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Searching: chemistry





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Patent # Description
US-5,206,193 High purity fused grain in the system Al.sub.2 O.sub.3 -Cr.sub.2 O.sub.3 -MGO
High purity fused grain and refractory compositions that contain a high purity fused grain made up of 35 to 85 wt. % chromia, 5 to 55 wt. % alumina, and 5 to 45...
US-5,206,187 Method of processing semiconductor wafers using a contact etch stop
A method of processing a semiconductor wafer comprises: a) fabricating a wafer to define a plurality of conductively doped active regions, the active regions...
US-5,204,269 Sample handling for chemistry analyzers
An automatic chemistry analyzer comprises discrete sample cups about the circumference of a carousel. A motor selectively moves the sample cups towards and away...
US-5,201,229 Sensor for controlling water quality of reactor and method of controlling said water chemistry
An element (e.g., a sensor) has a fine-line thin film of a conductor formed on a non-conductive substrate, and a change of physical properties (e.g., ...
US-5,198,540 Process for the preparation of oligonucleotides in solution
Process for the preparation of oligonucleotides by successive linking of individual or several nucleoside and/or nucleotide units in a homogeneous phase system...
US-5,196,510 Molecular recognition units
A system or method for identifying and/or designing novel peptides and polypeptides comprising an amino acid sequence which mimics the molecular recognition site...
US-5,188,941 Enzymatic determination of theophylline
The present invention provides a new methodology and test composition for determining the presence of theophylline in test samples. The methodology employs...
US-5,187,894 Turfing systems for stadia
Stadia and other activity surfaces are provided comprising natural turf. Natural turf units are provided which are transportable between first and second...
US-5,187,134 Formed, polymeric transition-metal complex catalysts with organosiloxane phenylphosphine ligands
This invention relates to formed, polymeric complexes of metals of the eighth subgroup of the periodic system with ligands of an organosiloxane copolycondensate...
US-5,182,083 Sample wheel for chemistry analyzers
An automatic chemistry analyzer includes sample cups circumferentially located on a sample wheel. Means moves the sample cups rotationally under cycloidal action...
US-5,178,730 Paper making
A process for improving art chemistry in papermaking is accomplished by the addition of a cationic polymer and natural hectorite to the furnish prior to headbox....
US-5,177,043 .alpha.-olefin polymerization catalyst component
This invention relates to a catalytic component for the polymerization of .alpha.-olefins and provides a catalytic component of magnesium support type capable of...
US-D332,314 Clinical chemistry analyzer
US-5,175,266 Nucleosides and oligonucleosides with a phosphate-free internucleoside backbone and process for preparing the same
Nucleoside derivatives which contain a nucleo-base, a sugar and an amino acid backbone of the structure: ##STR1## where R' refers to the various amino acid...
US-5,175,133 Ceramic Microspheres
A calcined microsphere of ultrafine bauxite particles having a mean particle size in the range 0.01 to 0.3 micrometers, said microsphere having a particle size...
US-5,174,963 Blood glucose reflectance meter including a null prompting means and a device for providing a constant...
A portable blood glucose monitoring meter that employs an analog circuit in conjunction with a manually rotatable dial that varies the resistance of a ...
US-5,171,491 Method of producing near net shape fused cast refractories
A method of producing near net shape fusion cast refractories. The method includes the steps of continuously introducing refractory particles into a melting...
US-5,168,552 Color separation in ink jet color graphics printing
In liquid-ink color graphics printing, true black ink is preferred over composite black wherever possible, but poor print quality results from printing black ink...
US-5,167,760 Etchback process for tungsten contact/via filling
An etchback process for etching a refractory metal layer formed on a semiconductor substrate with a greatly reduced micro-loading effect. The etch proceeds in...
US-5,165,406 Electrochemical sensor apparatus and method
A sensor assembly for a combination infusion fluid delivery system and blood chemistry analysis system includes a sensor assembly with each of the assembly...
US-5,164,330 Etchback process for tungsten utilizing a NF3/AR chemistry
A process for etching a tungsten layer formed on a semiconductor substrate is described. The etch is carried out in a parallel plate plasma reactor. The etchant...
US-5,160,348 Mixtures of blue azo disperse dyestuffs
Mixtures of dyestuffs of the formulae I to IV ##STR1## wherein the radicals have the meanings customary in dyestuff chemistry, are excellent substitute...
US-5,158,970 Proline derivatives
New proline derivatives of the general formula: ##STR1## wherein R stands for a lower alkyl group and X for a N-terminal protective group conventional in...
US-5,146,413 Method for the determinate evaluation of a chemistry analyzer's combined diluting and analyzing systems
A method for chemistry systems analysis to identify the performance of the functional components of the system, specifically, those of volumes dispensed and...
US-5,143,540 Densification of ceramic-metal composites
Substantially dense, void-free ceramic-metal composites are prepared from components characterized by chemical incompatibility and non-wetting behavior. The...
