Issued Patents 2005
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6951574 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2005-10-04 |
| 6916346 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2005-07-12 |
| 6916347 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2005-07-12 |
| 6908493 | Couplers for use in oxidative hair dyeing | Yuh-Guo Pan, James S. Anderson | 2005-06-21 |
| 6887280 | Hair coloring compositions for use in oxidative hair dyeing | Yuh-Guo Pan, Sabina Burdzovic | 2005-05-03 |
| 6861556 | Coupler for use in oxidative hair dyeing | Yuh-Guo Pan | 2005-03-01 |
| 6855174 | Couplers for use in oxidative hair dyeing | Yuh-Guo Pan, Gottfried Wenke | 2005-02-15 |
| 6838561 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2005-01-04 |