Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6007612 | Pigment compositions | Paul Kerwin, David Ross McGregor | 1999-12-28 |
| 4885033 | Pigment compositions based on acetoacetarylide derivatives | Alexander Hamilton | 1989-12-05 |
| 4247337 | Copper phthalocyanine derivatives | Alexander M. Irvine | 1981-01-27 |
| 4199509 | Copper phthalocyanine derivatives | Alexander M. Irvine | 1980-04-22 |