Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5968288 | Method for the preparation of a soldering flux | Wilfried Becher, Karl Hellberg | 1999-10-19 |
| 4694112 | Process for producing 2,2,2-trifluoroethanol | Wilhelm Pohlmeyer, Werner Rudolph | 1987-09-15 |
| 4428920 | Process of producing potassium tetrafluoro aluminate | Karl Hellberg, Heinz Zschiesche | 1984-01-31 |