| Patent Number |
Title Of Patent |
Date Issued |
| 6855174 |
Couplers for use in oxidative hair dyeing |
February 15, 2005 |
| Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): ##STR1##wherein X is selected from halogen and R.sup.5 SO.sub.4 where the halogen is preferably Cl, Br or I; R, R.sup.1 and R.sup.2 are each individually selected from C.sub.1 to C. |
| 6750337 |
Couplers for use in oxidative hair dyeing |
June 15, 2004 |
| Couplers for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): ##STR1##wherein X is selected from halogen and R.sup.5 SO.sub.4 where the halogen is preferably Cl, Br or I; R, R.sup.1 and R.sup.2 are each individually selected from C.sub.1 to C. |
| 6379399 |
Oxidation hair dyeing systems and process for providing more equalized coloration on new and old |
April 30, 2002 |
| Oxidative hair dyeing systems are provided that are "root seeking", i.e., which produce more intense initial coloration on new growth, less porous hair compared to the initial coloration produced in older, damaged, more porous hair. More equalized coloration along the shaft of hair can b |
| 6313313 |
Synthesis of melanoquaternary compounds and their use as hair dyes and for skin treatment |
November 6, 2001 |
| Water soluble, cationic compounds useful as hair colorants or for the treatment of skin which are esters or amides formed by reaction of 5,6-dihydroxyindole-2-carboxylic acid or its N-substituted derivatives and a quaternary salt containing a reactive amino or hydroxyl group, and pol |
| 6160127 |
Process for the preparation of substituted indoles |
December 12, 2000 |
| A process for the preparation of 5,6-disubstituted indoles in which a 4-5-disubstituted-2,.beta.-nitrostyrene is subjected to a reductive cyclization in the presence of a water soluble dithionite salt. |
| 5980586 |
Oxidative hair dyeing process with dihydroxybenzenes and aminoethanethiols |
November 9, 1999 |
| A process of dyeing hair by preparing and applying to the hair an aqueous reaction medium comprising an aminoethanethiol, a dihydroxybenzene and a ferricyanide or persulfate oxidizing agent, the composition optionally containing a color modifier selected from the group consisting of dire |
| 5961991 |
Melanoquaternary compounds and their use as hair dyes and for skin treatment |
October 5, 1999 |
| Water soluble, cationic products useful as hair colorants or for the treatment of skin which are esters or amides formed by reaction of melanin and a quaternary salt containing a reactive amino or hydroxyl group, as well as compositions containing them and methods of using such products |
| 5827330 |
Synthesis of quarternary melanin compounds and their use as hair dyes or for skin treatment |
October 27, 1998 |
| Water soluble, cationic products useful as hair colorants or for the treatment of skin which are esters or amides formed by reaction of melanin and a quaternary salt containing a reactive amino or hydroxyl group, as well as compositions containing them and methods of using such products |
| 5792220 |
Dyeing hair with melanin procursors in the presence of iodate and peroxide |
August 11, 1998 |
| The present invention concerns improved processes for dyeing keratinous fibers especially hair on the human scalp using a two-step oxidation process for the oxidation of the melanin precursors 5,6-dihydroxyindoline (DHIN), 5,6-dihydroxyindole (DHI), and derivatives thereof such as 5, |
| 5704949 |
Process for the manufacture of a hair dye product containing 5,6-dihydroxyindole |
January 6, 1998 |
| The present invention is directed to the preparation of an aqueous hair dyeing composition containing an effective hair dyeing amount--at least 2 mg/ml--5,6-dihydroxyindole (DHI). An aqueous hair dyeing composition is produced by reacting under essentially anaerobic conditions dopa or a |
| 5702712 |
Melanoquaternary compounds and their use as hair dyes and for skin treatment |
December 30, 1997 |
| Water soluble, cationic products useful as hair colorants or for the treatment of skin which are esters or amides formed by reaction of melanin and a quaternary salt containing a reactive amino or hydroxyl group, as well as compositions containing them and methods of using such products |
| 5686084 |
Synthesis of quaternary melanin compounds and their use as hair dyes or for skin treatment |
November 11, 1997 |
| The specification describes water soluble, cationic products useful as hair colorants or for skin care obtained by oxidative polymerization of a 5,6-dihydroxyindole-2-quaternary amides or esters, as well as compositions containing the same, methods of using the same in compositions to co |
| 5628799 |
Hair dying methods and kits which contain a dopa species, reactive direct dye, and a ferricyanid |
May 13, 1997 |
