Romberger; Karl A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Romberger; Karl A..The latest application filed is for "recovery of metal values and hydrofluoric acid from tantalum and columbium waste sludge".
- Romberger; Karl A. - Gilbertsville PA
| Patent | Date |
|---|---|
| Recovery of metal values and hydrofluoric acid from tantalum and columbium waste sludge Grant 5,023,059 - Bielecki , et al. June 11, 1 | 1991-06-11 |
| Process for dissolving tantalum/columbium materials containing alkali metal impurities Grant 4,663,130 - Bergman , et al. May 5, 1 | 1987-05-05 |
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