Issued Patents 2004
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6835213 | Compounds for hair coloring compositions | Margaret Popp | 2004-12-28 |
| 6806372 | Coupler for use in oxidative hair dyeing | Yuh-Guo Pan, Margaret Popp | 2004-10-19 |
| 6780999 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2004-08-24 |
| 6776802 | Coupler for use in oxidative hair dyeing | Yuh-Guo Pan | 2004-08-17 |
| 6774244 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2004-08-10 |
| 6765093 | Couplers for use in oxidative hair dyeing | Yuh-Guo Pan, James S. Anderson | 2004-07-20 |
| 6750355 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2004-06-15 |
| 6750337 | Couplers for use in oxidative hair dyeing | Yuh-Guo Pan, Gottfried Wenke | 2004-06-15 |
| 6750339 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2004-06-15 |
| 6703526 | Coupler for use in oxidative hair dyeing | Yuh-Guo Pan, Margaret Popp | 2004-03-09 |
| 6673932 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2004-01-06 |
| 6673966 | Coupler for use in oxidative hair dyeing | Yuh-Guo Pan, James S. Anderson | 2004-01-06 |
| 6673934 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2004-01-06 |