Patent ID: 7553786

Claim:
An alumino-silicate glass for lamp bulbs that have molybdenum components, said glass containing alkaline earth metals and having a composition, in % by weight on an oxide basis, of: SiO 2 >58-62 Al 2 O 3 15-17.5 MgO 0.1-<1 CaO 5.5-14 SrO 0-8 BaO 6-17 ZrO 2 0-1 CeO 2 0-0.3 TiO 2 0-5 MoO 3 0-2 Bi 2 O 3 0-4 Σ RO 11.6-29, wherein RO is an alkaline earth metal oxide and said glass does not contain any B 2 O 3 .