Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7198648 | Coupling component for oxidative hair dyes | Frank Naumann, Astrid Kleen, Horst Hoeffkes | 2007-04-03 |
| 7135047 | M-phenylenediamine derivatives as coupler components for the coloring of keratinic fibers | Georg Knuebel, Horst Hoeffkes, Ralph Nemitz | 2006-11-14 |
| 7081140 | Developer components and their use for dyeing keratinic fibers | Georg Knuebel, Horst Hoeffkes, Helmut Giesa | 2006-07-25 |
| 6863698 | Agent for dyeing keratin containing fibers | Horst Hoeffkes, David Rose | 2005-03-08 |
| 6835211 | Direct hair dyes and use thereof | David Rose, Horst Hoeffkes | 2004-12-28 |
| 6814761 | Direct hair colorants | Frank Naumann, David Rose, Horst Hoeffkes | 2004-11-09 |
| 6660045 | Hair colorant preparation | Horst Hoeffkes, Norbert Schettiger, Konstantin Goutsis | 2003-12-09 |
| 6635241 | Aminophenol derivatives and their use in oxidative hair dyes | David Rose, Horst Hoeffkes | 2003-10-21 |
| 6284003 | Oxidation colorants comprising 2-(2,5-diaminophenyl)-ethanol compounds and 2-chloro-6-methyl-3-aminophenol compounds | David Rose, Horst Hoeffkes | 2001-09-04 |
| 6203579 | Use of 1-substituted isatins to dye fibers containing keratin | Hinrich Moeller, Horst Hoeffkes, David Rose | 2001-03-20 |
| 6165230 | 1,4-diazacycloheptane derivatives and their use in hair oxidation dyes | David Rose, Horst Hoeffkes | 2000-12-26 |
| 5752984 | Use of 1,2,3,4-tetrahydroquinoxalines as oxidation dye precursors in oxidative coloring formulations | Georg Knuebel, David Rose, Horst Hoeffkes | 1998-05-19 |