Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9518307 | Method for the production of a refractory filter | Friedhelm Demey, Renate Jahre, Hans Riethmann, Mario Arruda, Antonio Cassara +3 more | 2016-12-13 |
| 8802003 | Method for the production of a refractory filter | Friedhelm Demey, Renate Jahre, Hans Riethmann, Mario Arruda, Antonio Cassara +3 more | 2014-08-12 |
| 5242874 | Process for whitening kaolin | Nilce Ortiz | 1993-09-07 |