Glass for tungsten-halogen lamps
US4605632A · kind A · utility
8Cited by
4References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1984 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Oct 24, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S501/904
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to the production of transparent, high silica glass envelopes for tungsten-halogen lamps consisting essentially, by weight, of 1-2.5% Al.sub.2 O.sub.3, 0.25-1% CaO, 0.1-0.25 Na.sub.2 O and/or K.sub.2 O, 2.5-3.5% B.sub.2 O.sub.3, 0.15-0.3% F, and the remainder SiO.sub.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.