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Searching: chemistry





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Patent # Description
US-4,980,018 Plasma etching process for refractory metal vias
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-4,978,649 Porous carbonaceous material
The present invention relates to physical chemistry. The material is made as a three-dimensional matrix with a pore volume of from 0.2 to 1.7 cm.sup.3 /g. The matrix...
US-RE33,464 Method and apparatus for flame generation and utilization of the combustion products for heating, melting and...
Method and apparatus for high temperature heating, melting, refining and superheating of materials, such a steel scrap, metals, ceramics or glass. The invention...
US-4,968,797 Chromogenic 4,4-diaryldihydroquinazolones
4,4-diaryldihydroquinazolones of the formula ##STR1## wherein X.sup.1, X.sup.2 and X.sup.3, independently of one another, denote hydrogen, halogen, alkyl,...
US-4,967,763 Platelet stable blood collection assembly
A blood collection assembly includes a plasma-treated blood collection container and a blood collector which optionally may also be plasma-treated. The collector...
US-4,961,915 Automatic chemistry machine
An automatic chemistry machine particularly suitable for the automatic sequencing of DNA on the microliter scale including a source of reagents, a common means...
US-4,961,778 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-4,960,488 Reactor chamber self-cleaning process
A process for cleaning a reactor chamber both locally adjacent the RF electrodes and also throughout the chamber and the exhaust system to the including...
US-4,959,324 Sample pad assay initiation device and method of making
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-4,958,767 Process and device for injecting a matter in fluid form into a hot gaseous flow and apparatus carrying out this...
This invention relates to a process and device for injecting at least one stream of a fluid matter into a hot gaseous flow, such as a plasma jet. According to...
US-4,956,409 Binder chemistry
A glass wool binder is made to include a surfactant decomposable upon heating so as to produce a hydrophobic surface on the wool after curing of the binder.
US-4,954,648 Method for the bromination of aromatic compound
A method for the bromination of aromatic compounds, including substituted deactivated aromatic compounds, at mild temperature conditions is disclosed. The method...
US-4,954,451 Agent for diminishing ascorbate interference in reagent systems and method relating thereto
The present invention is directed to an agent and method for eliminating ascorbate interference in reagent systems, particularly assay systems using...
US-4,952,300 Multiparameter analytical electrode structure and method of measurement
An ion sensitive electrode device and method of its use in analytical and clinical chemistry are provided for measuring the concentration of an ionizable analyte...
US-4,946,665 Reactive zirconium oxide and its preparation
The invention relates to the chemistry of zirconium. It relates particularly to a reactive zirconium oxide in the form of fine particles whose median diameter does...
US-4,944,923 Autoclave for the pressure digestion of sample materials in analytical chemistry
An autoclave useful for pressure digestion of samples for chemical analysis, consisting of a closeable vessel containing the sample, which during operation...
US-4,943,164 Mixing apparatus for mixing reagent for use in automatic chemistry analyzer
A reagent vessel is mounted for swinging movement and has a projection at the bottom portion thereof. A rotor has an eccentric groove at an upper end and has an...
US-4,942,017 Random access chemistry analyzer
The ability to provide a random assortment of chemical analyses is provided by an improved photometric analyzer system. The analyzer has a rotary sample holding...
US-4,940,945 Interface circuit for use in a portable blood chemistry measuring apparatus
An interface circuit for use in a portable apparatus for measuring the electrochemical characteristics of a sample is disclosed. A disposable cartridge,...
US-D309,015 Fluid cartridge for holding reagents in an automated clinical chemistry analyzer
US-4,937,364 Novel disilacyclohexane compound and process for preparing the same
A disilacyclohexane compound represented by the following general formula (I): ##STR1## wherein R's may be the same or different and each represent an alkyl...
US-4,937,308 Preparation of alkyl O,O-dialkyl-.gamma.-phosphonotiglates
Alkyl .gamma.-halotiglates of the general formula I ##STR1## where X is Cl or Br and R.sup.2 is alkyl of 1 to 3 carbon atoms, having a high E isomer...
US-4,937,188 Enzyme activity amplification method for increasing assay sensitivity
Enzyme amplification is achieved by covalently bonding enzyme to a supporting material via a molecular chain which is a substrate for the enzyme, then...
US-4,936,465 Method and apparatus for fast, reliable, and environmentally safe dispensing of fluids, gases and individual...
A method and apparatus for controlling flows of fluids, suspensions, gases, aerosols, and for sorting individual particles, flowing in transporter ducts of a...