| A process for dyeing hair by preparing and applying to the hair an aqueous reaction medium comprising a dopa species, a reactive direct dye and an oxidant, said aqueous reaction medium optionally containing at least one hair dyeing agent selected from the group consisting of primary |
| 5603734 |
Hair dyeing with persulfate oxidants and catechols |
February 18, 1997 |
| A process of dyeing hair by preparing and applying to the hair an aqueous reaction medium buffered to a pH of from 7 to 11 with a bicarbonate or a TRIS buffer, a catalytic quantity of a cupric or ferrous salt, a catechol and a persulfate oxidizing agent and removing the composition after |
| 5584889 |
Oxidative hair dyeing process with dihydroxybenzenes and aminoethanethiols |
December 17, 1996 |
| A process of dyeing hair by preparing and applying to the hair an aqueous reaction medium comprising an aminoethanethiol, a dihydroxybenzene and a ferricyanide or persulfate oxidizing agent, the composition optionally containing a color modifier selected from the group consisting of dire |
| 5486619 |
Method of producing DAI from DOPA, using one reaction vessel |
January 23, 1996 |
| A method of producing and isolating 5,6-diacetoxyindole (DAI) in a single reaction vessel comprising the following steps:(a) preparing a first solution comprising dopa, water and a solubilizing agent selected from the group consisting of an acid having a pk.sub.a value equal to or less t |
| 5474578 |
Erasable hair dyeing process |
December 12, 1995 |
| A hair fiber having a first color is contacted with a dye having the formula I, formula II, formula III or a mixture thereof whereby the fiber has imparted to it a second color, upon subsequent contact with alkaline peroxide the visual appearance of the first color is restored to the |
| 5441542 |
Process and kit for post-oxidative treatment of permanently dyed hair |
August 15, 1995 |
| A process for increasing the amount of melanin formation following hair dyeing by ferricyanide oxidation of a dopa species hair colorant utilizing a post-oxidant such as sodium periodate at a controlled pH and compositions and kits for use in the process. |
| 5435810 |
Hair dyeing process with aminoalkylthio substituted dihydroxybenzene and oxidative agents |
July 25, 1995 |
| A process of dyeing hair by preparing and applying to the hair an aqueous reaction medium comprising an aminoethanethio substituted dihydroxybenzene and a periodate, iodate, ferricyanide or persulfate oxidizing agent, the composition optionally containing a color modifier selected from t |
| 5374288 |
Oxidative hair dyeing method, composition, and kit utilizing hydroxyl substituted benzothiazines |
December 20, 1994 |
| A process of dyeing hair by preparing and applying to the hair an aqueous reaction medium comprising dihydroxybenzothiazine and a periodsate, iodate, ferricyanide or persulfate oxidizing agent, the composition optionally containing a color modifier selected from the group consisting |
| 5368610 |
Use of metal salts and chelates together with chlorites as oxidants in hair coloring |
November 29, 1994 |
| The invention provides methods, compositions and kits for oxidative hair dyeing utilizing an oxidative hair dye precursor, and an alkali metal chlorite together with a water soluble copper, iron, manganese or cobalt salt, a chelate of said salts or a mixture of said salts and chelates. |
| 5279618 |
Process and kit for dyeing hair |
January 18, 1994 |
| A process for dyeing hair by preparing and thereafter applying to the hair an aqueous reaction medium comprising dopa and an oxidant, said aqueous reaction medium further containing at least one hair dyeing agent selected from the group consisting of primary intermediates and couplers an |
| 5279617 |
Process and kit for dyeing hair |
January 18, 1994 |
| A process for dyeing hair by preparing and thereafter applying to the hair an aqueous reaction medium comprising a substituted dopa species and an oxidant which is a ferricyanide salt, said aqueous reaction medium further containing a buffer to maintain the pH in the range from 6 to 10 d |
| 5273550 |
Process and kit for dyeing hair |
December 28, 1993 |
| A process for dyeing hair by preparing and thereafter applying to the hair an aqueous reaction medium comprising dopa and an oxidant selected from ferricyanide and permanganate salts, said aqueous reaction medium further containing a buffer to maintain the pH in the range from 6 to 10 du |
| 5034014 |
Hair dye composition and method |
July 23, 1991 |
| An aromatic amine, or a cosmetically acceptable salt thereof, is reacted with an aromatic aldehyde in a reaction medium containing water. 2,6-dihydroxypyridine, or a cosmetically acceptable salt thereof, is reacted with hydrogen peroxide in a reaction medium containing water. The two |
