Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5023059 | Recovery of metal values and hydrofluoric acid from tantalum and columbium waste sludge | Edwin J. Bielecki, Bart F. Bakke, Martin A. Hobin, Charles R. Clark | 1991-06-11 |
| 4663130 | Process for dissolving tantalum/columbium materials containing alkali metal impurities | Roger M. Bergman, Edwin J. Bielecki, Brian J. Higgins | 1987-05-05 |