Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5674464 | Desulphurization of waste gases | Daniel Van Velzen, Heinrich Langenkamp | 1997-10-07 |
| 5489421 | Process for preparing hydroxylamine from NO.sub.x -containing flue gases | Daniel Van Velzen, Heinrich Langenkamp, Havard Nymoen | 1996-02-06 |