US-4,929,426 Portable blood chemistry measuring apparatus
A portable apparatus for measuring the electrochemical characteristics of a sample is disclosed. A disposable cartridge, including a plurality of interconnected...
US-4,927,809 Oligopeptidyl nitrile derivatives, agents containing them and their use
Compounds of the formula I in which R.sup.1 is the cyanide group, R is Pro or D--Phe--Pro, A is a hydrogen atom or a protective group customary in peptide chemistry, ...
US-4,923,641 Highly concentrated stable solutions of color-forming agent: for pressure-sensitive recording materials
Highly concentrated stable solutions of color-forming agents of the general formula ##STR1## wherein x denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy,...
US-4,923,562 Processing of etching refractory metals
A processing apparatus and method for anisotropically etching thin film metal (e.g. tungsten) under plasma bombardment conditions by using a feed gas mixture...
US-4,920,208 Basic azo dyestuffs
Basic azo dyestuffs of the general formula ##STR1## and tautomers thereof, in which D is the radical of a diazo or tetrazocomponent free of anionic...
US-4,915,777 Method for etching tungsten
A process wherein a thin film of tungsten is anisotropically etched under plasma bombardment conditions by using a feed gas mixture which includes an etchant and...
US-4,909,065 Contained radiological analytical chemistry module
A system which provides analytical determination of a plurality of water chemistry parameters with respect to water samples subject to radiological ...
US-4,903,947 Fence or other structure vegetation barrier
A length of integral fence or other building structure associated vegetation barrier, for use for eliminating the growth of grass or weeds, the barrier includes...
US-4,902,349 Asphalt/polyol emulsion and process for preparation thereof
An asphalt/polyol emulsion is prepared from asphalt and polyol which are mixed and emulsified with a surface active agent and the plasticizer, by utilizing the...
US-4,892,383 Reservoir fiber optic chemical sensors
A reservoir fiber optic chemical sensor (FOCS) is formed of a modular cell body. A fiber optic is attached using a quick connect standard fiber optic connector....
US-4,891,104 Enzymatic electrode and electrode module and method of use
An improved enzymatic electrode and electrode module specifically adapted for use in a medical analyzer device is disclosed which permits rapid analysis of...
US-4,889,992 Automatic infrared microorganism detection instrument
This invention relates to an instrument for the detection of microorganisms in a culture media by means of the measurement of the gaseous products generated...
US-4,886,681 Metal-polymer adhesion by low energy bombardment
A technique is described for improving metal-organic substrate adhesion and for reducing stress between the metal film and the substrate. Low energy reactive...
US-D305,003 Chemistry analyzer tray
US-D305,002 Chemistry analyzer tray
US-D305,001 Chemistry analyzer tray
US-4,875,410 Decorating bowling balls
A bowling ball, rather than being engraved with a decoration, is printed with the decoration, relying on graft polymerization chemistry by which the printing...
US-4,874,946 Method and apparatus for analyzing the internal chemistry and compositional variations of materials and devices
A method and apparatus is disclosed for obtaining and mapping chemical compositional data for solid devices. It includes a SIMS mass analyzer or similar system...
US-4,869,989 Dry toners containing fanal pigments based on cationic dyes
A dry toner for developing latent electrostatic images in electrostatic recording and printing methods contains, as charge-control substance, a pigment of the...
US-4,854,553 Self shielding lance
Apparatus for introducing stirring and refining agents into molten metal in a vessel using a lance having an elongated refractory body with a bore extending...
US-4,854,263 Inlet manifold and methods for increasing gas dissociation and for PECVD of dielectric films
An inlet gas manifold for a vacuum deposition chamber incorporates inlet apertures which increase in diameter or cross-section transverse to the direction of gas...
US-4,853,719 Coated ion projection printing head
A fluid flow assisted ion projection printing head having an electrically conductive metal body defining an elongated ion generation chamber, a corona wire...
US-4,849,258 Mechanical barrel plating-process and article
Major improvements in Mechanical Barrel Plating are virtual elimination of expensive glass impact media, elimination of larger size glass balls such as 3 mm and...
US-4,849,067 Method for etching tungsten
A fluorine based metal etch chemistry, wherein an admixture of etch products (or species which are closely related to etch products) is added during the post...
US-4,847,177 Fanal pigments of closed-ring dry toners containing indamine-and diphenylmethane dyestuffs
A dry toner for developing latent electrostatic images in electrostatic copying and printing processes contains, as charge-control substance, a pigment of the...
US-4,842,687 Method for etching tungsten
A thin film metal (e.g. tungsten) is anisotropically etched under plasma bombardment conditions by using a feed gas mixture which includes a fluorine source,...
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