| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 02.00 |
| PATENT ASSIGNEE | Amcol International |
| PATENT CLAIMS |
- Disposing solid Cu in vessel - Melting Cu by heating - Covering melted Cu with layer of C sand to reduce oxida tion on upper surface of melted Cu - Removing said layer of C sand from upper surface of melted Cu |
| PATENT PHOTOCOPY | Available on request |
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