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| Number | Title | Issue Date |
| 7439341 | Fluorescence quenching azo dyes, their methods of preparation and use Disclosed is a group of azo quencher compositions useful as fluorescence quenchers having the general structure of formula 1, methods of making or using the compositions, and kits comprising the composition. ... | 10/21/2008 |
| 7341605 | 2-(Amino or substituted amino)-5, 6-substituted phenol compounds, dyeing compositions containing them, and use thereof The present invention relates to 2-(amino or substituted amino)-5,6-substituted phenol compounds according to the Formula (I), as defined herein and compositions for the oxidative dyeing of keratin fibres, comprising a medium suitable for dyeing and a compound of th... | 03/11/2008 |
| 6878792 | Dye for an intraocular lens and an intraocular lens using it The present invention provides lenses for eyes having visible light transmission properties near to those of human crystalline lenses, particularly coloring techniques effective for soft lenses for eyes. The present invention is a yellow dye capable of chemical bond... | 04/12/2005 |
| 6599748 | Hardness indicator composition and method of water hardness analysis A hardness indicator composition, and a method of water hardness analysis, capable of measuring hardness even with higher-hardness water without requiring titration by a two-liquid system. The hardness indicator composition is formulated of a metal indica... | 07/29/2003 |
| 6183549 | Ink compositions containing monoazo dyes Compounds of Formula (1) and salts thereof: ##STR1## wherein: Ar1 is substituted aryl wherein at least one substituent is --COOH; R1 is H or optionally substituted alkyl; L is substituted phenyl carrying at least one substituent at the 2-... | 02/06/2001 |
| 5874547 | Diazotization of amines A process for diazotizing an amine comprises the steps of oxidizing nitric oxide in solution with an oxidizing agent to maintain an equilibrium concentration of a diazotizing agent and reacting a primary aromatic amine in situ with said diazotizing agent ... | 02/23/1999 |
| 5719270 | Azophenyl compounds Azophenyl compounds of the formula: ##STR1## wherein R1 is an o-, p-directing substituent; R2 is a substituted or unsubstituted ଲ-hydroxyalkyl group; R3 is an aromatic carbocyclic or heterocyclic group which is ... | 02/17/1998 |
| 5428137 | Monoazo liquid dye and solutions thereof The monoazo compound represented by formula I is excellent in compatibility with, solubility in, and coloring power for, almost all water-immiscible organic liquids, has a low melting point, and is suitable for use to color molten plastics, synthetic fibe... | 06/27/1995 |
| 5204454 | Prepolymeric polyols containing mesogenic units Prepolymer polyols containing mesogenic moieties useful as reactants for the preparation of resinous materials are disclosed. Synthesized by condensing a polyether polyol with bifunctional mesogenic diacids, or diesters, the compounds of the invention are... | 04/20/1993 |
| 5194389 | Naphthol derivatives, processes for their production and their use The subject matter of the present invention are naphthol derivatives having the general formula I ##STR1## in which R1, R2, R3 are the same or different and each represents hydrogen, an alkyl or alkoxy group, in which... | 03/16/1993 |
| 5006128 | Substituted 2,4-di[4'-(disulfonaphth-2"-ylazo)phenylamino]-6-amino-1,3,5-triazines Compounds of the formula ##STR1## and salts thereof, wherein R1 is hydrogen or methyl, R2 is hydrogen, methyl or acetamido, R3 is hydrogen, methyl or methoxy, R4 is hydrogen, C1-4 alkyl or hydroxy(C2-... | 04/09/1991 |
| 5003051 | Process for the preparation of metallizable monoazo dyes in the presence of ketones A process for the preparation of azo dyes of the formula ##STR1## in which X is --NH2 or --OH, A is a benzene or naphthalene radical which can be substituted by nitro, halogen, sulfo, C2 -C6 alkanoylamino, C1 | 03/26/1991 |
| 4952677 | Azo colorants for ball point pen and ribbon inks Reddish-brown to yellow shade colorants suitable for ribbon and ball point inks are produced from the glassy waste by-product of pararosaniline manufacture by slurrying the residue in mineral acid, diazotizing, and coupling. the resulting colorants are us... | 08/28/1990 |
