Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868222 | Preparation of asymmetric membranes by the solvent extraction of polymer components from polymer blends | Ritchie A. Wessling | 1989-09-19 |
| 4859339 | Microporous membranes of syndiotactic vinylaromatic polymers | Ritchie A. Wessling, Alan F. Burmester | 1989-08-22 |