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Searching: chemistry





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Patent # Description
US-4,398,888 Molecular model for chemistry
A molecular model building set for the formation of models of molecules and compounds primarily in the field of organic chemistry is disclosed. The set includes...
US-4,393,506 Sealed-off RF excited CO.sub.2 lasers and method of manufacturing such lasers
A method is disclosed for manufacturing a sealed-off RF excited CO.sub.2 laser with a longer operating life. The invention, which relates to the method and the...
US-4,386,073 Tripeptides acting on the central nervous system and a process for the preparation thereof
The invention relates to new peptide derivatives which act on the central nervous system and correspond to the general formula (I), wherein X is L-pyroglutamyl,...
US-4,383,028 Photographic chemistry
A photographic chemistry comprised of a solution containing a mixture of different chemicals which cooperate to minimize the need for long film exposure times to...
US-4,373,967 Process for making resulfurized machinable steel
A melt is produced composed of iron, manganese and carbon in known ratios for free-cutting carbon steel with sulfur being included at roughly 0.15%. Aluminum and...
US-4,369,179 Acylpeptides
Acylpeptides derived from somatostatin or from a derivative thereof having analogous action, in which the amino acids sequence is modified by omitting individual...
US-4,366,316 1-Oxadethiacepham compounds and process for producing said compounds
Intermediates for preparing an antibacterial 1-dethia-1-oxacephalosporins which are represented by the following formula: ##STR1## wherein R is a monovalent...
US-4,363,661 Method for increasing mechanical properties in ductile iron by alloy additions
A method is disclosed of making as-cast ductile iron wherein an iron melt having a chemistry capable of forming gray iron having flake graphite is treated with a...
US-4,362,716 Dipeptides, their preparation and compositions containing them
Dipeptides of the formula: ##STR1## in which R-CO represents a fatty acid residue and the symbols R.sub.1, which are identical or different, represent...
US-4,358,439 Cyclooctapeptides
Cyclic peptides of the formula ##STR1## in which trp represents L-Trp, D-Trp, or an analogous radical which carries a halogen atom in the indole nucleus,...
US-4,353,160 Solar cell junction processing system
An integrated system and process for the continuous formation of p-n junctions in solar cells in a cost-effective manner and under computer control. The...
US-4,352,896 Polyol mixtures containing reactive blowing agents and use thereof for the production of foamed polyurethanes
This invention relates to mixtures of polyols which are liquid at room temperature with functional aldoximes as blowing agents, wherein the aldoxime groups react...
US-4,351,949 Bicyclic prostaglandin analogs and method of synthesis
New organopalladium reactions involving the addition of pi-allylpalladium compounds to strained bicyclic alkenes, and subsequent chain extension reactions...
US-4,350,627 Biologically active peptides
There is disclosed biologically active peptides of the formula ##STR1## where X is a hydrogen atom, an N-terminus protecting group (any of an acyl-type...
US-4,349,670 Process for the preparation of cationic dyestuffs
To prepare dyestuffs of the general formula ##STR1## in which R.sup.1 and R.sup.2 represent methyl or ethyl, n represents 0 or 1, B represents the divalent...
US-4,343,749 Process for the preparation of monohydroperfluoroalkane-sulfonic acid halides and some specific representatives...
Monohydroperfluoroalkanesulfonic acid halides of the formula I ##STR1## in which R.sub.f =F or perfluoroalkyl, X=Cl or F and n=1-7, are prepared by reacting...
US-4,343,687 Production of chain reactions by laser chemistry
Directed to the use of non-resonant laser energy to initiate reactions in reaction mixtures containing ingredients of the kind and in the amounts capable of...
US-4,342,769 2-[(Methylsulfinyl)acetyl]-3-heterocyclicindoles and derivatives thereof as immunosuppressants
This invention relates to compositions of matter classified in the art of chemistry as substituted 2-[(methylsulfinyl)acetyl]-3-heterocyclicindoles, various...
US-4,341,677 Antioxidants and reinforced polymers and oil-in-water emulsions of antioxidants
Oil-in-water emulsions of antioxidants having low volatility and good thermal resistance are provided for treating fibrous reinforcements such as glass fibers....
US-4,337,135 Barrel plating apparatus
A metal plating process and apparatus is disclosed and includes a plurality of pre-plating stations comprising tanks or reservoirs containing various cleaning...
US-4,329,385 Texturing polymer surfaces by transfer casting
This invention is concerned with fabricating textured surfaces on polymers without altering their surface chemistries. A surface of a fluorocarbon polymer 10 is...
US-4,329,149 Method for spectrophotometric compensation for colorimetric reagent variation
A method for compensating for error in amount of indicator added to a sample under test in bleaching chemistry analysis involves adding a reagent system...
US-4,328,345 Pyridyl substituted indoles
This invention relates to compositions of matter classified in the art of chemistry as substituted 2-[(methylsulfinyl)acetyl]-3-heterocyclicindoles, various...
US-4,328,303 Preparation of metal containing polymeric material via laser chemistry
The production of polymeric bodies having included, isolated areas of fine metal or metal oxide particles dispersed therein by mixing a metal compound with a...
US-4,325,698 Molecular model for chemistry
A molecular model building set for the formation of models of molecules and compounds primarily in the field of organic chemistry is disclosed. The set includes...
