Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4571261 | Method for recovering lead from waste lead products | Kurt J. A. Buren, Martin Hedlund | 1986-02-18 |
| 4512798 | Method for producing lead from sulphidic and oxidic and/or sulphatic lead raw materials | Johan S. Leirnes, Martin Hedlund, Kurt J. A. Buren | 1985-04-23 |
| 4508565 | Method for producing lead from oxidic lead raw materials which contain sulphur | Johan S. Leirnes, Martin Hedlund, Kurt J. A. Buren | 1985-04-02 |
| 4415360 | Method for working-up metal-containing waste products | Johan S. Leirnes | 1983-11-15 |