| Patent Number |
Title Of Patent |
Date Issued |
| 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. |
| 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 |
| 5545399 |
Cosmetic composition |
August 13, 1996 |
| A composition for topical application to the skin in order to promote the repair of photo-damaged or aged skin and/or to reduce or prevent damaging effects of ultra-violet light on skin and/or to lighten the skin comprising a hydrocalchone of general structure: ##STR1## wherein R |
| 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. |
| 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 |
| 4904274 |
Coloring hair with aminoalkyl-or aminohydroxyalkyl-catechols |
February 27, 1990 |
| A process for coloring hair in which a functional metal ion and aminoalkyl or aminohydroxyalkyl catechols are used in combination or applied sequentially to dye the hair rapidly. |
