Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4755226 | Sealing and/or stabilizing and/or binding preparations comprising alkali metal silicate solutions | Wolfgang Friedemann, Kurt Feulner | 1988-07-05 |
| 4561898 | Hardener for silicate soil stabilizers | Hans Fehr, Wolfgang Friedemann | 1985-12-31 |
| 4512808 | Binder compositions based on alkali metal silicate solutions | Gunter Beer | 1985-04-23 |
| 4425291 | Method for the production of more water-resistant foamed elements from waterglass containing natural latex dispersion | Gunter Beer, Wolfgang Friedemann, Manfred Küpfer | 1984-01-10 |
| 4264564 | Process for the manufacture of high purity silicic acid | Wolfgang Friedemann, Helmut V. Freyhold, Alfred Koster | 1981-04-28 |