Low solar absorbing blue glass, solar reflecting coated blue glass, and insulating unit having a low solar heat gain
US8268741B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2007 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Aug 12, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B9/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An insulating unit having a neutral grey color and a solar heat gain coefficient less than 0.40 includes a clear glass sheet spaced from a coated glass sheet. The coated glass sheet includes a colored glass substrate having a solar infrared reflective coating. The composition of the coated substrate includes a base glass portion and a glass colorant portion, the glass colorant portion including total iron in the range of 0.04 to less than 0.28 weight percent; CoO in the range of 32 to 90 parts per million, and Se in the range of greater than 0 to less than 5.5 parts per million. In one non-limiting embodiment of the invention the glass substrate at a thickness of 0.223 inches has a* chromaticity coordinates of −3.5 to +2.5 and b* chromaticity coordinates of −1 to −15, and a visible light transmittance of 40 to 80%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.