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:
Jul. 19, 2011
Filed:
Aug. 13, 2009
Friedrich Siebers, Nierstein, DE;
Ulrich Schiffner, Mainz, DE;
Wolfgang Schmidbauer, Mainz, DE;
Klaus Schönberger, Mainz, DE;
Petra Grewer, Wiesbaden, DE;
Erich Rodek, Mainz, DE;
Friedrich Siebers, Nierstein, DE;
Ulrich Schiffner, Mainz, DE;
Wolfgang Schmidbauer, Mainz, DE;
Klaus Schönberger, Mainz, DE;
Petra Grewer, Wiesbaden, DE;
Erich Rodek, Mainz, DE;
Schott AG, Mainz, DE;
Abstract
A transparent, colorless lithium-aluminosilicate glass ceramic plate with high-quartz mixed crystals as the prevailing crystal phase, which is provided on one side with an opaque, colored, temperature-stable coating over the entire surface or over the entire surface to a large extent, is described, which has a content of NdOof 40 to 4000 ppm, a Yellowness Index of less than 10% with a 4 mm glass (ceramic) layer thickness, and a variegation of colors of the glass or the glass ceramic in the CIELAB color system of C* of less than 5. The glass ceramic plate preferably has a composition (in % by weight based on oxide) of: LiO 3.0-4.5, NaO 0-1.5, KO 0-1.5, ΣNaO+KO 0.2-2.0, MgO 0-2.0, CaO 0-1.5, SrO 0-1.5, BaO 0-2.5, ZnO 0-2.5, BO0-1.0, AlO19-25, SiO55-69, TiO1-3, ZrO1-2.5, SnO0-0.4, ΣSnO+TiO<3, PO0-3.0, NdO0.01-0.4, CoO 0.0-0.004.