Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5178778 | Apparatus and method for separating immiscible liquid mixtures | Helmut Sachse, Konrad Schembra, Horst Fleischmann | 1993-01-12 |
| 5049200 | Process for the hydrophilizing and/or cement-residue-removing surface treatment of silicon wafers | Roland Brunner, Susanne Bauer-Mayer, Helmut Kirschner | 1991-09-17 |
| 4572729 | Method for producing articles of high-purity synthetic quartz glass | Winfried Lang, Michael Schwab, Werner Zulehner | 1986-02-25 |
| 4525336 | Process for removing impurities from silicon fragments | Michael Peterat | 1985-06-25 |
| 4515762 | Process for processing waste gases resulting during the production of silicon | Franz Koppl, Winfried Lang, Ernst Muhlhofer, Michael Schwab | 1985-05-07 |
| 4454104 | Process for working up the residual gases obtained in the deposition of silicon and in the conversion of silicon tetrachloride | Franz Koppl, Helmut Lorenz, Friedrich Steudten | 1984-06-12 |
| 4311545 | Method for the deposition of pure semiconductor material | Erwin Bugl, Helmut Lorenz, Helmut Hamster, Franz Koppl | 1982-01-19 |