Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4629617 | Method for the preparation of hydrogen sulfide | Karl G. Voigt, Friedrich Bittner, Peter Kleinschmit | 1986-12-16 |
| 4435378 | Process for removing extractable substances from carbon black | Gerhard Kuhner, Manfred Voll, Peter Kleinschmit | 1984-03-06 |
| 4366138 | Carbon black useful for pigment for black lacquers | Edith Eisenmenger, Richard Engel, Gerhard Kuhner, Hans Schaefer, Manfred Voll | 1982-12-28 |