Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7258849 | Method for the production of nitric acid | Detlev Claes, Joachim Johanning, Rainer Maurer, Erich Szonn | 2007-08-21 |
| 4877423 | Method and device for cooling flue dust | Horst Mollenhoff | 1989-10-31 |