Quotables
"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6409810 | Water-soluble trisazo compounds, aqueous ink composition and colored article A black recording having high solubility, being stable even after being stored for long, and capable of forming a printed image with a high optical density and excellent water and light resistances. The recording fluid contains a trisazo compound of gener... | 06/25/2002 |
| 6011141 | Acid polyazo dyes Polyazo dyes of the formula ##STR1## where n, Y1, Y2, Y3, Y4, X, R1, R2 and R3 are each as defined in more detail in the description are useful for dyeing natural or synthet... | 01/04/2000 |
| 5536819 | Trisazo compounds imparting deep black color a method for dyeing by using them and an ink containing them A trisazo compound represented by the following formula (I) in the free acid form: ##STR1## wherein Q is an phenyl or naphthyl group both of which may be unsubstituted or substituted; one of the A and B is hydroxy group and the other is amino gr... | 07/16/1996 |
| 5489671 | Trisazo compound imparting black color, method for dyeing by using it and ink containing it A trisazo compound represented by the following formula (1) in the free acid form: ##STR1## wherein Q' is phenylene group, Q2 is phenyl or naphtyl group, one of the A and B is a hydroxy group and the other is an amino group, K is 1 or ... | 02/06/1996 |
| 5488101 | Trisazo compounds, method for dyeing fiber materials, paper or leather using the same and inks containing the same Herein is provided a trisazo compound represented by formula (I) in the free acid form: ##STR1## wherein Q1 is an unsubstituted or substituted phenylene or naphthylene group, Q2 is an unsubstituted or substituted phenyl or ... | 01/30/1996 |
| 5486601 | Trisazo dye, and aqueous ink composition containing the same Disclosed is a trisazo dye represented by the formula: ##STR1## wherein R1 and R2 independently represent a substituted amino group which is substituted with hydrogen, a hydroxyl group, a carboxyl group, an amino group, an alkyl... | 01/23/1996 |
| 5478384 | Recording liquid A recording liquid excellent in print quality, light resistance, and water resistance which is characterized in that it contains an aqueous medium and at least one dye selected from the dyes represented by general formulae [I] to [V]: ##STR1## (... | 12/26/1995 |
| 5423906 | Trisazo dyes, inks comprising same and their use in ink jet printing A compound of Formula (1) or salt thereof: ##STR1## wherein: R1 is H, C1-4 -alkyl, C1-4 -alkoxy, CO2 H, SO3 H or --NR3 R4 ; R2 is H, C1-4 -alkyl, C1-4 | 06/13/1995 |
| 5340929 | Trisazo dye and dye composition containing the same The present invention provides a trisazo dye represented by the formula: ##STR1## wherein B is a substituted or non-substituted phenyl group, A is a phenyl group substituted with at least one substituent selected from the group consisting of an amino... | 08/23/1994 |
| 5336763 | Trisazo dye and dye composition containing the same The present invention provides a trisazo dye represented by the formula: ##STR1## [wherein A is a phenyl group substituted with at least one substituent selected from the group consisting of an amino group, a substituted amino group and a hydroxyl gr... | 08/09/1994 |
| 5258505 | Trisazo compounds, and dye compositions containing same Disclosed herein is an azo compound represented by the formula ##STR1## wherein R1, R2 and R3 each are a group or atom selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 4 carbon atoms, a ... | 11/02/1993 |
| 5215578 | Ink containing tris-azo dye, ink-jet recording method and apparatus using the same An ink composition that includes water, a water-soluble organic solvent and a dye. The dye is represented by the following Formula, in which the number of sulfonic acid groups and the number of amino groups are each not less than 2, and the number of sulf... | 06/01/1993 |
| 5213614 | Ink, ink jet recording process and recording apparatus using the same An ink comprising: water, a water soluble organic solvent, and a colorant represented by the following general formula (I): ##STR1## wherein Q1 is a substituted phenyl group; Q2 is a substituted or unsubstituted p-phenylene or a substituted or unsubs... | 05/25/1993 |
