Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4968490 | Spheroidal alkali metal polyphosphates of low apparent density, and apparatus for making them | Werner Kowalski, Hans Haas, Markus Erpenbach | 1990-11-06 |
| 4800055 | Process for making a granular product containing sodium triphosphate | Helmut Klee, Hans Haas, Werner Kowalski | 1989-01-24 |
| 4777025 | Process for making phosphorus pentoxide of diminished reactivity | Werner Kowalski, Hans Haas, Gunther Schimmel | 1988-10-11 |
| 4721608 | Spheroidal alkali metal polyphosphates of low apparent density, and process for making them | Werner Kowalski, Hans Haas, Markus Erpenbach | 1988-01-26 |
| 4717557 | Spheroidal alkali metal polyphosphates of low apparent density, and process for making them | Werner Kowalski, Hans Haas, Markus Erpenbach | 1988-01-05 |
| 4219533 | Apparatus for the production of hexagonal phosphorus pentoxide | Gerhard Hartlapp, Werner Kowalski, Robert Queck | 1980-08-26 |