Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6313313 | Synthesis of melanoquaternary compounds and their use as hair dyes and for skin treatment | Gottfried Wenke | 2001-11-06 |
| 6160127 | Process for the preparation of substituted indoles | Gottfried Wenke | 2000-12-12 |
| 5961991 | Melanoquaternary compounds and their use as hair dyes and for skin treatment | Gottfried Wenke | 1999-10-05 |
| 5827330 | Synthesis of quarternary melanin compounds and their use as hair dyes or for skin treatment | Gottfried Wenke | 1998-10-27 |
| 5792220 | Dyeing hair with melanin procursors in the presence of iodate and peroxide | Gottfried Wenke | 1998-08-11 |
| 5704949 | Process for the manufacture of a hair dye product containing 5,6-dihydroxyindole | Gottfried Wenke, Leszek J. Wolfram | 1998-01-06 |
| 5702712 | Melanoquaternary compounds and their use as hair dyes and for skin treatment | Gottfried Wenke | 1997-12-30 |
| 5686084 | Synthesis of quaternary melanin compounds and their use as hair dyes or for skin treatment | Gottfried Wenke | 1997-11-11 |
| 5628799 | Hair dying methods and kits which contain a dopa species, reactive direct dye, and a ferricyanide oxidant | Gottfried Wenke | 1997-05-13 |
| 5545399 | Cosmetic composition | Caroline Marian Lee, Martin Richard Green | 1996-08-13 |
| 5441542 | Process and kit for post-oxidative treatment of permanently dyed hair | Gottfried Wenke | 1995-08-15 |
| 5346509 | Process for dyeing hair by the sequential treatment of hair with metal ion-containing composition and with a dye composition containing 5,6-dihydroxyindole-2-carboxylic acid and certain derivatives thereof | Thomas M. Schultz, Keith C. Brown, Leszek J. Wolfram | 1994-09-13 |
| 5279617 | Process and kit for dyeing hair | Leszek J. Wolfram, Gottfried Wenke | 1994-01-18 |
| 5279618 | Process and kit for dyeing hair | Leszek J. Wolfram, Gottfried Wenke | 1994-01-18 |
| 5273550 | Process and kit for dyeing hair | Leszek J. Wolfram, Gottfried Wenke | 1993-12-28 |
| 4904274 | Coloring hair with aminoalkyl-or aminohydroxyalkyl-catechols | Thomas M. Schultz, Leszek J. Wolfram, Keith C. Brown | 1990-02-27 |