Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6828443 | Dyes and colorants | Detlef Hollenberg, Horst Hoeffkes, Frank Naumann, David Rose, Joachim-Kurt Foitzik | 2004-12-07 |
| 5704949 | Process for the manufacture of a hair dye product containing 5,6-dihydroxyindole | Giuseppe Prota, Gottfried Wenke | 1998-01-06 |
| 5665336 | Acidic post-treatment of hair dyed with dihydroxyindole | — | 1997-09-09 |
| 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, Giuseppe Prota | 1994-09-13 |
| 5279617 | Process and kit for dyeing hair | Giuseppe Prota, Gottfried Wenke | 1994-01-18 |
| 5279618 | Process and kit for dyeing hair | Giuseppe Prota, Gottfried Wenke | 1994-01-18 |
| 5273550 | Process and kit for dyeing hair | Giuseppe Prota, Gottfried Wenke | 1993-12-28 |
| 5173085 | Hair dyeing process and compositons package | Keith C. Brown, Bryan Patrick Murphy | 1992-12-22 |
| 5161553 | Process for simultaneously waving and coloring hair | David Cohen | 1992-11-10 |
| 5032138 | Chlorites as oxidants in hair coloring | Thomas M. Schultz, Alice Mayer, Keith C. Brown | 1991-07-16 |
| 5015263 | Composition for coloring skin and method | Linda Albrecht | 1991-05-14 |
| 4975092 | Processes for coloring and/or conditioning hair | Alexander Chan, Yuh-Guo Pan | 1990-12-04 |
| 4968497 | Skin tanning composition and method | Alexander Chan, Thomas M. Schultz, Bryan Patrick Murphy | 1990-11-06 |
| 4911731 | Process and composition for dyeing hair utilizing an anionic polymeric/cationic polymer complex | Norman P. Loveless, Keith C. Brown | 1990-03-27 |
| 4904274 | Coloring hair with aminoalkyl-or aminohydroxyalkyl-catechols | Thomas M. Schultz, Keith C. Brown, Giuseppe Prota | 1990-02-27 |
| 4770873 | Neutralizing composition and method for hair waving and straightening | David Cohen | 1988-09-13 |
| 4695285 | Process for coloring keratinaceous materials | Alexander Chung-Bong-Chan | 1987-09-22 |
| 4663158 | Hair conditioning composition containing cationic polymer and amphoteric surfactant and method for use | David Cohen | 1987-05-05 |
| 4601299 | Hair setting process and tissue | Linda Albrecht | 1986-07-22 |
| 4588760 | Hair treatment composition | Janusz Jachowicz | 1986-05-13 |
| 4559057 | Process and composition for coloring hair with pigments | Herman Bogaty, Keith C. Brown, Norman P. Loveless | 1985-12-17 |
| 4529586 | Hair conditioning composition and process | Richard De Marco, Joseph J. Varco, Michael Wong | 1985-07-16 |
| 4416297 | Hair waving or straightening process and product | David Cohen, Norman N. Tehrani | 1983-11-22 |