The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2015
Filed:
Dec. 05, 2012
Thilo Zachau, Bensheim, DE;
Friedrich Siebers, Nierstein, DE;
Ulrich Schiffner, Mainz, DE;
Kurt Schaupert, Hofheim, DE;
Thilo Zachau, Bensheim, DE;
Friedrich Siebers, Nierstein, DE;
Ulrich Schiffner, Mainz, DE;
Kurt Schaupert, Hofheim, DE;
SCHOTT AG, Mainz, DE;
Abstract
The process for producing a transparent lithium aluminosilicate glass ceramic plate includes ceramicizing a green glass body of the LiO—AlO—SiOsystem using a ceramization program, which includes heating it, for the purpose of nucleation, to a temperature of 750° C.±20° C. and maintaining the temperature for 20±15 minutes, further heating the green glass body, for the purpose of ceramization, to a temperature of 900±20° C. and maintaining the to temperature for 20±15 minutes and then cooling to room temperature. The transparent plate has a thermal expansion coefficient (CTE) from −0.15×10/K to +0.15×10/K at 30 to 700° C. and a brightness value observed at an angle of 2° of ≧80 for a 4-mm thick plate for transmitted normal light.