Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886595 | Process of froth flotation using a methylene bisxanthate as a collector reagent | Eugenio A. Saphores Wiedmaier, Juan C. Vega de Kuyper, Wladimir A. Mardones Parra | 1989-12-12 |