Patent · US Expired

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

US6794020B2 · kind B2 · utility

4Cited by

3References

14Claims

0Family size

Assignee

Schott Glas · 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	Sep 7, 2001
Grant date	Sep 21, 2004
Priority date	—
Expiry date	Sep 14, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24926
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

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.

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