The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2007
Filed:
Mar. 05, 2003
Lars Menzel, Berlin, DE;
Dietmar Ehrlichmann, Berlin, DE;
Thomas Mehr, Dollnstein, DE;
Stephen Berndanner, Ellingen, DE;
Wolfgang Spielmann, Ehrwald, AT;
Gerhard Leichtfried, Reutte/Tirol, AT;
Lars Menzel, Berlin, DE;
Dietmar Ehrlichmann, Berlin, DE;
Thomas Mehr, Dollnstein, DE;
Stephen Berndanner, Ellingen, DE;
Wolfgang Spielmann, Ehrwald, AT;
Gerhard Leichtfried, Reutte/Tirol, AT;
Abstract
A short arc high-pressure discharge lamp () for dc operation, includes a discharge vessel () that has two necks () diametrically opposite each other, in which an anode () and a cathode () made of tungsten are melted in a gastight manner, and which has a filling made of at least one noble gas and possibly mercury. According to the invention, at least the material of the cathode tip () contains lanthanum oxide LaOand at least another oxide from the group consisting of hafnium oxide HfOand zirconium oxide ZrOin addition to the abovementioned tungsten.