Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4755226 | Sealing and/or stabilizing and/or binding preparations comprising alkali metal silicate solutions | Wolfgang Friedemann, Wolfgang Pesch | 1988-07-05 |
| 4541869 | Process for forming foundry components | Norbert Maak, Wolfgang Friedemann, Hans Fehr | 1985-09-17 |
| 4341559 | Binders based upon solutions of alkali metal silicates | Wolfgang Friedemann, Norbert Maak | 1982-07-27 |