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:
Nov. 28, 2006
Filed:
Dec. 27, 2004
Friedrich Siebers, Nierstein, DE;
Peter Nass, Mainz, DE;
Gerhard Lautenschläger, Jena, DE;
Otmar Becker, Langen, DE;
Friedrich Siebers, Nierstein, DE;
Peter Nass, Mainz, DE;
Gerhard Lautenschläger, Jena, DE;
Otmar Becker, Langen, DE;
Schott Glas, Mainz, DE;
Abstract
This invention relates to a flat float glass that can be prestressed or transformed into a glass ceramic with high quartz mixed crystals or keatite mixed crystals. To eliminate undesirable surface defects during floating and to achieve superior characteristics of the glass or of the glass ceramic, in particular with regard to a low coefficient of thermal expansion and high light transmittance, the glass has a concentration of less than 300 ppb Pt, less than 30 ppb Rh, less than 1.5 wt. % ZnO and less than 1 wt. % SnO, and is refined during melting without the use of the conventional fining agents arsenic oxide and/or antimony oxide.