Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871466 | Novel collectors and processes for making and using same | D. R. Nagaraj | 1989-10-03 |
| RE32827 | Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors | Yun Fu | 1989-01-10 |