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Searching: chemistry





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Patent # Description
US-4,650,867 Process for the preparation of 2,4,6-tris(aminophenylamino)triazines
A process for the preparation of 2,4,6-tris(aminophenylamino)triazines by condensing s-trichlorotriazine with 3 equivalents of a partially protected ...
US-4,645,861 3-sulfonylamino-4-amino phenyl acyl derivatives
A 4-acyl-o-phenylenediamine is selectively sulfonated on the amino group meta to the acyl group to provide an important intermediate for benzimidazole...
US-D288,478 Clinical chemistry analyzer
US-4,643,976 Liquid clinical control, standard, and reagent products
This invention relates to the field of clinical controls useful for calibrating clinical chemistry analyzers and in manual testing methods, as well as clinical...
US-4,642,047 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-4,640,919 3-substituted carbacepem compounds having antibacterial effect
Carbacephem compounds represented by the formula: ##STR1## [wherein R.sub.1 is a lower alkylsulfonyloxy, unsubstituted or substituted arylsulfonyloxy,...
US-4,637,403 Glucose medical monitoring system
Hand-held shirt-pocket portable medical diagnostic system for checking measurement of blood glucose, urea nitrogen, hemoglobin, blood components or other body...
US-4,627,445 Glucose medical monitoring system
Hand-held shirt-pocket portable medical diagnostic system for checking measurement of blood glucose, urea nitrogen, hemoglobin, blood components or other body...
US-4,622,007 Variable heat generating method and apparatus
Method and apparatus for high temperature heating, melting, refining and superheating of materials, such as steel scrap, metals, ceramics or glass. The invention...
US-4,621,072 Process for preparing abrasion-resistant coated catalysts
A process is disclosed for preparing coated catalysts, inter alia, for gas phase oxidations in organic chemistry, comprised of an inert support and a coating of...
US-4,619,749 System for extracting silver from liquid solutions
Ionic silver is extracted from photographic fixing solutions by electrolytic plating on a removably fixed cathode plate of an electrode assembly connected in...
US-4,616,779 Process and device for injecting a finely divided material into a hot gaseous flow and apparatus for carrying...
The invention relates to a process and device for injecting at least one stream of a finely divided material into a hot gaseous flow, such as a plasma jet....
US-4,615,866 Fluid-sampling system and method
Fluid-sampling system and method for automated, chemistry-analyzing apparatus for withdrawing precise quantities of serum samples from a specimen container and...
US-4,615,511 Continuous steelmaking and casting
In a continuous steelmaking method, a molten metal bath is maintained within a rotary furnace heated by oxy-fuel burners at the charge and discharge ends....
US-4,609,541 Method of processing coal gas
An improved method for the recovery of elemental sulfur(S) from a coal-gas containing hydrogen sulfide (H.sub.2 S) wherein hot lime (CaO) is used and then...
US-4,609,400 Method and apparatus for preheating charge materials for continuous steelmaking
A method and apparatus for the continuous preheating of charge materials for an electric steelmaking furnace operation including provision for preheating with...
US-4,607,028 Novel carboxylic acid esters
Novel 17.beta.-methoxycarbonyl derivatives of the androstane series of the formula ##STR1## in which R represents alkyl having from 1 to 4 carbon atoms are ...
US-4,606,227 Apparatus and method for simulating diagenesis
An apparatus and method for simulating diagenetic models, comprising passing a fluid from a fluid supply vessel sequentially through two rock sample containment...
US-4,604,460 1-oxadethiacepham compounds
Intermediates for preparaing an antibacterial 1-dethia-1-oxacephalosporins which are represented by the following formula: ##STR1## wherein R is a...
US-4,603,120 Cyclic octapeptides and pharmaceutical preparations thereof, as well as processes for their manufacture, and...
Cyclic octapeptides of the formula ##STR1## in which Aaa represents a radical of a straight-chained .alpha.,.omega.-diaminoalkanoic acid having from 4 to 7...
US-4,602,483 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-4,600,427 Method of ladle steelmaking and product produced thereby
A method of refining steel in the ladle using a low melting point slag is disclosed. Both ELS and resulfurized steels are subjected to the simultaneous effect of...
US-4,598,049 General purpose gene synthesizer
A microprocessor controlled, general purpose gene synthesizer for programmably synthesizing selected nucleotide sequences. Depending upon a programmed chemistry,...
US-4,593,093 Acyl derivatives
There are presented compounds of the formula ##STR1## wherein R.sup.1 is one of the 3-substituents usable in cephalosporin chemistry, R.sup.2 is hydrogen,...
US-4,593,018 Oligopeptide aldehydes useful as specific inhibitors of enterokinase
Compounds of the general formula: ##STR1## wherein n is an integer from 2 to 6, m is an integer from 2 to 4, p is an integer from 1 to 3, R is H, an amino...
