Powder for disks
US7201639B2 · kind B2 · utility
1Cited by
14References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2001 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Sep 27, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2457
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A plurality of disks include a first disk and a second disk stacked upon the first disk. The first disk and the second disk are each formed from glass or glass-ceramic. A powder is disposed between the first disk and the second disk. The powder is selected from the group including calcium carbonate, calcium magnesium carbonate, calcium phosphate, magnesium carbonate, magnesium borate, magnesium oxide, magnesium phosphate, and clay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.