| PATENT ASSIGNEE'S COUNTRY | Japan |
| UPDATE | 07.99 |
| PATENT ASSIGNEE | Japan Exlan (Osaka) |
| PATENT CLAIMS |
- Fiber contg sulfonic acid groups (> 0.01 milliequiv/gram) - Fine inorganic particles (> 5%) & size < 10 micro-m - |
| PATENT PHOTOCOPY | Available on request |
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