| PATENT ASSIGNEE'S COUNTRY | Japan |
| UPDATE | 08.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Film contg 0.05 - 0.5 % of fine particles comprising silica, Na oxide & another inorg. oxide satisfying following expression: - S > 10,000(Dp x SG); S = specific surface area; Dp = avera ge diam. (nm) & SG = true specific gravity |
| PATENT PHOTOCOPY | Available on request |
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