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. 01, 2008
Filed:
Jun. 18, 2003
Roland Blasig, Aachen, DE;
Simon Krijnen, Eindhoven, DE;
Roland Blasig, Aachen, DE;
Simon Krijnen, Eindhoven, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The electric lamp has a glass component with a composition which, according to the invention, is substantially free of PbO and has the following constituents: 55–70 wt. % SiO, <0.1 weight % AlO, 0.5–4 weight % LiO, 0.5–3 weight % NaO, 10–15 wt. % KO, 0–3 wt. % MgO, 0–4 wt. % CaO, 0.5–5 wt. % SrO, 7–10 wt. % BaO. Preferably, the composition of the glass comprises: 65–70 wt. % SiO, 1.4–2.2 wt. % LiO, 1.5–2.5 wt. % NaO, 11–12.3 wt. % KO, 1.8–2.6 wt. % MgO, 2.5–5 wt. % CaO, 2–3.5 wt. % SrO, 8–9.5 wt. % BaO. The glass is preferably used as a CFL-envelope glass or as glass for a stem. The electric lamp made with a glass according to the invention has favorable fusion and processing properties, in particular a liquidus temperature T≦800° C.