Gem comprised of a glass based on silicon oxide and calcium oxide

US5559061A · kind A · utility

Assignee

• D. Swarovski & Co. · AT

Inventors

• Norbert Bilek · Wattens, AT
• Wolfgang Porcham · Hall in Tirol, AT
• Michael Schlamadinger · Volders, AT
• Gerold Sprachmann · Kolsassberg, AT

Key dates

• Filing date: Nov 14, 1995
• Grant date: Sep 24, 1996
• Expiry date: Nov 14, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C4/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A glass composition substantially comprising silicon oxide, calcium oxide and aluminum oxide, and its use for producing gems.