Dark grey soda-lime glass
US5877103A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1996 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Sep 3, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S501/905
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Soda lime glass includes glass forming constituents for soda lime glass; and coloring agents including iron, cobalt, selenium and chromium express in the form indicated and in an amount as percent by weight of the soda lime glass as follows: PA1 from 1.05 to 1.80% of Fe.sub.2 O.sub.3, PA1 from 0.0040 to 0.0180% of Co, PA1 from 0.0003 to 0.0040% of Se, and PA1 from 0.0010 to 0.0100% of Cr.sub.2 O.sub.3. The soda lime glass has a dark grey color, a total energy transmission measured for a glass thickness of 4mm (TE4) mm (TE4) ranging between 15 to 40%, a selectivity (SE4) which is high and is at least 1.2, and an excitation purity which does not exceed 10%. This glass is particularly suitable for automobile rear windows or rear side windows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.