Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4479923 | Production of phosphoric acid and additional products from phosphate ore | Dysart E. Holcomb, Erhart K. Drechsel | 1984-10-30 |
| 4435370 | Preparation of monocalcium phosphate and/or phosphoric acid from phosphate rock | Dysart E. Holcomb, Erhart K. Drechsel | 1984-03-06 |
| 4393030 | Upgrading of phosphate ore | Dysart E. Holcomb | 1983-07-12 |
| 4393032 | Production of phosphoric acid and additional products from phosphate ore | Erhart K. Drechsel, Dysart E. Holcomb | 1983-07-12 |
| 4371512 | Production of alkali metal sulfates | Erhart K. Drechsel | 1983-02-01 |
| 4343781 | Decomposition of 2KCl.CuCl to produce cuprous chloride and potassium chloride | — | 1982-08-10 |
| 4328196 | Production of alkali metal products from alkali metal fluosilicate | Erhart K. Drechsel | 1982-05-04 |
| 4303610 | Test kit for field analysis of plant tissue magnesium and calcium | Carroll O. Phillips | 1981-12-01 |
| 4268492 | Process for production of potassium sulfate and hydrochloric acid | Erhart K. Drechsel | 1981-05-19 |
| 4191734 | Fluoride-free phosphate reactions | Erhart K. Drechsel | 1980-03-04 |