| 5178671 | Ink, and ink-jet recording method and apparatus employing the ink Provided is an ink comprising a recording agent and a liquid medium for dissolution or dispersion thereof, the recording agent being a compound represented by the general formula ##STR1## where R1 is a radical selected from the group of lo... | 01/12/1993 |
| 5171848 | Salts of black trisazo dyes with alkyl amines having good solubility in organic liquids Black compounds of Formula (1) having enhanced solubility in polar organic liquids which are useful as ink colorants in conventional and hot melt ink-jet printing and automatic identification, as black colorants for toners and thermal wax transfer sheets ... | 12/15/1992 |
| 5167703 | Ink, ink-jet recording process and instrument making use of the ink Provided is an ink comprising at least water, a water-soluble organic solvent, and a dye, the dye comprising a compound represented by the general formula (I): ##STR1## wherein R1, R2, and R3 are respectively hydrogen... | 12/01/1992 |
| 5127946 | Ink, and ink-jet recording method and apparatus employing the ink Provided is an ink containing a recording agent and a liquid medium for dissolution or dispersion thereof, said ink comprising, as the recording agent, a compound represented by the general formula (A) ##STR1## where n is 0 or 1; R1, R | 07/07/1992 |
| 5104979 | Polyazo dyes with diazo components of the aminophenol and the amino diphenyl-sulfide, -sulfoxide or -sulfone series Polyazo dyes useful for dyeing leather in the free form or as copper, chromium, iron, cobalt or nickel complexes have the formula ##STR1## where m is 0, 1 or 2, n is 0 or 1, p is from 1 to 2, q is from 0 to 1, and R1, R2, R... | 04/14/1992 |
| 5095100 | Metal complex dyes and preparation thereof Metal complex dyes comprising a metalizable azo compound represented by one of Formulas [I] through [IV]: ##STR1## In Formulas [I] through [IV], Ps represents a phosphono group in the form of a free acid or a salt; Sf represents a sulfo group in the ... | 03/10/1992 |
| 4996302 | Process for the preparation of polyazo dyes A process for the preparation of polyazo dyes is described which comprises (a) diazotizing a compound of the formula ##STR1## and coupling the product onto a compound of the formula ##STR2## (b) diazotizing a compound of the formula ##STR3## ... | 02/26/1991 |
| 4988804 | Polyazo dyes obtained by successive coupling of H-acid and two further anilinic diazo components on resorcinol or the like Polyazo dyes obtainable by (a) diazotizing 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid and coupling onto a compound of the formula ##STR1## (b) coupling a diazotized compound of the formula ##STR2## onto the monoazo dye thus obtained, (c) c... | 01/29/1991 |
| 4841037 | Amino sulfonaphtholtrisazo compounds and recording liquids containing the same A naphthalene trisazo compound represented by the general formula (I) or (II): ##STR1## wherein A and B each represents a substituted or unsubstituted benzene or naphthalene ring; m represents zero or 1; and M represents an alkali metal atom, am... | 06/20/1989 |
| 4737240 | Trisazo black dyes from 2-(4'-aminophenylazo)-7-amino-1-naphthol-3-sulfonic acid Black trisazo dyes for cellulosic textiles, leather and especially paper having the structure ##STR1## where A is ##STR2## one of B1 and B2 is hydrogen and the other is --SO3 M or a mixture thereof, and M is... | 04/12/1988 |
| 4734489 | Trisazo compounds useful in producing water-resistant ink compositions An azo compound of the formula: ##STR1## wherein R is of the formula: ##STR2## R1 is hydrogen, methyl or --SO3 M; R2 is hydrogen or --SO3 M; R2 is hydrogen or --SO3 M; R3 | 03/29/1988 |
| 4701525 | Polyazo dyestuffs having high UV absorption Compounds of the formula in which A is the radical of a bisazo or trisazo dye, L and L' are organic radicals and B and B' are cyclic organic radicals and at least one of the radicals B and B' has spectral absorption in the UV region and one of the radical... | 10/20/1987 |
| 4594410 | Azo compounds containing both sulfo groups and basic or cationic groups which compounds are in metal-free or 1:1 metal complex form Azo dyes of the formula ##STR1## and external salts thereof, wherein F is the residue of a monoazo or disazo compound in 1:1 metal complex form or of a trisazo, disazoazoxy or tetrakisazo compound in metal-free or 1:1 metal complex form, each X is in... | 06/10/1986 |
