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Searching: chemistry





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Patent # Description
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...
US-5,274,122 Acidic derivatives of homocysteine thiolactone
Homocysteine thiolactone derivatives in which the nitrogen is acylated with groups containing acidic functionalities have been synthesized. These include the...
US-5,273,638 Nucleotide sequence determination employing matched dideoxynucleotide terminator concentrations
A method of positively deciphering a DNA sequence of a sample by comparing data of two electropherograms obtained from separate electrophoresis of products from...
US-5,273,554 Process for fabricating a battery
Batteries based on lead chemistry, e.g., lead-acid batteries, are substantially improved through the use of a particular positive material. This material is...
US-5,271,899 Chemistry analyzer
A generally spherical bead on the floor of a compartment is prevented from lying in the path of insertion of an elongated member into the compartment when the...
US-5,271,815 Method for measuring glucose
This invention provides an electrochemical sensor capable of measuring the glucose level of body fluids, especially blood. More particularly, this invention also...
US-5,268,258 Monomolecular resist and process for beamwriter
A process for the manufacture of submicron circuits uses a submicron beam writer having multiple beams to Inscribe simultaneously a plurality of metal patterns...
US-5,268,147 Reversible direction capsule chemistry sample liquid analysis system and method
Sample liquid analysis apparatus and method for the formation and supply to a conduit of a stream of successive sample liquid test packages, and the repeated...
US-5,268,087 Electroplating test cell
Hull cell has been widely used in the plating industry for many years to evaluate the plating chemistry as a function of current densities. However, because of...
US-5,267,855 Bonding base and method of making the same for a plastic orthodontic bracket
A bonding base and method of making the base for a plastic orthodontic bracket to provide a mechanical lock that inhibits both shear and tensile forces when...
US-5,266,670 Selective monohydrosilation of vinyl and ethynyl functional norbornenes and curable products produced thereby
A process comprising the steps of: 1) reacting a norbornene compound of the formula: ##STR1## where R is H or methyl, R.sup.1 is a direct bond or --C(.dbd.O)O--...
US-5,266,199 Serum separating apparatus
This invention relates to an apparatus used in a centrifugal separating step for sample preparation in the field of clinical chemistry. Especially, the invention...
US-5,262,530 Automated system for polynucleotide synthesis and purification
A method and system for polynucleotide synthesis are provided which employ solid phase synthesis on a nonswellable porous polystyrene support by phosphoramidite...
US-5,260,331 Composition for treating depression with (S- or O-heteroaryl)alkyl amines
The invention concerns compounds having formula: ##STR1## or a salt thereof, wherein E represents hydrogen, lower alkyl or a group Ar.sup.1 --A.sup.1 --; Ar...
US-5,260,221 Sample pad assay initiation device
A self-contained assay device is provided, where an analyte may be detected or be quantitated by measuring the distance of a detectable signal from a ...
US-5,260,218 Autoclave corrosion test for zirconium alloys
An improved short-term autoclave (10) test for ex-reactor evaluation of in-reactor corrosion resistance of zirconium alloy members (16) for use in pressurized...
US-5,260,195 Nonaqueous polymeric reagent compositions and applications thereof
Non-aqueous, polymeric reagent film compositions for use with analytical test devices of the dry chemistry type are described. The film compositions are prepared...
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