Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4767506 | Electrostatic treatment of milled crude potash salts containing kieserite | — | 1988-08-30 |
| 4570861 | Method of and arrangement for electrostatic separation of paper- and synthetic plastic material-containing mixtures | Helmut Zentgraf | 1986-02-18 |
| 4569432 | Arrangement for feeding of a fine-particle material to electrostatic free-fall cutter | Helmut Zentgraf, Iring Geisler, Heinrich Balzer, Hans Burghardt, Fritz Maikranz | 1986-02-11 |
| 4557827 | Electrostatic free-fall separator with feeding arrangement | Iring Geisler, Helmut Zentgraf | 1985-12-10 |
| 4297207 | Process and apparatus for the electrostatic dressing of carnallite-containing crude potassium salts | Arno Singewald, Irving Geisler, Rudolf Knappe | 1981-10-27 |
| 4276154 | Process for the electrostatic separation of crude potash salts | Arno Singewald, Ulrich Neitzel, Iring Geisler | 1981-06-30 |