Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4753979 | Substituted piperazinone light stabilizers | Roger F. Malherbe, Roland A. E. Winter | 1988-06-28 |
| 4650870 | Substituted piperazinone light stabilizers | Roger F. Malherbe, Roland A. E. Winter | 1987-03-17 |