Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871494 | Process for forming asymmetric gas separation membranes having graded density skins | Robert E. Kesting, Alfred K. Fritzsche, Milton K. Murphy, Clint A. Cruse, Raymond F. Malon | 1989-10-03 |