Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4961914 | Method of preparing hydrogen cyanide | Michael Witzel, Peter Kleinschmit, Carl Voigt, Peter Albers | 1990-10-09 |
| 4853190 | Process & apparatus for the production of hydrogen cyanide | Reinhard Manner, Hans Schaefer, Carl Voight | 1989-08-01 |
| 4594234 | Process and apparatus for the production of hydrogen cyanide | Reinhard Manner, Hans Schaefer, Carl Voigt | 1986-06-10 |
| 4345072 | Process for the production of 5-arylidene hydantoins (B) | Axel Kleemann, Theodor Lussling, Paul Scherberich | 1982-08-17 |