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:
Sep. 21, 2010
Filed:
Nov. 21, 2005
Simon Krijnen, Roosendaal, NL;
Theodorus Herman Ketelaar, Winschoten, NL;
Olaf Mastenbroek, Roosendaal, NL;
Roland Blasig, Kleve, DE;
Simon Krijnen, Roosendaal, NL;
Theodorus Herman Ketelaar, Winschoten, NL;
Olaf Mastenbroek, Roosendaal, NL;
Roland Blasig, Kleve, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A low-pressure mercury vapor discharge lamp has a lamp envelope enclosing, in a gastight manner, a discharge space provided with a filling of mercury and a rare gas. The lamp envelope includes electrodes for maintaining a discharge in the discharge space. The lamp envelope transmits UV-light and is made of a black glass component. The composition of the black glass component is free of PbO and comprises, expressed as a percentage by weight, the following constituents: 65-70% by weight of SiO, 1.4-2.2% by weight of LiO, 1.5-2.5% by weight of NaO, 11-13% by weight of KO, 1.8-2.6% by weight of MgO, 2.5-5% by weight of CaO, 2-3.5% by weight of SrO, 8-9.5% by weight of BaO, 0.2-0.4% by weight of CoO, and 1.7-3.25% by weight of NiO.