Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4299667 | Process for recovering pure benzene | Helmut Klein | 1981-11-10 |
| 4278505 | Process of recovering an n-hexane product which is free from aromatic compounds | Hans F. Danulat, Helmut Klein, Stephen Lukatsch | 1981-07-14 |