Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7468158 | Corrosion inhibitor for protecting metallic materials in strongly alkaline medium | Lutz Heuer, Helmut Diekmann, Eberhard Zirngiebl | 2008-12-23 |
| 5306477 | Use of wrought and cast materials and welding fillers for making and using hot concentrated sulphuric acid or oleum | Elmar-Manfred Horn | 1994-04-26 |
| 5120496 | Stainless wrought and cast materials and welding additives for structural units exposed to hot, concentrated sulfuric acid | Elmar-Manfred Horn | 1992-06-09 |
| 5051233 | Stainless wrought and cast materials and welding additives for structural units exposed to hot, concentrated sulfuric acid | Elmar-Manfred Horn | 1991-09-24 |