Patent · US Expired

Flat float glass

US7141521B2 · kind B2 · utility

19Cited by

3References

20Claims

0Family size

Assignee

Schott Glas · DE

Inventors

Friedrich Siebers · Nierstein, DE
Peter Nass · Mainz, DE
Gerhard Lautenschlager · Reinheim, DE
Otmar Becker · Langen, DE

Key dates

Filing date	Dec 27, 2004
Grant date	Nov 28, 2006
Priority date	—
Expiry date	Jan 9, 2025

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C10/0045
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

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. % SnO2, and is refined during melting without the use of the conventional fining agents arsenic oxide and/or antimony oxide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.