US-4,588,810 Basic triphendioxazine dyestuffs
Basic triphendioxazine dyestuffs of the formula ##STR1## wherein R.sub.1 and R.sub.2, independently of each other, each denote hydrogen, halogen, alkyl,...
US-4,585,646 Obtaining silicon compounds by radiation chemistry
Irradiation of a siloxane derives SiO at low temperatures and forms the basis for a closed cycle reforming the siloxane that decomposes water to produce H.sub.2...
US-4,584,022 Cement plant dust recovery system
A process of treating the dust catch from a cement manufacturing operation to produce either cement clinker or an intermediate product suitable for feed to a...
US-4,581,123 Custom blended precursor for carbon artifact manufacture
This invention is based upon a new concept in carbon artifact manufacture, wherein a precursor can be manufactured by blending extracted components of at least...
US-4,573,968 Infusion and blood chemistry monitoring system
A patient infusion and blood chemistry monitoring system is provided for controlled fluid infusion with intermittent interruption for automated drawing of a...
US-4,568,742 Basic triphendioxazine dyestuffs
Basic triphendioxazine dyestuffs of the formula ##STR1## wherein Q denotes the radical ##STR2## or hydrogen, R.sub.1 and R.sub.2, independently of...
US-4,564,388 Method for continuous steelmaking
A method for the continuous operation of an electric steelmaking furnace, including preheating charge materials, charging and tapping while maintaining full...
US-4,563,537 Synthesis of thiophene-containing prostaglandin endoperoxide apparatus
New organopalladium reactions involving the addition of thienylpalladium compounds to strained bicyclic alkenes, and subsequent chain extension reactions...
US-4,551,428 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: ...
US-4,551,175 Method for controlling slag chemistry in a refining vessel
Method for slag chemistry control in a refractory lined vessel during the process of refining metal by the injection of oxygen gas during a period of oxidation...
US-4,543,124 Apparatus for continuous steelmaking
Apparatus for the continuous making of steel in an electric steelmaking furnace, having a charge material preheater, continuous charging means, and means for...
US-4,539,409 Process for preparing aromatic nitriles
A process is disclosed for preparing coated catalysts, inter alia, for gas phase oxidations in organic chemistry, comprised of an inert support and a coating of...
US-4,535,786 Measurement of body fluid chemistry
A method and apparatus are disclosed in which body fluid chemistry is measured in either differential or nondifferential mode using apparatus of the kind...
US-D280,131 Case for a multiplicity of liquid sample containers for a multitest chemistry analyzer
US-4,533,730 1-Oxadethiacepham compounds
Intermediates for preparing an antibacterial 1-dethia-1-oxacephalosporins which are represented by the following formula: ##STR1## wherein R is a monovalent...
US-4,533,389 Boron containing rapid solidification alloy and method of making the same
A homogeneous boron containing alloy is disclosed with a composition which can be essentially represented by the formula of: M.sub.i T.sub.j B.sub.k where M is a...
US-4,527,240 Balascopy method for detecting and rapidly evaluating multiple imbalances within multi-parametric systems
In a system in which multiple related parameters, such blood chemistry data, are to be evaluated, such evaluation is facilitated by converting the data into...
US-4,523,950 Boron containing rapid solidification alloy and method of making the same
A homogeneous boron containing alloy is disclosed with a composition which can be essentially represented by the formula of: M.sub.i T.sub.j B.sub.k where M is a...
US-4,523,484 Dilution pipetter
A dilution pipetter comprising a diluent sucking probe, a sample probe for sucking and discharging a liquid sample, a diluent discharging probe disposed adjacent...
US-4,521,618 Process for preparing acrylic or methacrylic acid
A process is disclosed for preparing coated catalysts, inter alia, for gas phase oxidations in organic chemistry, comprised of an inert support and a coating of...
US-4,521,275 Plasma etch chemistry for anisotropic etching of silicon
A plasma etch chemistry which allows a near perfectly vertical etch of silicon is disclosed. A Cl-containing compound such as BCl.sub.3 has Br.sub.2 added to it,...
US-4,520,207 Synthesis of thiophene-containing prostaglandin endoperoxide analogs
New organopalladium reactions involving the addition of thienylpalladium compounds to strained bicyclic alkenes, and subsequent chain extension reactions...
US-4,520,185 Alkanolamine linked epoxy-urethanes
Novel epoxy-urethane resins are produced by the reaction of an epoxy-alkanolamine adduct and a urethane prepolymer. The epoxy-alkanolamine adduct is prepared by...
US-4,519,541 Torch flame spray system
A flame spray system comprising a torch is provided having a gas mixing chamber and means for feeding acetylene and oxygen to the mixing chamber in a preselected...
US-4,515,792 Tetracyclic heterocycles and antidepressant compositions thereof
Tetracyclic heterocycles of the formula ##STR1## wherein Th is the residue completing a fused thiophen ring, X represents oxo, hydroxyl together with...
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