Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883586 | Process for beneficiating ores containing fine particles | Laurence W. Bierman, Roger B. Humberger | 1989-11-28 |
| 4836854 | Stabilization of setting times of phosphate-bonded magnesia cements | Laurence W. Bierman | 1989-06-06 |
| 4747941 | Increased reduction of magnesium content by use of inorganic promoters during beneficiation of phosphate ores by flotation | Laurence W. Bierman, David A. Hempel | 1988-05-31 |
| 4642181 | Increased reduction of magnesium content by use of inorganic promoters during beneficiation of phosphate ores by flotation | Larry W. Bierman, David A. Hempel | 1987-02-10 |
| 4511541 | Process for the recovery of cadmium and other metals from solution | Laurence W. Bierman, David A. Hempel, Roger B. Humberger | 1985-04-16 |