Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4743438 | Process for producing phosphoric acid from low purity phosphate rock | James R. Lehr | 1988-05-10 |
| T105603 | Process for producing phosphoric acid from low purity phosphate rock | James R. Lehr | 1985-07-02 |