Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6693196 | Couplers for use in oxidative hair dyeing | Yuh-Guo Pan, James S. Anderson | 2004-02-17 |
| 6589295 | Coupler for use in oxidative hair dyeing | Yuh-Guo Pan, Margaret Popp | 2003-07-08 |
| 6562080 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2003-05-13 |
| 6461391 | Primary intermediates for oxidative coloration of hair | Yuh-Guo Pan | 2002-10-08 |
| 5980584 | Substituted p-aminophenol, process of preparation and use in dyeing hair | Linas R. Stasaitis, Yuh-Guo Pan, Michael Wong | 1999-11-09 |
| 5865854 | BIS-(2-4-diaminophenoxy) benzenes and their use as coupling components in oxidative hair coloring compositions and methods | Yuh-Guo Pan, Linas R. Stasaitis | 1999-02-02 |