Ultraviolet absorbing green tinted glass
US6551953B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1996 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Jun 18, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C4/085
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a green tinted, ultraviolet absorbing, soda lime silica glass having a luminous transmittance of at least 70 percent and ultraviolet transmittance of no more than 38 percent at thickness ranging from 0.154 to 0.189 inches (3.9 to 4.9 mm). These properties are achieved in the present invention by using a colorant portion that is either (a) greater than 0.6 percent by weight total iron (expressed as Fe2O3) with a redox (FeO/total iron) of from 0.275 to less than 0.35 or (b) from greater than 0.6 to 0.85 percent by weight total iron with a redox of less than 0.35. It is preferred that the glass have a dominant wavelength of 495 to 535 nanometers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.