Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4536560 | Polyimides prepared from cyclic dianhydrides | Mark L. Winzenburg, Ellis K. Fields | 1985-08-20 |
| 4490545 | Cyclic dianhydrides prepared from maleic anhydride | Mark L. Winzenburg, Ellis K. Fields | 1984-12-25 |