbocyclic aromatic group, a 5-membered aromatic heterocyclic group which...
US-5,318,806 Tube having regions of different surface chemistry and method therefor
In a method to modify the chemistry of a portion of the surface of an article, the surface is placed adjacent an electrode in a plasma chamber, the distance to...
US-5,318,185 Surface chemistry control for selective fossil resin flotation
A froth flotation method is disclosed for separating fine particles of fossil resin from by use of frothing reagents which include an aliphatic organic compound...
US-5,302,993 Microwave-heated film processing apparatus
A compact developing apparatus that can quickly modify processing chemistries is disclosed. A web coated with a photograph emulsion or other photosensitive...
US-5,294,744 Formylation process for aromatic aldehydes
A novel two-step reaction process for preparing 5-substituted-2-methoxybenzaldehyde compounds is disclosed wherein the substituent group is either isopropyl or...
US-5,294,586 Hydrogen-water vapor pretreatment of Fe-Cr-Al alloys
A method is provided for forming a precursor layer of aluminum oxide on a cold-rolled ferritic stainless steel substrate having an aluminum content of less than...
US-5,294,311 Salt bridge for analytical chemistry system
A salt bridge for a flow cell which includes a porous bridge element between fluid flow in the flow cell and in an internal reference fluid flow. The bridge...
US-5,286,478 Dentifrice-compatible silica particulates
Novel silica particulates especially adapted for formulation to dentifrice compositions exhibit unique physical and chemical properties. In one embodiment,...
US-5,284,770 Meter verification method and apparatus
A method and apparatus for verifying the operating accuracy of an instrument (10) for detecting the concentration of a medically significant component of a body...
US-5,284,328 Consumable charge box and assembly for recharging material into a furnace or vessel for producing molten metal
Containers formed of consumable materials of compatible chemistry with the remelting of molten metal are disclosed, the individual containers being capable of...
US-5,283,199 Chlorine dioxide monitor based on ion mobility spectrometry with selective dopant chemistry
An improved ion mobility spectrometer (IMS) and method for operating the same which enables analysis of chlorine dioxide in a mixture of gases which also...
US-5,279,294 Medical diagnostic system
Hand-held shirt-pocket portable instrument for quantitative measurement of glucose or analysis in biological fluids. The system accepts a disposable diagnostic...
US-5,277,870 Blood glucose reflectance meter including a null prompting means and a device for providing a constant...
A portable blood chemistry monitoring meter that employs an analog circuit in conjunction with a manually adjustable potentiometer to locate a null position that...
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