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:
Nov. 18, 2008
Filed:
May. 16, 2003
Arnd Ritz, Heinsberg, DE;
Kai Graβie, Stolberg-Breinig, DE;
Arnd Ritz, Heinsberg, DE;
Kai Graβie, Stolberg-Breinig, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a high-pressure gas discharge lamp which comprises at least a lamp bulb () hermetically enclosing a discharge space () filled with a gas, a functional layer (), and a light emission opening (), the latter two being arranged on the outer surface of the lamp bulb, wherein a second layer () covers further regions of the surface of the lamp bulb which do not serve the purpose of the functional layer, while the lamp can be operated at a power such that, given the power level of the lamp, a devitrification of the lamp bulb () and a condensation of the gas are substantially prevented.