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Searching: chemistry





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Patent # Description
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,...
US-4,839,104 Process for preparing sertraline intermediates
A novel three-step process for preparing 4-(3,4-dichlorophenyl)-4-phenylbutanoic acid is disclosed, which involves (1) reducing...
US-4,838,990 Method for plasma etching tungsten
A process wherein a thin film metal (e.g. tungsten) is anisotropically etched under plasma bombardment conditions by using a feed gas mixture which includes a...
US-4,838,098 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-4,837,161 Method for reagent addition to a flowing liquid carrier stream
An analytical chemistry apparatus and method for introducing a reagent into a flowing stream of liquid carrier in order to quantitatively analyze one or more...
US-4,836,886 Binary chlorofluorocarbon chemistry for plasma etching
A plasma comprised of trifluorochloromethane and an oxidant etches non-insulating materials such as tungsten at very high etch rates when the oxidant comprises...
US-4,835,268 Luminescent cyclic hydrazides for analytical assays
Disclosed herein are derivatives of 5-(lower alkyl)-7-amino-2,3-dihydro-1,4-phthalazinedione having substituents on the amino group. The derivatives have...
US-4,833,622 Intelligent chemistry management system
A system (10) particularly suited for employment for purposes of effectuating the monitoring, diagnosing and controlling of the chemistry of the water and steam...
US-4,830,217 Body fluid sample collection tube assembly
An assembly is provided for receiving, maintaining and storing blood samples taken from individuals some of whom may have a disease which can contaminate anyone...
US-4,827,944 Body fluid sample collection tube composite
A composite body fluid sample container is provided which incorporates at least one dry chemistry test strip into the structure with a shrink-wrap film whereby a...
US-4,824,738 Controlling oxygen concentrations in fuel cell cooling water loops
In order to achieve good stack water chemistry and minimize corrosion in a fuel cell stack water cooling loop, the oxygen concentration in the water must remain...
US-4,820,792 Preparation of aromatic polyketones using a strong acid catalyst with a weaker acid solvent
Polyaryletherketones are synthesized by Friedel-Crafts chemistry using a catalytic quantity of a strong acid (e.g. trifluoromethanesulphonic acid) in a solvent...
US-4,820,552 Coated zinc, chemistry and manufacturing process
A process for making coated zinc metal flakes, wherein finely divided zinc metal powder is dispersed and coated, using a high speed disperser, or the like, in...
US-4,820,545 Method of bonding ceramic orthodontic appliances
A method of enhancing the bondability of ceramic orthodontic brackets or other dental attachments for improving the bonding strength between such attachments and...
US-4,819,711 Compactability and permeability control for fabricating ECP mold
A method of controlling, during the act of mold fabrication in real time, the compactability and permeability of a sand mold containing an evaporative foam...
US-4,812,569 Chromogenic phthalides
Chromogenic phthalides of the general formula ##STR1## wherein R.sub.1 and R.sub.2 independently of one another denote hydrogen, alkyl, alkenyl, aralkyl,...
US-4,806,654 Processes for the preparation of benzo(chalcogeno)(4,3,2-cd)indazoles and intermediates thereof
Improved processes for producing substituted benzo(chalcogeno)[4,3,2-cd] indazoles. The processes produce compounds in higher yields and of greater purity by...
US-4,804,475 Metallized membrane systems
Polymer membranes metallized by wet chemistry are highly suitable, for example, for the separation of inert, reactive and fermentation gases. The metallization is...
US-4,801,886 Mounting means for water chemistry analysis device
An improved method of attachment of a pH or p sensor in the recirculation/filtration line for a pool or spa or for forming a T-connection between any two pipes...
US-4,800,220 Crosslinked carboxylic copolymers usable as thickeners in aqueous media and preparation thereof
The invention relates to the chemistry of polymers and to cross-linked carboxylic copolymers obtained by copolymerization of an unsaturated carboxylic monomer, a...
US-4,798,655 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-4,795,880 Low pressure chemical vapor deposition furnace plasma clean apparatus
Cleaning of low pressure chemical vapor deposition (LPCVD) furnaces is accomplished "in-situ" at furnace operating temperatures. Radio frequency (RF) power is...
