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:
May. 19, 2009
Filed:
Mar. 20, 2003
Brigitte Hueber, Weiden, DE;
Juergen Achatz, Weidenberg, DE;
Franz Ott, Mitterteich, DE;
Joerg Fechner, Mainz, DE;
Brigitte Hueber, Weiden, DE;
Juergen Achatz, Weidenberg, DE;
Franz Ott, Mitterteich, DE;
Joerg Fechner, Mainz, DE;
Schott AG, Mainz, DE;
Abstract
The lamp bulb for discharge lamps is made from an aluminosilicate glass with a transformation temperature Tg>600° C. The aluminosilicate glass has a composition (in % by weight, based on oxide content) of SiO>55-64; AlO, 13-18; BO, 0-5.5; MgO, 0-7; CaO, 5-14; SrO, 0-8; BaO, 6-17; ZrO, 0-2; TiO, 0-5, but may contain small amounts of CeOand/or FeO, for anti-solarization and fining agents, such as SnO, SbOand/or AsO. The lamp bulbs for the discharge lamps of the invention may include a melted-in molybdenum electrode and/or an electrode feed or they may be free of any internal electrodes. A method for making the lamp bulbs is also described.