Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4777027 | Continuous process for preparing phosphoric acid and calcium sulphate | Francis A. Thirion | 1988-10-11 |
| 4752390 | Rotary vacuum filters with a horizontal filtration plane | Georges Martin | 1988-06-21 |
| 4588570 | Method for the preparation of phosphoric acid and calcium sulphate | Andre R. Dubreuco, Francis A. Thirion | 1986-05-13 |
| 4330404 | Multiple cell filter with baffles | — | 1982-05-18 |
| 4298583 | Process for manufacturing phosphoric acid | Samuel V. Houghtaling | 1981-11-03 |
| 4252775 | Process for treatment of residues from ferriferous zinc ores | Wilhem E. Pavonet, Renaud F. Quatpers | 1981-02-24 |