Issued Patents 2018
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10093807 | Stable yellow imidazolium compounds | Guiru Zhang, Garry Steven Garrett | 2018-10-09 |
| 10034823 | Method of coloring hair with washfast blue imidazolium direct dye compounds | Guiru Zhang, Jielu Zhao | 2018-07-31 |
| 9982138 | Hair color compositions comprising stable violet-blue to blue imidazolium dyes | Guiru Zhang, Jielu Zhao | 2018-05-29 |
| 9943472 | Acid perspiration resistant fluorescent compounds for treating hair | Guiru Zhang | 2018-04-17 |
| 9918919 | Method of coloring hair with washfast yellow imidazolium direct dye compounds | Guiru Zhang, Garry Steven Garrett | 2018-03-20 |
| 9913791 | Method for improving acid perspiration resistance of fluorescent compounds on hair | Guiru Zhang | 2018-03-13 |
| 9872823 | Method for improving fastness properties of fluorescent compounds on hair | Guiru Zhang | 2018-01-23 |
| 9855202 | Compositions for dyeing hair with cationic direct dyes | Guiru Zhang, Peter Marte Torgerson | 2018-01-02 |