| PATENT ASSIGNEE'S COUNTRY | France |
| UPDATE | 11.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Colored glass compn comprising oxides - SiO2 (64-75%) - Alumina (< 5%) - Boria (< 5%) - CaO (5-15%) - MgO (< 5%) - Na2O (10-18 %) - K2O (< 5%) & as coloring agents - Fe2O3 (total Fe) (0.45-2.5%) - With FeO content (16-55% rel. to total Fe as Fe2O3 - CoO (0.001-0.02%) - Se (< 0.0009 %) Wherein glasses have total energy transmission factor (Te) < than light transmission factor under illuminant A (TLa), the factor Te being 10-48 % & TLa 20-60 % for 3.85 mm thickness, said compn having an excitation purity < 7.6 % ) |
| PATENT PHOTOCOPY | Available on request |
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