| 4920206 | Process for making azo pigments Azo Pigments are made by subjecting a diazo component to an azo coupling reaction with the equivalent quantity of a coupling component difficultly soluble at less than 65° C. in the aqueous/acid and aqueous/neutral pH-ranges. More specifically, an aqueou... | 04/24/1990 |
| 4920205 | Process for making azo pigments Azo pigments are made by subjecting a diazo component to an azo coupling reaction with the equivalent quantity of a coupling component difficultly soluble at less than 65° C. in the aqueous/acid and aqueous/netural pH-ranges. More specifically, an aqueou... | 04/24/1990 |
| 4906741 | Azo dimers containing the hexafluoroisopropylidene group The invention is directed toward compounds having the formula: ##STR1## wherein A is a substituent independently selected from the group consisting of lower alkyl having from 1 to 3 carbon atoms, chloro or fluoro; n is an integer independently select... | 03/06/1990 |
| 4840642 | Monoazo compounds having a 6-(5'-chloro-2',4'-difluoropyrimid-6'-ylamino)-1-hydroxy-3-sulfonaphthal ene group and their use as dyes Compounds of the formula ##STR1## and salts thereof, useful for dyeing and printing hydroxy group - or nitrogen-containing organic substrates, for example, leather and fibrous materials containing or consisting of natural or synthetic polyamides or ... | 06/20/1989 |
| 4804415 | Process for producing azo pigment A process for producing an azo pigment, which comprises coupling an aromatic diazonium compound with 3-hydroxy-2-naphthoic acid and at least one binaphthol and optionally, laking the resulting pigment.... | 02/14/1989 |
| 4760187 | Process for reducing chloronitrobenzenes using ruthenium with a minor amount of platinum as the catalyst A process for reducing chloronitrobenzenes to the corresponding chloroanilines using a combination ruthenium-platinum catalyst is disclosed. The ratio of ruthenium to platinum in the catalyst is from 75:1 to 30:1. The pressure used is from 200 to 800 psi ... | 07/26/1988 |
| 4647310 | Aqueous ink composition for ink jet-recording An aqueous ink composition for ink-jet recording comprising an aqueous solution of a water-soluble dye of formula (I) and a humectant dissolved in water: ##STR1## wherein Ar represents an unsubstituted or substituted phenyl group, or an unsubsti... | 03/03/1987 |
| 4617382 | 8-hydroxyquinoline sulfonic acid-azo chromium complexes The present invention relates to novel chromium complex dyes of the formula ##STR1## wherein Z is hydrogen, chloro, bromo, nitro, lower alkyl or acylamino; L is H2 O, ammonia, ethanol or ethanolamine; Y is --O--or --COO--; Y' is --O--, --NH--, --N(l... | 10/14/1986 |
| 4560744 | Azo dye 2:1-chromium complexes Compounds which in the form of the free acids correspond to the formula ##STR1## where A is a radical of a diazo component or of an amine, B is a radical of a coupling component or of an aldehyde, R1 is chlorine or bromine, R2 is methoxy ... | 12/24/1985 |
| 4486347 | Flame retarding antimicrobial halogenated azo dyestuffs The halogenated azo dyestuffs of the present invention possess fire-proofing and antimicrobial properties and have the following general formula: ##STR1##... | 12/04/1984 |
| 4454067 | Continuous production of azo pigments The invention relates to a process for the continuous manufacture of azo pigments, wherein a coupling component is reacted, inside a reaction zone filled with a previously produced suspension of the azo pigment to be made, with an aqueous solution of a di... | 06/12/1984 |
| 4416815 | Fiber-reactive unsymmetrical 1:2 chromium complex azo dyes Chromium complex dyes which, in the form of the free acid, have the formula ##STR1## wherein Z is hydrogen, nitro, chlorine, or an arylazo group, Q is a nitrogen atom or the CH-- group, A is the radical of a coupling component which couples in the or... | 11/22/1983 |
| 4396544 | Asymmetric 1:2 chromium complexes of monoazo compounds 1:2 Chromium complexes of the formula, ##STR1## in which R1 is hydrogen, chlorine, bromine, nitro (being meta to the first nitro group), C1-4 alkyl or C1-4 alkoxy, R2 is hydrogen or nitro, Y is ##STR2## ... | 08/02/1983 |
| 4341701 | Production of pigments A process for producing monoazo or disazo pigments, which process comprises: (a) adding to a solution of a diazonium and/or tetrazonium salt of an aromatic or heterocyclic amine a solution or suspension containing 0.1-50% by weight of the theoretically re... | 07/27/1982 |
