Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859642 | Fixed-bed catalyst structure obtained using honeycomb elements | Wolfgang Hoelderich, Michael Kroener, Werner Biffar | 1989-08-22 |
| 4374730 | Process and apparatus for the biological purification of sewage | Alexandru Braha, Hans Daucher, Klaus Hess, Helmut Merkel, Roland Roedl +2 more | 1983-02-22 |
| 4269609 | Isolating fluorine compounds from the vapors obtained when evaporatively concentrating phosphoric acid | Andreas Brunold, Lothar Diehl | 1981-05-26 |