Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851037 | Collecting agents for the selective flotation of lead and zinc ores and a process for preparing the same | Giorgio Bornengo, Filippo M. Carlini, Anna Marabini | 1989-07-25 |