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. 15, 2012
Filed:
Sep. 11, 2009
Erhard Dick, Pechbrunn, DE;
Johann Collignon, Tirschenreuth, DE;
Wolfgang Zettl, Mitterteich, DE;
Stephan Tratzky, Neustadt/Wn, DE;
Erhard Dick, Pechbrunn, DE;
Johann Collignon, Tirschenreuth, DE;
Wolfgang Zettl, Mitterteich, DE;
Stephan Tratzky, Neustadt/Wn, DE;
Schott AG, Mainz, DE;
Abstract
The glass-metal bond for a tube collector includes a glass tube and metal part bonded to the glass tube. In order to match the thermal expansion properties, the glass tube has the following composition: SiO, 73-77 wt. %; BO, 6-<8 wt. %; AlO, 6-6.5 wt. %; NaO, 5.5-7 wt. %; KO, 1-3 wt. %; CaO, 0.5-3.2 wt. %; MgO, 0-2 wt. %; FeO, 50-150 ppm; and TiO0-<100 ppm. The ratio of the sum of the alkaline-earth metal oxides (in mol %) to the sum of the alkali metal oxides (in mol %) is ≦0.6. The metal part is preferably made of metal material no. 1.3981 according to DIN 17745. The glass composition itself is also part of the invention.