Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4968490 | Spheroidal alkali metal polyphosphates of low apparent density, and apparatus for making them | Werner Kowalski, Hans Haas, Theo Dahmen | 1990-11-06 |
| 4721608 | Spheroidal alkali metal polyphosphates of low apparent density, and process for making them | Werner Kowalski, Hans Haas, Theo Dahmen | 1988-01-26 |
| 4717557 | Spheroidal alkali metal polyphosphates of low apparent density, and process for making them | Werner Kowalski, Hans Haas, Theo Dahmen | 1988-01-05 |
| 4399114 | Process for the dearsenification of polyphosphoric acid | Alexander Maurer, Gero Heymer | 1983-08-16 |