| 4592756 | Dye solution composition A dye solution composition containing a black dye obtained by the action of at least one acid or its salt: on one or a mixture of dyes of the formula (I): ##STR1## wherein R is phenylene or naphthylene residue; X and X' are each H, sulfonic acid grou... | 06/03/1986 |
| 4563520 | Metal complexes of dis- or trisazo compounds containing a middle component twice substituted by hydroxy and/or amino Compounds containing sulfonic acid groups and of the general formula I ##STR1## where D1 is a radical of a diazo component, X1 and X2 independently of one another are each hydroxyl or unsubstituted or substituted amin... | 01/07/1986 |
| 4491543 | Dis-, tris-, and tetrakisazo compounds containing resorcinol, sulfonylamino, and two or three sulfonic acid groups The present invention discloses substituted phenyl di and trisazo dyes free of reactive groups having two or three sulfonic acid groups, of the general formula: ##STR1## wherein D1 is ##STR2## Z is hydrogen or D4 --N.d... | 01/01/1985 |
| 4479906 | Trisazo dye Trisazo dyes containing sulfo groups and having the formula: ##STR1## which for the most part give black colorations on paper and particularly on leather and are therefore especially useful as leather dyes.... | 10/30/1984 |
| 4468348 | Trisazo dyes having a 4-(1-amino-3,6-disulfo-8-hydroxy-7-phenylazonaphthyl-2-azo)phenylazo group linked to a coupling component radical Dyes of the formula ##STR1## and mixtures thereof, in which R signifies a radical of formula (a), (b), (c), (d), (e), (f), (g) or (h) ##STR2## in which R1 signifies an amino, anilino or toluidino radical, R2 signifies ... | 08/28/1984 |
| 4443371 | Trisazo black dyes New trisazo dyes, having the structure ##STR1## in which M represents H, Na, K, Li, or N(R3)H wherein R represents --H, --CH3, --C2 H5, --C3 H7, --CH2 CH2 OH, --C... | 04/17/1984 |
| 4390470 | Tetrakisazo dyes containing a stilbenylene or 2,2'-disulfostilbenylene 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 | 06/28/1983 |
| 4263229 | Metal complex dyes of trisazo compounds having a 3,5-dinitro-2-hydroxyphenylazo group and two other arylazo groups bound to a 1-amino-3-hydroxy-1,3-diamino- or 1,3-dihydroxy-benzene nucleus Compounds of the formula ##STR1## homogeneous and heterogeneous metal complexes thereof, and mixtures of said compounds and complexes, wherein each A is independently hydroxy or amino, T is carboxy or sulpho, T1 is hydrogen, nitro, halo, alkyl,... | 04/21/1981 |
| 4255327 | Direct black dye This invention relates to a new group of trisazo compounds that are useful as direct dyes for cellulosic textiles, paper and leather; imparting a black coloration thereto. The new dye is intended to replace the widely used paper dye known as C.I. Direct B... | 03/10/1981 |
| 4235773 | Trisazo dyestuffs containing a naphtholamino sulfonic acid component and a phenylcarbonylamino-phenyl component Trisazo dyestuffs of the formula ##STR1## wherein A, B, n, C and D have the meaning given in the description. The new dyestuffs are outstandingly suitable for dyeing natural or synthetic fibre materials containing hydroxyl groups or containing nitrog... | 11/25/1980 |
| 4169831 | Water-soluble tetrakisazo dyestuffs derived from 4,4'-diaminoazobenzene Dyestuffs of the formula: ##STR1## in which C2 represents the radical of the formula: ##STR2## where X is NH2 or OH, C1 and C3 are different residues of molecules C1 H and C3 H fr... | 10/02/1979 |
| 4149851 | Concentrated aqueous dye compositions containing a low molecular weight amide Concentrated, liquid preparations of metal-free direct azo dyes, which contain in each instance 1 part by weight of dye, 1 to 8 parts by weight of water, and 0.5 to 5 or preferably 0.5 to 2 parts by weight of an amide are useful for dyeing paper in the st... | 04/17/1979 |
| 4137228 | Water-soluble, copper containing trisazo compounds having a 2-(4'phenylene)-benzimidazoyl-(5 or 6),-benzoxazolyl-(5), or -benzthiazolyl-(5) component Trisazo dyes of high tinctorial strength and excellent fastness have the structure ##STR1## where one of M and M1 is ##STR2## as more fully set out below.... | 01/30/1979 |
| 4120854 | Disazo and trisazo dyes having a 1,3-diamino-, dihydroxy- or amino-hydroxy-benzene nucleus and metal complexes thereof Compounds of the formula ##STR1## in which R1 is hydrogen or nitro, Each of R2 and R3, independently, is --OH or --NH2, R4 is hydrogen, nitro or (C1-4) alkyl, R5 is hydrogen, nitro or... | 10/17/1978 |
