Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883586 | Process for beneficiating ores containing fine particles | Samuel M. Polinsky, Roger B. Humberger | 1989-11-28 |
| 4877594 | Purification of phosphoric acid | Michael L. Lopez, James E. Perkins | 1989-10-31 |
| 4836854 | Stabilization of setting times of phosphate-bonded magnesia cements | Samuel M. Polinsky | 1989-06-06 |
| 4816241 | Gaseous reduction of phosphoric acid | Samual M. Polinsky | 1989-03-28 |