Cooking device with a glass-ceramic panel providing a cooking surface in a variety of different colors and method of making same

US7380415B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Monica Cotlear De Witzmann · Nieder-Olm, DE
• Angelina Milanovska · Mainz, DE
• Daniela Petto · Mainz, DE
• Dietmar Wennemann · Albig, DE
• Dieter Schoenig · Mainz, DE
• Friedrich Siebers · Nierstein, DE

Key dates

• Filing date: Aug 6, 2004
• Grant date: Jun 3, 2008
• Expiry date: Jun 7, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C17/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The glass ceramic panels are non-transparent and have at least one decoration. In order to fulfill the requirements for a glass ceramic panel that provides a cooking surface for a cooking unit in a variety of different pleasing colors, especially a creamy white color shade (BISQUE), in an economical manner, the glass ceramic panel has a predominant crystalline phase of keatite mixed crystals and a full-surface decorative coating that covers at least 80 percent of the upper smooth surface of the glass ceramic substrate. The full-surface decorative coating is provided in a different color from,the glass ceramic panel. Methods for making these glass ceramic panels are described.