High refractive index glass beads for high retroreflectivity surfaces
US7045475B2 · kind B2 · utility
6Cited by
39References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2004 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Apr 28, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Glass formulations, and a method of converting such glass formulations to glass beads having a refractive index of at least 1.59 and a high level of retroreflectivity, are provided. The methods and formulations provide beads also having high levels of resistance to degradation by environmental exposure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.