Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7429343 | Process for producing polyolefin membrane with integrally asymmetrical structure | Erich Kessler, Friedbert Wechs, Frank Wiese | 2008-09-30 |
| 6497752 | Integrally asymmetrical polyolefin membrane | Erich Kessler, Friedbert Wechs, Frank Wiese | 2002-12-24 |
| 6375876 | Method for producing an integrally asymmetrical polyolefin membrane | Erich Kessler, Friedbert Wechs, Frank Wiese | 2002-04-23 |