Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4253963 | Asymmetrical ultrafiltration membrane on the basis of cellulose triacetate | Walter Franken, Horst Perl, Ludwig Weickhardt | 1981-03-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4253963 | Asymmetrical ultrafiltration membrane on the basis of cellulose triacetate | Walter Franken, Horst Perl, Ludwig Weickhardt | 1981-03-03 |