Patent · US Expired

Alkaline-earth aluminosilicate glass, containing CA and BA, suitable for use in lamp bulbs, and a lamp bulb containing same

US6989633B2 · kind B2 · utility

5Cited by

7References

20Claims

0Family size

Assignee

Schott AG · DE

Inventors

Christian Kunert · Wiesbaden, DE
Karin Naumann · Ober-Olm, DE
Franz Ott · Mitterteich, DE
Ottmar Becker · Langen, DE

Key dates

Filing date	Feb 3, 2003
Grant date	Jan 24, 2006
Priority date	—
Expiry date	Jul 12, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/302
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An alkaline-earth aluminosilicate glass having a composition (in % by weight, based on oxide) of SiO2>55-64; Al2O3 13-18; B2O3 0-5.5; M5O 0-7; CaO 5.5-14; SrO 0-8; BaO 6-17; ZrO2 0-2; CeO2 0-0.3; TiO2 0-0.5; CoO 0.01-0.035; Fe2O3 0.005-0.05; and NiO 0-0.03 is suitable for use in lamp bulbs

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.