Patent · US Active

High-pressure mercury discharge lamp

US7973476B2 · kind B2 · utility

1Cited by

7References

19Claims

0Family size

Assignee

OSRAM Gesellschaft mit beschraenkter Haftung · DE

Inventors

Rainer Koger · Berlin, DE
Markus Kolodziejczyk · Berlin, DE
Wolfgang Spielmann · Ehrwald, AT

Key dates

Filing date	Dec 17, 2007
Grant date	Jul 5, 2011
Priority date	—
Expiry date	Jul 11, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/86
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a high-pressure mercury discharge lamp for DC operation at a nominal wattage of more than 1.5 kW. Said high-pressure mercury discharge lamp comprises an anode, at least some areas of which are made of a material containing at least some tungsten, said material having a grain number of more than 200 grains per mm2 and a density of more than 19.05 g/cm3.

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