Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880441 | Asymmetric gas separation membranes having graded density skins | Alfred K. Fritzsche, Milton K. Murphy, Alan Handerman, Clint A. Cruse, Raymond F. Malon | 1989-11-14 |
| 4871494 | Process for forming asymmetric gas separation membranes having graded density skins | Alfred K. Fritzsche, Milton K. Murphy, Alan C. Handermann, Clint A. Cruse, Raymond F. Malon | 1989-10-03 |