Borosilicate glass for electronic flash lamps
US5182237A · kind A · utility
9Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 17, 1991 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Apr 17, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/093
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A borosilicate glass is described of the composition on oxide basis in % by weight of 50-75 SiO.sub.2, 11-18 B.sub.2 O.sub.3, 1-5 Al.sub.2 O.sub.3, 0-3 Li.sub.2 O, 0-3 Na.sub.2 O, 0-2 K.sub.2 O, 9-22 Cs.sub.2 O, 0-2 ZnO, 0-2 MgO, 0-3 CaO, 0-3 SrO, 0-3 BaO, provided that the sum of the alkali oxides, apart from Cs.sub.2 O, is at most 5 and the sum of the alkaline-earth oxides plus ZnO is at most 6. The glass is especially suitable for the production of electronic flash lamps, which with this glass reach a multiple of the service life of electronic flash lamps made from the conventional glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.