Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4636303 | Beneficiation of dolomitic phosphate ores | — | 1987-01-13 |
| 4565625 | Beneficiation of phosphate ores containing surface activated silica | James R. Lehr | 1986-01-21 |
| T105404 | Beneficiation of phosphate ores containing surface activated silica | James R. Lehr | 1985-05-07 |
| 4486301 | Method of beneficiating high carbonate phosphate ore | James R. Lehr | 1984-12-04 |
| T104304 | Method of beneficiating high carbonate phosphate ore | James R. Lehr | 1984-06-05 |
| 4301003 | Phosphate flotation with dibasic acids | — | 1981-11-17 |
| 4287053 | Beneficiation of high carbonate phosphate ores | James R. Lehr | 1981-09-01 |
| 4282089 | Phosphate flotation with tribasic acids | Dennis G. Brooks | 1981-08-04 |
| T100603 | Beneficiation of high carbonate phosphate ores | James R. Lehr | 1981-05-05 |
| T100302 | Phosphate flotation with tribasic acids | Dennis G. Brooks | 1981-02-03 |
| T100301 | Phosphate flotation with dibasic acids | — | 1981-02-03 |