IR and UV absorbing brown solar glasses, ophthalmic lenses
US6255238A · kind A · utility
10Cited by
7References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2000 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Feb 7, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S501/905
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The object of the present invention is brown solar glasses, absorbing UV or IR radiation, as well as solar ophthalmic lenses in said glasses. Said glasses have the following composition, expressed in percentages by weight: SiO.sub.2 : 64-71; B.sub.2 O.sub.3 : 2-8; Al.sub.2 O.sub.3 : 0-4; ZrO.sub.2 : 0-2; Li.sub.2 O: 0-4; Na.sub.2 O: 6-10; K.sub.2 O: 7-16; CaO: 0-5.5; ZnO: 0-5.5; TiO.sub.2 ; 0-2; Fe.sub.2 O.sub.3 : 3-9; Co.sub.3 O.sub.4 : 0-0.030; NiO: 0-0.2; SeO.sub.2 : 0.0030-0.1; As.sub.2 O.sub.3 : 0-0.1; Sb.sub.2 O.sub.3 : 0-0.1; SnO.sub.2 : 0-0.1; Cl: 0-2; Br: 0-2; F: 0-2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.