Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6494949 | Process for the preparation of beta-phase quinacridone | Kathleen Marie Kozak, George H. Robertson, Terrence R. Chamberlain | 2002-12-17 |
| 6464773 | Toluene sulfonic acid swelling of perylene pigments | George H. Robertson, Chris M. Arizo | 2002-10-15 |
| 6402829 | Process for preparing a substantially pure gamma phase quinacridone pigment of large particle size | George H. Robertson, Humberto Velasquez | 2002-06-11 |