Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4931497 | Hydrophilic swellable graft polymers from maleic anhydride-alkylene substrate | Friedrich Engelhardt | 1990-06-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4931497 | Hydrophilic swellable graft polymers from maleic anhydride-alkylene substrate | Friedrich Engelhardt | 1990-06-05 |