Grey glass compositions of the silica-soda-lime type
US6764973B2 · kind B2 · utility
5Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Aug 9, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C4/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention concerns a grey glass composition of the soda-lime type having a global light transmission under an illuminant A (TLA) more than 15% for a glass thickness equal to 4.85 mm, said composition comprising colouring agents as follows in the following weight percentage limits: Fe2O3: 0.25-0.65%, preferably 0.3-0.6% and more preferably still 0.3-0.4%; CoO: 150-250 ppm and preferably>185 ppm; NiO: 650-1000 ppm; Se<5 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.