US-4,794,070 Automatically processible photographic element comprising a non-silver halide layer containing bromide
Automatic processing equipment for photographic film, particularly radiographic black-and-white film, are required to handle different brands and constructions...
US-4,790,979 Test strip and fixture
A test strip is disclosed which provides for transport and separation of heterogenous fluid samples. This test strip can be used for analysis of whole blood by...
US-4,789,426 Process for performing variable selectivity polysilicon etch
A method for controllably varying the selectivity of reactive etching process for etching a polysilicon film, involves the addition of an adjustable amount of...
US-4,787,398 Glucose medical monitoring system
Hand-held shirt-pocket portable glucose medical monitoring system for checking measurement of blood glucose or other body qualities. The system includes a...
US-4,786,729 Benzimidazolo-quinazolines
Benzimidazolo-quinazolines of the general formula ##STR1## in which Y denotes a radical of the formula ##STR2## Y.sub.1 denotes hydrogen or alkyl, X...
US-4,786,394 Apparatus for chemical measurement of blood characteristics
A clinical chemistry analyzer system for blood chemistry analysis is disclosed. Two major parts comprise the system. One part is a discardable sensor cartridge...
US-4,785,642 Decorative clip with perfume dispenser
A decorative clip for use as a jewelry item is disclosed which shines and glitters in the dark and emits perfume. This shining and glittering effect is achieved...
US-4,783,196 Highly concentrated stable solutions of color-forming agents: 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-4,781,358 Apparatus for monitoring an article in sintering furnace
An apparatus for measuring and regulating the variable pressure furnace gas chemistry is described. The apparatus uses a mass spectrometer for measurements, in...
US-4,777,288 Process for preparing a 4,4-diphenylbutanoic acid derivative
A novel three-step process for preparing 4-(3,4-dichlorophenyl)-4-phenylbutanoic acid is disclosed, which involves (1) reducing...
US-4,775,558 Polyurethanes prepared or combined with another material and a process for their manufacture
Polyurethanes which have been prepared or combined with another material are made by combining or applying a polyurethane-forming reaction mixture or...
US-4,775,448 Isolation process
A process of isolating dihydroxyacetone which is a useful intermediate in organic chemistry as well as being a sun-tanning agent. The process comprises passing a...
US-4,774,192 A dry reagent delivery system with membrane having porosity gradient
Dry chemistry reagent system, kit and method for detection of an analyte such as glucose, cholesterol, urea, antigen or antibody. The reagent system is a porous...
US-4,772,791 Neuroreceptor activity assessment
The effectiveness of drugs and substances that affect brain chemistry can be efficiently and relatively inexpensively monitored. Radioactive tracer substances...
US-4,766,550 Automatic on-line chemistry monitoring system
A system for automatically sampling, monitoring and analyzing power plant steam cycle water supplied from various points in a power plant steam cycle system as a...
US-4,765,781 Coal slurry system
A slurry of liquified gas such as carbon dioxide and finely pulverized coal particles is provided in a mixing chamber and discharged from the chamber into a...
US-4,762,003 Material test machine for tension-compression tests at high temperature
Apparatus providing a device for testing the properties of material specimens at high temperatures and pressures in controlled water chemistries includes, inter...
US-D297,165 Automated chemistry analyzer for analysis of blood components or other body fluids
US-4,756,785 Process for the preparation of adhesives and their use for the formation of bonds
The preparation and use of polyurethane-based hot melt adhesives which are cross-linked under the influence of heat comprising reacting (a) a polyisocyanate component...
US-4,754,034 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-4,753,896 Sidewall channel stop process
A new way of making sidewall channel stops for silicon on insulator devices (including silicon on oxide, silicon on nitride, and silicon on sapphire devices)....
US-4,752,740 Electronic water chemistry analysis device with linear bargraph readouts
An improved water analysis system for pools, spas, and the like. An oxidation-reduction potential (ORP) sensor is disposed in the recirculation/filtration system...
US-4,749,648 Agent for the determination of esterolytic and/or proteolytic enzymes
Esters and agents including the esters, useful as substrates for esterolytic and/or proteolytic enzymes, said esters being compounds of the general formula: ...
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