Glass beads and uses thereof
US6800574B2 · kind B2 · utility
17Cited by
12References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2001 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Jul 11, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C23/0005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In one aspect, the invention provides glass beads and optical devices comprising the glass beads. In other aspects, the invention provides methods of making said glass beads and rapid glass screening methods that use glass beads. Glass beads of the invention comprise greater than 80 weight percent silica, active rare earth dopant, and modifying dopant. In another embodiment the glass beads comprise greater than 80 weight percent silica and at least 5 weight percent germania. In another embodiment, glass beads comprise and from about 20 to about 90 anion mole percent of non-oxide anion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.