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Searching: chemistry





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Patent # Description
US-4,121,237 Method and apparatus for processing photographic film
A photographic film developing process and apparatus incorporating a processing chamber in which a resilient membrane forms one wall of the chamber. A...
US-4,119,403 Method and apparatus for temperature controlled samplers
The invention pertains to "wet chemistry" analytical devices for pollutant gases in air. Numerous improvements are provided including a thermo-electric...
US-4,116,635 General purpose in vitro anticoagulant
A process for testing a blood sample as for coagulation, hematology, chemistries, enzymes, electrolytes and trace metals which involves the addition of a...
US-4,113,527 Chrome steel casting
A low carbon Martensite transformation induced substructure, with nickel and molybdenum providing solid solution strengthening is obtained in a low ...
US-4,106,861 Reduced haze photochromic systems
The present invention is directed toward light-transmitting photochromic articles with low haze levels under illumination and processes for forming said articles...
US-4,103,771 Detecting resin cure
Commencement of resin cure may be visually observed by including a dye with the resin reactants; the dye imparts one color to the unreacted components and...
US-4,103,358 Fluid mixing and dispensing system
A fluid mixing system and method is disclosed for automatically mixing precise concentrations of photographic processing chemistry to be used in an X-ray film...
US-4,099,000 Process for preparing di-7-azido cephalosporin compounds
A novel total synthesis process is provided, yielding cephalosporin or penicillin compounds. The process uses as starting material a glycine ester, which first...
US-4,098,791 Process for preparing 3-(cyanimino)-3-amino-propionitriles
An improved multistep process for the production of intermediates for hypotensive compounds, which intermediates are of the formula V: ##STR1## wherein...
US-4,080,345 Catalyst mixture for use in trimerizing and/or polymerizing isocyanates and/or for the polyaddition of active...
Catalyst mixture for use in trimerizing and/or polymerizing isocyanates and/or for the polyaddition of active hydrogen atom containing polyethers and...
US-4,079,179 6-Loweralkoxy or loweralkylthio-3-cephem-4-carboxylic acids
Cephalosporin compounds having a loweralkoxy or loweralkylthio substituent in the 6-position are prepared by a multi-step total synthesis route using as starting...
US-4,075,072 Laser chemistry synthesis of NF.sub.4 BF.sub.4
A process for producing the product NF.sub.4 BF.sub.4 by subjecting gases .sub.3, BF.sub.3, and a gaseous source of a compound which releases fluorine gas when...
US-4,073,712 Electrostatic water treatment
A reliable and efficient device for the treatment of liquid system, to inhibit scale formation, subjects the liquid to an electrostatic field and includes a pair...
US-4,070,261 Production of B.sub.2 H.sub.6 from BCl.sub.3 + H.sub.2 at room temperature by laser induced chemistry
A CO.sub.2 laser is used to irradiate a laser cell containing gaseous BCl.sub.3 + H.sub.2 at room temperature (25.degree. C) to produce B.sub.2 H.sub.6. The...
US-4,052,161 Kinetic analyzer
A completely automated kinetic analyzer particularly suited for performing classical kinetic chemistries on an ultra-micro scale. The analyzer comprises a sample...
US-4,049,879 Intercalated transition metal phosphorus trisulfides
A new composition of matter corresponds to the formula A.sub.x M(PS.sub.3).sub.y wherein A is at least one Group Ia metal, x is a numerical value greater than...
US-4,049,472 Atmosphere compositions and methods of using same for surface treating ferrous metals
Atmosphere compositions and processes utilizing the compositions for heat treating ferrous metal articles under a controlled furnace atmosphere to either...
US-4,043,977 Non-stick polyorganosiloxane coating compositions
A composition for coating paper, films and fiber materials, comprising A. 4 parts by weight of a linear polyorganosiloxane with ends stopped by vinyl groups and...
US-4,043,933 Method of fabricating a fuel cell electrode
A method of fabricating a fuel cell electrode comprising an electrocatalyst and binder wherein the colloidal chemistry of the aqueous catalyst and the binder...
US-4,043,810 Cast thermally stable high temperature nickel-base alloys and casting made therefrom
A cast thermally stable high temperature nickel-base alloy characterized by superior oxidation resistance, sustainable hot strength and retention of ductility on...
US-4,043,559 Educational game
An educational game arrangement in which a systematic set of games may be played on a plurality of interrelated templates or game boards. The games played on the...
US-4,041,028 Chlorination of 2,3-dimethyl-1,2,4-benzothia-diazine 1,1-dioxide
Novel 2,3-disubstituted-1,2,4-benzothiadiazine 1,1-dioxides of the formula: ##STR1## wherein X is hydrogen or chlorine. The novel compositions have been ...
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...
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