Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886888 | Extraction of amino an acid from aqueous mixtures thereof | Francis W. Tuominen, Ronald R. Swanson, Kenneth Mackay, Bradley W. Glorvigen | 1989-12-12 |
| 4886889 | Process for recovery of an amino acid from aqueous mixtures thereof | Ronald P. Wirth, Michael J. Virnig, Leroy O. Krbechek | 1989-12-12 |
| 4814007 | Recovery of precious metals | Wilson L. Lin, Michael J. Virnig | 1989-03-21 |