Patents by Inventor Wolfgang Zettl

Wolfgang Zettl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Glass composition formulated for a glass-metal bond of a tube collector and glass-metal bond made with glass of said glass composition
    Patent number: 8178451
    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: SiO2, 73-77 wt. %; B2O3, 6-<8 wt. %; Al2O3, 6-6.5 wt. %; Na2O, 5.5-7 wt. %; K2O, 1-3 wt. %; CaO, 0.5-3.2 wt. %; MgO, 0-2 wt. %; Fe2O3, 50-150 ppm; and TiO2 0-<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.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: May 15, 2012
    Assignee: Schott AG
    Inventors: Erhard Dick, Johann Collignon, Wolfgang Zettl, Stephan Tratzky
  • Glass composition formulated for a glass-metal bond of a tube collector and glass-metal bond made with glass of said glass composition
    Publication number: 20100069221
    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: SiO2, 73-77 wt. %; B2O3, 6-<8 wt. %; Al2O3, 6-6.5 wt. %; Na2O, 5.5-7 wt. %; K2O, 1-3 wt. %; CaO, 0.5-3.2 wt. %; MgO, 0-2 wt. %; Fe2O3, 50-150 ppm; and TiO2 0-<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.
    Type: Application
    Filed: September 11, 2009
    Publication date: March 18, 2010
    Inventors: Erhard Dick, Johann Collignon, Wolfgang Zettl, Stephan Tratzky