Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7371466 | Polymerisation initiators, polymerisable compositions, and uses thereof for bonding low surface energy substrates Quaternary boron salts are used as initiators of polymerisation in adhesive compositions for bonding low surface energy substrates such as polyolefins. The quaternary boron salts are of the formula I wherein R1 i... | 05/13/2008 |
| 6903082 | Methods of treating inflammatory conditions of the gastrointestinal tract using 4-APAA and compositions thereof Compounds are disclosed having the structure of Formula I: where R1, R3, and R4 are independently hydrogen or C1 to C4 alkyl, and R2 is: | 06/07/2005 |
| 6583128 | Immunoregulatory compounds and derivatives and methods of treating diseases therewith Compounds are disclosed having the structure of Formula I: ##STR1## where R1, R3, and R4 are independently hydrogen or C1 to C4 alkyl, and R2 is: ##STR2## where R5 is selected fr... | 06/24/2003 |
| 6191265 | Thermomigrationfast azo dyes Azo dyes of the formula ##STR1## wherein the substituents are each as defined in the description, are useful for dyeing and printing synthetic textile materials.... | 02/20/2001 |
| 6124504 | Process for preparing 4-hydroxyanilines The application describes a process for preparing 4-hydroxyanilines by the reaction of phenols with diazonium salts and subsequent reduction.... | 09/26/2000 |
| 6072042 | Bis(aminocarbonylnaphthol) derivative The present invention provides a bis (aminocarbonylnaphthol) derivative which is useful as a raw material for novel azo pigments by bisamidation of each one carboxyl group of two 2-hydroxynaphthalene-3,6-dicarboxylic acids using an aliphatic or aromatic d... | 06/06/2000 |
| 5428138 | Red 2,6-dicyanophenylazo dyes and the preparation and use thereof The azo dyes of the formula I ##STR1## where X1 is for example hydrogen or (C1 to C6)alkyl, X2 is cyano or nitro, X3 is for example hydrogen or (C1 to C4)alkoxy, X4 is for ... | 06/27/1995 |
| 5262330 | Colorimetric methods and reagents for the assay of calcium in a test sample A chromogenic compound found to be especially selective in the determination of calcium in blood of the general formula (I): ##STR1## where: R is hydrogen or lower alkyl; X is CH2, CH2 CH2, CH.dbd.CH, O, S, SO2,... | 11/16/1993 |
| 5047516 | Azo compound suitable for use in non-linear optics An azo compound of the formula: ##STR1## wherein R is an non-hydrophilic aliphatic or cycloaliphatic group containing from 8 to 40 carbon atoms; m is 0 or 1; R1 is NO2, CN or COOR2 ; R2 is H or C1-4 -... | 09/10/1991 |
| 4889846 | 3-(2,5-disubstituted phenylazo)-4-substituted phenylalkan-1-oic acids and esters thereof and method of treating inflammatory disorders therewith The invention concerns azo compounds of formula ##STR1## or a salt thereof, in which formula R1, R2, R3, R4, R5, and R6 are each independently hydrogen or lower alkyl, R7 an... | 12/26/1989 |
| 4841009 | Substantially linear monomeric composition and liquid crystal polymeric compositions derived therefrom Described herein are novel substantially linear monomeric compositions which can be polymerized with one or more difunctional monomers to give novel polymeric compositions having liquid crystal properties. This invention is also directed to a process for ... | 06/20/1989 |
| 4835284 | Method for preparing 2-phenylbenzotriazoles and 2-phenylbenzotriazole-N-oxides This invention relates to a method for preparing 2-phenylbenzotriazoles having the formula I, ##STR1##... | 05/30/1989 |
| 4804747 | Azo compound having one or two aliphatic or cycloaliphatic groups containing a total of 8 to 40 carbon atoms therein (i) A compound of the formula: ##STR1## wherein R is H, a metal or a group containing a tetravalent N atom; X is S, O, ##STR2## R1 is NO2, CN or COOY; Y is H, C1-4 -alkyl, a metal or a group containing a tetraval... | 02/14/1989 |
| 4769447 | Gamma-Glutamyl-4-azoanilides The present invention provides gamma-glutamyl-4-azoanilides, processes for their preparation and their use as substrates for gamma-glutamyl transferase determination, of the formula ##STR1## wherein X is alkyl, --(CH2)m --COOH o... | 09/06/1988 |
| 4725676 | 5-(3,5-disubstituted phenylazo)-2-hydroxybenzene-acetic acids and salts and lactones thereof having a potentially inhibitory effect on 15-hydroxy-prostaglandin dehydrogenase The present invention is concerned with azo compounds having the structure ##STR1## in which: Y is hydrogen, and X and Z are carboxy or lower alkoxycarbonyl, or the lactones or salts of said azo compound, such compounds being useful in pharmaceutical comp... | 02/16/1988 |
| 4628083 | 2-hydroxy-5-(arylazo)-benzene alkanoic acids The invention relates to new arylazo compounds of the general formula ##STR1## wherein R1 and R2 independently of each other represent hydrogen or C1-3 alkyl, R3 represents hydrogen, halogen, C1-3 alk... | 12/09/1986 |
| 4341528 | Simple, non-chromatographic, highly specific method for the determination of urinary vanilmandelic acid The Habbal reaction as a simple spectrophotometric method for the determination of urinary vanilmandelic acid (VMA) is presented. The Habbal reaction is based on the diazo reaction, the specificity of which is maximally increased by citrate buffer extract... | 07/27/1982 |
| 4257942 | New water-insoluble azo dyes The present invention relates to the synthesis of new dyes having the following general formula: ##STR1## wherein: D is the residue of a diazotizable component of the carbocyclic or heterocyclic series X is an ethylene group, optionally substituted b... | 03/24/1981 |
| 4153599 | Monoazo-dyes particularly suited to the levelled dyeing of synthetic polyamide fibers Novel monoazo dyes (sparingly soluble in water) which are free of sulphonic groups and which contain an aliphatic-carboxylic chain directly bound to the aryl nucleus of the coupling compound are particularly useful in uniformly dyeing polyamide fibers and... | 05/08/1979 |
| 4145342 | Nitro-diphenylamino-azo-phenyl dyestuffs containing a polyalkyeneoxy group Disperse dyestuffs of the formula ##STR1## wherein Q1 and Q2 are hydrogen or the group V-(A-O)n Z, but do not at the same time represent hydrogen, A -- denotes an alkylene group, V -- denotes a direct bond or a bridge memb... | 03/20/1979 |
| 4077765 | Monoazo-dyes particularly suited to the levelled dyeing of synthetic polyamide fibers Novel monoazo dyes (sparingly soluble in water) which are free of sulphonic groups and which contain an aliphatic-carboxylic chain directly bound to the aryl nucleus of the coupling compound are particularly useful in uniformly dyeing polyamide fibers and... | 03/07/1978 |
| 3962209 | Process for preparing azo dyestuffs with ortho-azo cyano groups by cyano exchange of metal cyanides and halo dyestuffs Azo dyestuffs having the formula ##EQU1## in which A is an aromatic carbocyclic radical containing the CN substituent in the o-position to the azo group and K is the radical of a coupling component as well as the process for their production are ... | 06/08/1976 |
