Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4767585 | Process for producing molded bodies from granular material of silicon, germanium or mixed crystals of these elements | Claus Holm, Erhard Sirtl, Franz Holzlwimmer | 1988-08-30 |
| 4588571 | Process for the purification of silicon by the action of an acid | Erich Bildl, Rolf Baueregger, Dieter Seifert | 1986-05-13 |
| 4515600 | Process for the removal of the slag portion from molten mixtures of slag and silicon using a semipermeable separating wall | Jorg Kotilge | 1985-05-07 |
| 4457903 | Semicontinuous process for the production of pure silicon | Claus Holm, Jorg Kotilge, Michael Wohlschlager | 1984-07-03 |
| 4366024 | Process for making solar cell base material | Gerhard Ast, Dieter Helmreich, Hans-Dieter Miller, Erhard Sirtl | 1982-12-28 |
| 4312850 | Semicontinuous process for the manufacture of pure silicon | Claus Holm, Erhard Sirtl | 1982-01-26 |
| 4308245 | Method of purifying metallurgical-grade silicon | Claus Holm | 1981-12-29 |
| 4304763 | Process for purifying metallurgical-grade silicon | Michael Wohlschlager | 1981-12-08 |
| 4234630 | Process for the protection of carbon bodies | Michael Wohlschlager | 1980-11-18 |