| 4331596 | Arylazoarylazo-substituted azo, azomethine 1:2 chromium complex dyes 1:2 Chromium complex dyes of the formula ##STR1## wherein A is the radical of a diazo component of the benzene or naphthalene class which carries the complex forming group X in ortho-position to the azo group, B is the radical of a coupling component... | 05/25/1982 |
| 4322415 | Stable concentrated liquid preparations of metal complex dyes Stable concentrated liquid preparations of metal complex dyes are provided. These preparations contain (1) a metal complex dye, (2) a non-ionic compound having a hydrotropic action and at least one of components (3) or (4), component (3) being a reaction ... | 03/30/1982 |
| 4314937 | 1:2 Chromium unsymmetrical complexes of azo and disazo dyes Chromium complex dyes of the formula ##STR1## wherein represents a halogen atom, a C1 -C5 -alkyl group, a C1 -C2 -alkoxy group, a nitro group, a C2 -C3 -alkanoylamino or C2 ... | 02/09/1982 |
| 4256633 | Chromium complex compounds, process for their manufacture and use thereof Bis-1:2 chromium complex dyes consisting of 2-chromium atoms, 2 molecules of a metallizable azo or azomethine compound and a bisazomethine of the formula ##STR1## wherein X is a direct bond or a bridge member, R1 is hydrogen or a subs... | 03/17/1981 |
| 4219473 | Substituted unsymmetrical azo, azomethine 1:2 chromium complexes 1:2 Chromium complex dyes of the formula ##STR1## wherein A represents the radical of a phenol substituted by alkyl and/or acylamino or of a 2-naphthol optionally substituted by acylamino, one V represents hydrogen and the other hydrogen or nitro, X ... | 08/26/1980 |
| 4216147 | N-methyl-N-(substituted carbonylaminothio)carbamates N-methyl-N-(substituted carbonylaminothio)carbamates exhibit high insecticidal and/or nematicidal activity with reduced phytotoxicity.... | 08/05/1980 |
| 4212801 | Unsymmetrical 1:2-chromium complexes containing an azo and an azomethine bond 2:1-chromium complex dyes of the formula: ##STR1## in which: A is the radical of a carbocyclic diazo component with a complex-forming hydroxy or carboxy group adjacent to the azo bridge; B is the radical of a carbocyclic, heterocyclic or open-chain coupli... | 07/15/1980 |
| 4207266 | Process for the preparation of trifluoromethylated aromatic compounds This invention relates to a novel process for the direct trifluoromethylation of aromatic compounds via carbon tetrachloride and hydrogen fluoride in the presence of strong Bronsted or Lewis acids which give an acidic reaction (increase in concentration o... | 06/10/1980 |
| 4180502 | Manufacture of concentrated solutions, having a low salt content, of cobalt and chromium 1:2 complex dyes which are free from sulfonic acid groups A process for the manufacture of concentrated solutions, having a low salt content, of o,o'-dihydroxy-or o,o'-dihydroxycarboxy-cobalt and -chrominum 1:2 complex dyes which are free from sulfonic acid groups, wherein the metallizing is carried out in water... | 12/25/1979 |
| 4169832 | Disazo and trisazo intermediates for polyazo dyes containing a stilbenyl or 2,2'-disulfostilbenyl radical Disclosed are compounds of the formula, ##STR1## wherein THE X's are the same and are hydrogen or --SO3 M, Y is hydrogen, C1-4 alkyl, C1-4 alkoxy, hydroxy, halogen, --COOM or --SO3 M, K1 and K2 | 10/02/1979 |
| 4159264 | Automatic control of azo coupling processes in the manufacture of azo pigments Azo pigment coupling process in which the amount of excess diazo or coupling component is continuously monitored and addition of diazo component or coupling component to the reaction is automatically controlled by means of an automatic chemical analyzer w... | 06/26/1979 |
| 4141889 | Symmetrical hexakisazo compounds having a 2,2'-disulfostilbenyl central radical Symmetrical hexakisazo compounds of the formula ##STR1## and mixtures of such compounds, WHEREIN Each X is hydrogen or --SO3 M, each R1 is --OH or --NH2, each R2 is --OH or --NH2, each Y is hydrogen, methy... | 02/27/1979 |
| 4123429 | 1:1 Chromiferous complex azo compounds having a bidentate chelating group and a monofunctional neutral ligand Chromiferous complexes of the type: ##STR1## IN WHICH (I) represents the residue of a metallizable azo or azomethine compound, (II) represents the residue of a bidentate chelating agent and Z represents a monofunctional neutral ligand: process for th... | 10/31/1978 |
