Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4902343 | Hydrometallurgical process for the treatment of sulphidized compounds containing lead | Jean-Michel Demarthe | 1990-02-20 |
| 4297183 | Process for the treatment of solutions of lead chloride | — | 1981-10-27 |
| 4288304 | Hydrometallurgical process for treatment of sulphur ores | Jean-Michel Demarthe, Louis Gandon | 1981-09-08 |
| 4230487 | Method of selectively bringing into solution the non-ferrous metals contained in sulphurized ores and concentrates | Jean-Michel Demarthe, Louis Gandon | 1980-10-28 |