Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810390 | Separation and purification of pigment suspensions and suspensions of pigment intermediates by a membrane separation process | Klaus Flierl, Heinz Pfenninger | 1989-03-07 |
| 4560480 | Process for converting sparingly soluble salts of anionic dyes and fluorescent brighteners into more soluble salts by means of cation exchange | Roger Lacroix | 1985-12-24 |
| 4439290 | Process for the separation of oil-in-water emulsions by electrolysis | August Zurrer | 1984-03-27 |
| 4271028 | Process for purifying effluents containing proteins | August Zurrer | 1981-06-02 |