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:
Apr. 13, 2010
Filed:
Jul. 11, 2003
Engelbertus Cornelius Petrus Maria Vossen, Eindhoven, NL;
Cornelia Titia Staats, Eindhoven, NL;
Leonie Maria Geerdinck, Eindhoven, NL;
Esther DE Beer, Eindhoven, NL;
Ingrid Jozef Maria Snijkers-hendrickx, Eindhoven, NL;
Engelbertus Cornelius Petrus Maria Vossen, Eindhoven, NL;
Cornelia Titia Staats, Eindhoven, NL;
Leonie Maria Geerdinck, Eindhoven, NL;
Esther De Beer, Eindhoven, NL;
Ingrid Jozef Maria Snijkers-Hendrickx, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A low-pressure mercury vapor discharge lamp () has a discharge vessel () enclosing, in a gastight manner, a discharge space provided with a filling of mercury and a rare gas. The discharge vessel () comprises means for maintaining an electric discharge in the discharge space. A portion of the surface () of the discharge vessel () facing the discharge space is provided with a protective layer () comprising yttrium oxide or aluminum oxide and further comprises a borate and/or a phosphate of an alkaline earth metal and/or of scandium, yttrium, or a further rare earth metal. Preferably, the alkaline earth metal is calcium, strontium, and/or barium. Preferably, the further rare earth metal is lanthanum, cerium, and/or gadolinium. The lamp according to the invention has a comparatively low mercury consumption.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile