Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4813974 | Removal of excess halide ions in aqueous liquid formulations of basic dyestuffs | Susan M. Morris, Margaret D. Ellis | 1989-03-21 |
| 4802888 | Dry dyestuff powders with enhanced water solubility | Charles W. Sandefur | 1989-02-07 |