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:
Jul. 08, 2003
Filed:
Jun. 22, 1999
Joseph F. R. Eijsermans, Eindhoven, NL;
Dorothea Seebode, Aachen, DE;
Angela Jörres, Julich, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The high-pressure discharge lamp comprises a sealed lamp vessel ( ) having a quartz glass wall ( ) enclosing a discharge space ( ). Metal foils ( ) are embedded in the wall, connected to electrode rods ( ) projecting from the wall into the discharge space. The electrode rods ( ) have a first part ( ) and a second part ( ). The second part is made of tungsten with a diameter of 120 to 180 &mgr;m or molybdenum with a diameter of 120 to 350 &mgr;m, or tungsten-molybdenum mixtures with a diameter of 120 to 350 &mgr;m. The second part, which is positioned within the wall ( ), prevents premature failure of the lamp caused by leakage.