Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6793905 | Method for producing high-purity hydrochloric acid | Werner Buttner, Martin Hostalek, Ching-Jung Kan | 2004-09-21 |
| 6740302 | Method for producing high-purity sulphuric acid | Martin Hostalek, Werner Buttner, Rolf Hafner, Ching-Jung Kan, Ekkehart Seitz +1 more | 2004-05-25 |