Transparent glass microspheres and products made therefrom
US3946130A · kind A · utility
47Cited by
13References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1974 |
| Grant date | Mar 23, 1976 |
| Priority date | — |
| Expiry date | Apr 1, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/252
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Transparent glass microspheres that are based on a ternary system of TiO.sub.2, heavy-metal oxide selected from BaO and CdO, and strong glass-forming oxide selected from SiO.sub.2, P.sub.2 O.sub.5, and GeO.sub.2 are disclosed. The microspheres have improved uniformity in optical properties and in handling properties, whereby retroreflective products of greater retroreflectivity can be made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.