Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4757770 | Condensate sand collection system | David C. Hitchcock, Henry Epstein | 1988-07-19 |
| 4757772 | Sand collection system | David C. Hitchcock, Henry Epstein | 1988-07-19 |
| 4686031 | Beneficiation of gallium in fly ash | David C. Hitchcock | 1987-08-11 |
| 4678647 | Process for the recovery of gallium and germanium from coal fly ash | David C. Hitchcock, Henry Epstein | 1987-07-07 |
| 4643110 | Direct fuel-fired furnace arrangement for the recovery of gallium and germanium from coal fly ash | David C. Hitchcock, Henry Epstein | 1987-02-17 |
| 4567026 | Method for extraction of iron aluminum and titanium from coal ash | — | 1986-01-28 |