Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695554 | Foundry sand additives and method of casting metal, comprising a humic acid-containing ore and in-situ activated carbon or graphite for reduced VOC emissions | — | 1997-12-09 |
| 5688313 | Activated carbon foundry sand additives and method of casting metal for reduced VOC emissions | — | 1997-11-18 |