US Patent 7205252 Method of making a glass-ceramic article

Patent 7205252 was granted and assigned to Schott AG on April, 2007 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Schott AG

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7205252

Date of Patent

April 17, 2007

Patent Application Number

11124849

Date Filed

May 9, 2005

Patent Citations Received

‌

US Patent 11926555 Crack-resistant glass-ceramic articles and methods for making the same

Patent Primary Examiner

‌

Karl Group

Patent abstract

The method produces a glass-ceramic article substantially in the form of a plate with improved high temperature difference resistance or strength. The glass-ceramic article contains keatite mixed crystals (KMK) or high quartz mixed crystals (HQMK) as well as the keatite mixed crystals (KMK). The method includes heating a glass-ceramic in a high quartz mixed crystal state to form the keatite mixed crystals with a heating rate of 20 K/min to 150 K/min, preferably more than 15 K/min, especially preferably more than 20 K/min. These high heating rates increase the temperature difference resistance.