Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879044 | Highly aromatic anisotropic polyurea/urethane membranes and their use for the separation of aromatics from non aromatics | Joseph L. Feimer, Bernd A. Koenitzer | 1989-11-07 |
| 4861628 | Thin film composite membrane prepared by suspension deposition | — | 1989-08-29 |
| 4837054 | Thin film composite membrane prepared by deposition from a solution | — | 1989-06-06 |
| 4828773 | Highly aromatic anisotropic polyurea/urethane membranes and their use for the separation of aromatics from non-aromatics | Joseph L. Feimer, Bernd A. Koenitzer | 1989-05-09 |