Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6242245 | Multicomponent system for modifying, degrading or bleaching lignin or lignin-containing materials, and processes for its use | Manfred Amann, Johannes Freudenreich, Jürgen Stohrer, Elke Fritz-Langhals | 2001-06-05 |
| 4457903 | Semicontinuous process for the production of pure silicon | Josef Dietl, Claus Holm, Jorg Kotilge | 1984-07-03 |
| 4304763 | Process for purifying metallurgical-grade silicon | Josef Dietl | 1981-12-08 |
| 4234630 | Process for the protection of carbon bodies | Josef Dietl | 1980-11-18 |