Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859770 | Process for making alpha-phase phthalocyanine blue pigment comprising substantially 100 percent isometric crystals | Thomas E. Donegan, Arvind S. Patil | 1989-08-22 |
| 4853039 | Process for making a phthalocyanine pigment dispersion | Thomas E. Donegan, John H. Bantjes | 1989-08-01 |