Patent · US Active

Arc tube composed of yttrium aluminum garnet ceramic material

US7884550B2 · kind B2 · utility

0Cited by

7References

9Claims

0Family size

Assignee

General Electric Company · US

Inventors

Gregory Gratson · Ballston Lake, US
James Anthony Brewer · Scotia, US
Venkat Subramaniam Venkataramani · Clifton Park, US
Mohamed Rahmane · Clifton Park, US
Svetlana Selezneva · Schenectady, US
Sairam Sundaram · Guilderland, US

Key dates

Filing date	Nov 7, 2006
Grant date	Feb 8, 2011
Priority date	—
Expiry date	Dec 9, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2235/9653
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A transparent sintered yttrium aluminum garnet ceramic material formed from a solid-state reaction of a mixture of yttrium oxide powder and aluminum oxide powder during sintering. The ceramic material preferably has an in-line transmission of greater than 75% so it may used to fabricate arc tubes for high intensity discharge lamps used in automotive headlamps.

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