Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4968490 | Spheroidal alkali metal polyphosphates of low apparent density, and apparatus for making them | Hans Haas, Theo Dahmen, Markus Erpenbach | 1990-11-06 |
| 4800055 | Process for making a granular product containing sodium triphosphate | Helmut Klee, Hans Haas, Theo Dahmen | 1989-01-24 |
| 4777025 | Process for making phosphorus pentoxide of diminished reactivity | Theo Dahmen, Hans Haas, Gunther Schimmel | 1988-10-11 |
| 4721608 | Spheroidal alkali metal polyphosphates of low apparent density, and process for making them | Hans Haas, Theo Dahmen, Markus Erpenbach | 1988-01-26 |
| 4717557 | Spheroidal alkali metal polyphosphates of low apparent density, and process for making them | Hans Haas, Theo Dahmen, Markus Erpenbach | 1988-01-05 |
| 4705529 | Process for reducing the reactivity and improving the flow behavior of phosphorus pentoxide | Gunther Schimmel, Gero Heymer, Reinhard Gradl | 1987-11-10 |
| 4534946 | Process for making alkali metal polyphosphates | Ben Damman, Hans Scheffer, Paul de Witte, Johannes Krause, Hans Haas | 1985-08-13 |
| 4454054 | Sodium tripolyphosphate, process for making it, and its use | Herbert Landgraber, Johan Scheffer, Hans Haas | 1984-06-12 |
| 4391783 | Process for making abrasion-resistant sodium tripolyphosphate | Hans Haas | 1983-07-05 |
| 4219533 | Apparatus for the production of hexagonal phosphorus pentoxide | Gerhard Hartlapp, Robert Queck, Theo Dahmen | 1980-08-26 |