Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7931883 | Silicon feedstock for solar cells | Kenneth Friestad, Ragnar Tronstad, Cyrus Zahedi, Christian Dethloff | 2011-04-26 |
| 7918916 | Calcium-silicate based slag for treatment of molten steel | Gabriella Maria Tranell, Ragnar Tronstad | 2011-04-05 |
| 7879130 | Calcium-silicate based slag for treatment of molten silicon | Gabriella Maria Tranell, Ragnar Tronstrad | 2011-02-01 |