Glass-ceramic cooking panel that makes deposited material, such as dirt, less conspicuous

US6821628B2 · kind B2 · utility

Assignee

• Schott Glas · DE

Inventors

• Bernd Schultheis · Bad Kreuznach, DE
• Waldemar Weinberg · Kiebitzreihe, DE
• Monica Cotlear De Witzmann · Nieder-Olm, DE
• Roland Dudek · Bad Kreuznach, DE
• Friedrich Siebers · Nierstein, DE
• Klaus Schoenberger · Mainz, DE

Key dates

• Filing date: Dec 9, 1999
• Grant date: Nov 23, 2004
• Expiry date: Dec 9, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24926
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The cooking panel is made from an opaque glass-ceramic material uniformly colored throughout and having keatite mixed crystals as the predominant crystalline phase. The cooking panel is made by ceramicizing a ceramicizable glass or a transparent glass-ceramic with high quartz mixed crystals as the predominant crystalline phase in a definite color location range with a brightness parameter value (L*) less than 85 and a color shade and chromaticity according to its later service and wear pattern. The cooking panel makes deposited material, such as dirt and the like, less conspicuous.