US-4,321,413 Production of ethylene glycol dialkyl ethers using dialkyl ethers
A method for the production of ethylene glycol dialkyl ethers from dialkyl ethers and ethylene glycol monoalkyl ethers by means of passing these reactants over a...
US-4,320,344 Metal-alloy thermoelectric characteristic analyzer
Apparatus for identifying the metal alloy composition of a test piece. Two thermoelectric probes are brought into contact with the test piece. Both of the probes...
US-4,316,872 Ring of cells for analytical devices
A ring of cells for analytical devices operating on the centrifugal principle and photometrically measuring a sample for analysis, the system comprising a number...
US-4,314,970 Analysis system
A multicuvette rotor assembly for use in a clinical chemistry analyzer of the centrifugal type includes a body member that defines a circumferential array of...
US-4,311,706 Novel dopa/dopamine prodrugs
Novel, transient prodrug forms of dopa and dopamine have (i) the structural formula (I): ##STR1## wherein each R is independently selected from the group...
US-4,310,354 Process for producing a shape memory effect alloy having a desired transition temperature
A process for producing a shape memory effect alloy having a desired transition temperature. The process includes the steps of: providing at least one prealloyed...
US-4,299,821 Tripeptides acting on the central nervous system and a process for the preparation thereof
The invention relates to new peptide derivatives which act on the central nervous system and correspond to the general formula (I), wherein X is L-norleucyl,...
US-4,296,105 Derivatives of doxorubicine, their preparation and use
New derivatives of doxorubicine of the formula ##STR1## wherein R represents a radical of the formula ##STR2## wherein R.sub.1 represents hydrogen,...
US-4,287,068 Powdered metal filter composition and processes for producing the same
A powdered metal filter composition and processes for producing the same by water atomization in which the composition exhibits an apparent density, ...
US-4,286,986 Ferritic stainless steel and processing therefor
Careful control of chemistry, and in particular niobium, and of annealing temperatures provides a ferritic stainless steel of improved creep strength. Annealing...
US-4,283,540 Process for the preparation of cationic naphtholactam dyestuffs
Water-soluble cationic dyestuffs are prepared by the reaction of dyestuffs of the formula ##STR1## wherein R and R.sub.1 represent alkyl, R.sub.2 represents...
US-4,278,763 Diagnostic agents for the detection of proteolytic enzymes
The present invention provides a diagnostic agent for the detection of proteolytic enzymes, comprising an absorbent carrier, a film layer, a powder mixture, a...
US-4,277,374 Ferritic stainless steel substrate for catalytic system
A system comprising a ferritic stainless steel substrate having a tightly adherent oxide coating and a catalytic material thereupon. The ferritic stainless steel...
US-4,275,001 Process for the manufacture of LH-RH and LH-RH analogs using Glu-His(DnP)-OH
What is disclosed is a method for the manufacture of LH-RH and LH-RH analogs, which comprises reacting Glu-His(DnP)-OH with the corresponding peptide having a...
US-4,273,679 Aluminum alloys having a high reducing capacity and preparation thereof
This invention relates to a process for the preparation of aluminum alloys having a high reducing capacity for use in reductions in organic chemistry. According...
US-4,271,173 6-Amino-spiro[penam-2,4'-piperidine]-3-carboxylic acid, antibacterial compositions thereof and method of use...
6-Amino-spiro[penam-2,4'-piperidine]-3-carboxylic acid derivatives having the formula ##STR1## wherein R is a methyl, phenyl or benzyl radical, Z.sub.1 is a...
US-4,268,670 Process for the preparation of benzimidazolylbenzofuranes
Optical brighteners of the formula ##STR1## wherein the radicals R.sub.1 to R.sub.9 are substituents customary in brightener chemistry, A.sup..crclbar....
US-RE30,610 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-4,264,878 CO Chemical laser produced by laser induced chemistry of CSCl.sub.2
The R.sub.(48) (992 cm.sup.-1) line of a tunable cw multiline CO.sub.2 laser is used to dissociate thiophosgene (CSCl.sub.2) to produce the excited radical, CS*,...
US-4,264,529 Method for preparing p-aminophenol
This invention relates to the field of organic chemistry, and more particularly, to a method for the preparation of p-aminophenol.
US-4,263,256 Cuvettes for automatic chemical apparatus
The invention relates to cuvettes for use in apparatus for the examination of liquid samples, such as automatic chemistry apparatus. Cuvettes are formed as a...
US-4,262,121 Hexahydropyrimid-4-yl ethers and their preparation
Novel hexahydropyrimid-4-yl ethers and a process for the preparation of hexahydropyrimid-4-yl ethers by reacting hexahydropyrimidines with alcohols at above...
US-4,259,288 Automatic multichannel apparatus for performing analyses on fluids, in particular for performing...
An automatic multichannel apparatus for performing analyses on fluids, comprising, in combination, an array of sample-holder test tubes, mounted on an...
US-4,257,853 Metal plating process
A metal plating process and apparatus is disclosed and includes a plurality of pre-plating stations comprising tanks or reservoirs containing various cleaning...
US-4,257,763 Low NOx burner
A low NOx burner for a furnace operating under natural draft in which primary and secondary combustion air are provided to a first burning zone, in which either...
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