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Searching: chemistry
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| Patent # | Description |
|---|---|
| US-4,424,349 |
Process for the preparation of cationic hydrazone dyestuffs Dyestuffs of the general formula ##STR1## wherein R.sub.1 denotes alkyl, alkenyl, aralkyl or cycloalkyl, R.sub.2 denotes hydrogen, alkyl, alkenyl, aryl, aralkyl... |
| US-D272,087 |
Clinical chemistry analyzer |
| US-D271,619 |
Specimen cup assembly for a clinical chemistry analyzer |
| US-4,415,857 |
Non-polarizing electrode system for geophysical prospecting and the like In electrical geophysical prospecting and in well-logging, in which potential is applied to the earth to cause direct current (or low frequency alternating... |
| US-4,412,005 |
Determination of total bilirubin A direct, spectrophotometric method for determining the total bilirubin content of an aqueous liquid is provided by detecting the absorption spectrum of the... |
| US-4,411,946 |
Impregnating paper with 7-hydroxy-coumarin compounds 7-Hydroxy-coumarin compounds of the general formula ##STR1## wherein A represents a heterocyclic radical, which can contain non-ionic substituents customary... |
| US-4,411,713 |
Shell for a composite roll In the manufacturing of a shell for a cast iron rolling mill roll, heating the chill prior to casting so that the chill at the time pouring commences is in the... |
| US-4,409,182 |
Colorimeter test kit apparatus A method and apparatus for the colorimetric testing of non-opaque fluids that comprises compact test kit apparatus made from readily available plastic... |
| US-4,404,379 |
Cycloaminals and a process for their preparation The present invention is concerned with a new class of compounds prepared by reacting cyclic aminals of the formula ##STR1## with polyisocyanates of the... |
| US-4,400,481 |
Finisher and preserver for lithographic plates Finisher and preserver compositions are provided for desensitizing the non-image areas and protecting the image areas of lithographic plates of either the... |
| US-4,399,131 |
Cephem derivatives What are disclosed are cephem compounds of the formula ##STR1## in which R.sub.1 denotes hydrogen, an optionally substituted alkyl, acyl, arylsulfonyl or... |
| 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... |
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