Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6403043 | Use of gaseous mixture containing an inert gas and an oxygen containing gas in desulphurization of blister copper during anode refining | Torstein Utigard | 2002-06-11 |
| 5759382 | Injection of powdered material into electrolysis cells | Torstein Utigard, Torbjorn Dahl | 1998-06-02 |
| 5435833 | Process to convert non-ferrous metal such as copper or nickel by oxygen enrichment | — | 1995-07-25 |