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Searching: chemistry





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Patent # Description
US-4,037,643 Nodularizing treatment employing unitized modifying agent
A method and apparatus is disclosed for conditioning a charge of molten cast iron, which would normally solidify with a flake graphite structure, to produce...
US-4,027,979 Multiple chemistry analyzer
The multiple chemical analyzer incorporates an improved multiple diluter, multiple pipettor, multiple colorimeter with probes and a signal storage device into a...
US-4,023,985 Steel abrasives and method for producing same
Disclosed is a method of producing a versatile as-cast steel shot having a substantially fully martensitic structure and corresponding full hardness which...
US-4,008,139 Fluorinated compounds
1,1,4,4-Tetrakis(trifluoromethyl)butan-1,4-diol and 1,1-bis (trifluoromethyl)propanol-1 are prepared by reacting gaseous hexafluoroacetone and ethane in a...
US-3,997,420 Automatic analyzer
An apparatus for automatically performing blood chemistry analyses and in particular the determination of the pH, PCO.sub.2 and PO.sub.2 of blood. The apparatus...
US-3,979,413 Polycyclic dyestuffs
Polycyclic dyestuffs of the formula ##SPC1## Wherein R.sub.1 and R.sub.2 represent alkyl, cycloalkyl, aralkyl or aryl or together form a ring which is optionally...
US-3,976,729 Process for producing carbon fibers from mesophase pitch
An improved process for producing carbon fibers from pitch which has been transformed, in part, to a liquid crystal or so-called "mesophase" state. According to...
US-3,976,640 Bis-type quaternary salts including benzothiazole and benzimidazole rings and process for preparing dye therewith
Novel bis type heterocyclic quaternary salts are provided which are useful in the preparation of various linked cyanine dyes and related compounds. BACKGROUND OF THE...
US-3,976,541 Secondary coolant purification system with demineralizer bypass
Apparatus and method are provided for a nuclear stream supply system for adequately controlling the chemistry of the secondary coolant. The invention includes...
US-3,970,392 Analog to digital to analog storage and retrieval for a plurality of photometric blanking values
To enable the storage and retrieval of a plurality of different aliquot valves of blanking standards or serums for photometric comparison with plural test sample...
US-3,969,202 Process for the recovery of antimony values from ores containing sulfo-antimony compounds of copper, and arsenic
Tetrahedrite ore concentrate, sodium sulfide added as such or formed in situ, calcium values preferably supplied as lime, and a reducing agent, e.g. coke, are...
US-3,963,019 Ocular testing method and apparatus
A method and apparatus for detecting changes in body chemistry, for example, glycemia, is disclosed in which a beam of light is projected into and through the...
US-3,959,399 Mono-alkylation of naphthalene
In the alkylation of naphthalene using an alkene reactant to produce monoalkyl naphthalene, the inhibition of polyalkyl and specially dialkyl naphthalenes by the...
US-RE28,803 Method and electronic control for the analyzation of serum chemistries
An electronic control logic system for processing the results of a spectrophotometer analysis of a serum chemistry comprised of a serum and one or more chemical...
US-3,953,201 Ferritic stainless steel
A ferritic stainless steel consisting essentially of, in weight percent, from 10.5 to 19.0% chromium, up to 0.03% carbon, up to 0.03% nitrogen, up to 0.20%...
US-3,943,364 Determining homogeneity of clinical controls
Homogeneity of bulk control serum is determined when making production fills of clinical chemistry control serum using a radioactive tracer in the bulk control...
US-1,000,0860 Methods of electrochemical deposition for void-free gap fill
A method of electroplating on a workpiece having at least one sub-30 nm feature includes applying a first electrolyte chemistry to the workpiece, the chemistry...
US-1,000,0708 Method for heating crude
A method for heating one or more streams from a refinery process, chosen from the group of a crude tower inlet, vacuum tower inlet, catalytic reformer inlet,...
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