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:
Aug. 20, 2002
Filed:
Mar. 24, 2000
Tadashi Muramoto, Mie, JP;
Shinichi Aratani, Mie, JP;
Central Glass Company, Limited, Ube, JP;
Abstract
The invention relates to a lithium-sodium-aluminosilicate glass composition. This glass composition has a softening point of 700° C. or lower; a first temperature (1450° C. or lower) at which the glass composition exhibits a viscosity of 10 poises; a second temperature (1000° C. or lower) at which the glass exhibits a viscosity of 10 poises; and a mean thermal expansion coefficient between 30° C. and a glass transition temperature of the glass composition. This coefficient is within a range of from 90×10 /° C. to 130×10 /° C. The glass composition can be easily formed into a precursor of a glass article by pressing. It is possible to obtain a glass article that is chemically strengthened from the precursor by conducing alkali ion exchange.