Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5449503 | Process for separating arsenic acid from an aqueous mixture comprising sulfuric and arsenic acids | Charles L. Redmon, Robert A. Smith | 1995-09-12 |
| 5089241 | Process for converting hexafluoroarsenic acid or any salt thereof to arsenic acid or salt thereof which can then be rendered nonhazardous | Robert A. Smith, Douglas G. Frick, Charles L. Redmon | 1992-02-18 |
| 4929435 | Manufacture of high purity low arsenic anhydrous hydrogen fluoride | Barry J. Boghean, Charles L. Redmon, Christian A. Wamser | 1990-05-29 |
| 4244925 | Method for production of alkali metal chromates from chrome ores | Thomas R. Morgan, Douglas G. Frick | 1981-01-13 |