US-5,141,776 Method of depositing a refractory inorganic coating on the surface of a workpiece
The method relates to inorganic chemistry. Pursuant to the method, a powder mixture comprising a transition metal, a nonmetal, an inert filler and an activator is...
US-5,141,611 Removing and recovering plant polyphenols
Polyphenolic substances such as food dyes, tannins, fruit juices and wine colorings are removed from a solution by adsorption onto a regeneratable adsorbent...
US-5,139,755 Advanced reburning for reduction of NO.sub.x emissions in combustion systems
Techniques for enhancing the burnout zone chemistry for NO.sub.x reduction are disclosed. The key parameters for the enhancement of burnout zone chemistry are:...
US-5,139,744 Automated laboratory work station having module identification means
An automated multi-purpose analytical chemistry processing center and laboratory work station having a movable table for supporting microtiter plates and other...
US-5,139,641 Method of generating a constant derivation potential and a reference electrode in analytical chemistry
In connection with a method for generating a constant derivation potential in analytical chemistry by means of a pH measuring chain containing a reference...
US-5,139,203 Method and device for recovery of scrap goods
Scrap goods (S), for example, electronic and electrical apparatus, components, cables and the like are intermittently and alternately mechanically crushed (1,3),...
US-5,138,450 High density character and/or figure displaying apparatus
A display apparatus capable of displaying, by use of an ordinary television set function, character/figure information having a higher display density than...
US-5,138,066 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-5,135,737 Amplifier molecules for enhancement of diagnosis and therapy
Disclosed are amplifier molecules: various organic compounds having branched structures terminating with amine groups to which pharmacologically active groups...
US-5,135,716 Direct measurement of HDL cholesterol via dry chemistry strips
A device for determining HDL cholesterol by obtaining plasma from whole blood and determining the HDL cholesterol level from the plasma. The device includes an...
US-5,133,908 Process for the preparation of dispersible colloidal systems of a substance in the form of nanoparticles
The Process according to the invention comprises: (1) the preparation of a liquid phase consisting essentially of a solution of the substance in a solvent or in a...
US-5,132,345 Ion-selective electrodes
An ion-selective polymeric membrane for an electrochemical sensor for use in analytical chemistry, comprising a) a supporting matrix e.g. of PVC, and b) an ionophore...
US-5,132,248 Direct write with microelectronic circuit fabrication
In a process for deposition of material onto a substrate, for example, the deposition of metals or dielectrics onto a semiconductor laser, the material is...
US-5,132,230 Primary standard and method of making secondary standards for calibration of glycated protein assays
This invention provides a primary standard and/or secondary standards for assay for glycated proteins in samples such as blood. The primary standard is composed...
US-5,132,075 Method and apparatus for water chemistry diagnosis of atomic power plant
Measurement values of conductivity of pH of water in the primary cooling water system of a boiling water atomic power plant are input through on-line and the...
US-5,130,095 Automatic chemistry analyzer
An automatic chemistry analyzer includes a flow cell mounted so that flow through the cell and tubing connected to the cell is visible from the front of the...
US-5,130,010 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-5,128,103 Apparatus for automatically processing magnetic solid phase reagents
An automatic chemistry system having a wheel for mounting reaction vessels is provided with a programmable permanent magnet which is selectively positioned...
US-5,125,748 Optical detection module for use in an automated laboratory work station
An automated multi-purpose analytical chemistry processing center and laboratory work station having a movable table for supporting microtiter plates and other...
US-5,118,383 Method for producing trench structures in silicon substrates for VLSI semiconductor circuits
A method is provided for producing trench structures having vertical, smooth side walls and straight, flat trench floors in silicon substrates. The reactive ion...
US-5,114,926 Tetrapeptide inhibiting the entry into cycle of hemopoietic stem cells processes for its preparation, and its uses
The invention relates to a tetrapeptide corresponding to the general formula and its substitution derivatives by one or several groups, identical or different,...
US-5,114,805 High temperature molten salt electrochemical cell
A high temperature molten salt electrochemical cell including an electrode tack assembly sealed in a containment vessel is provided for use in testing ...
US-5,114,545 Electrolyte chemistry for improved performance in modern industrial alumina reduction cells
A composition and method is disclosed for the production of aluminum. A modified cryolite electrolyte bath is shown comprising, by weight: 0.5 to 1.5% LiF; 0 to...
US-5,112,435 Materials and methods for etching silicides, polycrystalline silicon and polycides
Gas chemistry and a related RIE mode process is described for etching silicides of the refractory metals titanium, tantalum, tungsten and aluminum and for...
US-5,108,703 Automated multi-purpose analytical chemistry processing center and laboratory work station
An automated multi-purpose analytical chemistry processing center and laboratory work station having a movable table for supporting microtiter plates and other...
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