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Searching: chemistry





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Patent # Description
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...
US-5,106,467 Alkaline leaching of galvanized steel scrap
Caustic dezincing galvanized steel scrap. A dezincing plant includes a plurality of tanks interconnected in series with steel scrap sequentially being moved...
US-5,104,942 Preparation of side-chain polymers
A method for adding ester side groups, e.g. liquid crystalline groups, to a polymer backbone using tin chemistry. ##STR1## The method is particularly useful...
US-5,104,684 Ion beam induced deposition of metals
Metal is deposited in lines of submicron width by scanning a focused ion beam along a substrate in the presence a vapor of a precursor platinum compound. High...
US-5,104,621 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...
US-5,100,805 Quantitative immunoassay system and method for agglutination assays
An improved, copolymer-based immunoassay system, method, and apparatus is highly sensitive and effective in accurately measuring extremely low concentrations,...
US-5,097,014 Chromogenic tripeptides
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-5,095,206 Method and apparatus for improving the specificity of an ion mobility spectrometer utillizing sulfur dioxide...
An improved ion mobility spectrometer (IMS) and method for operating the same which enables analysis of a specific acid gas analyte in a mixture of such gases...
US-5,094,688 Triarylmethane color-forming agents
Color-forming agents of the present formula ##STR1## wherein X denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy, alkylamino,...
US-5,093,477 Rapidly cleavable substrate for HIV protease
A rapidly cleavable substrate for HIV protease Hepta- to nona-peptides of the formula in which A is absent or represents Val, Ile or Thr, B denotes Ser, Thr or ...
US-5,088,690 Electrode holder for immersion-type, flow-type and attachment-type measuring systems in analytical chemistry
In connection with an electrode holder for immersion-type flow-type and attachment-type measuring systems in analytical chemistry, in particular for pH,...
US-5,087,719 Dehydrogenative polymerization of silanes to polysilanes by catalysts of transition-metal silyl derivatives
A mechanism for the dehydrogenative polymerization of silanes to polysilanes is proposed, based on studies with zirconocene and hafnocene catalysts. This is a...
US-5,086,073 Composition for treating depression with aralkyl 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-5,085,725 Method of chemical bonding of solid propellant grains to the internal insulation of an interceptor motor
The trimer of 1,6-hexanediisocyanate, which has the chemical name in acconce with (International Union of Pure and Applied Chemistry) (IUPAC) nomenclature of ...
US-5,080,455 Ion beam sputter processing
Surface treatment of a substrate by ion beam sputtering (IBS). The sputtered material impacts on the substrate with a kinetic energy which may be several orders...
US-5,079,146 Method of protection of the carboxy groups in the chemistry of .beta.-lactam compounds
The present invention relates to a new method of protection of the carboxy group in the chemistry of the compounds of .beta.-lactam type. According to such a...
US-5,073,963 Computerized method of matching two-dimensional (2-D) patterns
This invention teaches a computerized method for use in data acquisition and manipulation of two-dimensional patterns in the fields of medicine, astronomy,...
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