Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4954168 | Reclaiming of aluminum-chromium waste materials from etching operations | Ranko Crnojevich, Andrew Case | 1990-09-04 |
| 4670229 | Cyclic process for recovering metal values and alumina from spent catalysts | Luther R. Tinnin, Ranko Crnojevich | 1987-06-02 |
| 4666685 | Selective extraction of molybdenum and vanadium from spent catalysts by oxidative leaching with sodium aluminate and caustic | — | 1987-05-19 |
| 4544541 | Removal of hexavalent selenium from nickel, cobalt or copper sulfate solution | Eddie C. Chou, Ben W. Wiegers, Dale K. Huggins | 1985-10-01 |
| 4497659 | Production of metals with low selenium contents | Ranko Crnojevich, Peter H. Yu | 1985-02-05 |
| 4214900 | Production of nonferrous metals with low selenium contents | Ranko Crnojevich, Peter H. Yu | 1980-07-29 |