US 12,227,449 B2
Zircon compatible, ion exchangeable glass with high damage resistance
Matthew John Dejneka, Corning, NY (US); Adam James Ellison, Corning, NY (US); and John Christopher Mauro, Boalsburg, PA (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Aug. 11, 2023, as Appl. No. 18/232,968.
Application 18/232,968 is a division of application No. 16/799,451, filed on Feb. 24, 2020, granted, now 11,767,253.
Application 16/799,451 is a continuation of application No. 15/795,844, filed on Oct. 27, 2017, granted, now 10,570,053, issued on Feb. 25, 2020.
Application 15/795,844 is a continuation of application No. 14/591,361, filed on Jan. 7, 2015, granted, now 9,822,032, issued on Nov. 21, 2017.
Application 14/591,361 is a continuation of application No. 13/903,433, filed on May 28, 2013, granted, now 8,951,927, issued on Feb. 10, 2015.
Claims priority of provisional application 61/748,981, filed on Jan. 4, 2013.
Claims priority of provisional application 61/653,489, filed on May 31, 2012.
Prior Publication US 2023/0382782 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 3/093 (2006.01); C03C 3/083 (2006.01); C03C 3/085 (2006.01); C03C 3/087 (2006.01); C03C 3/091 (2006.01); C03C 4/18 (2006.01); C03C 21/00 (2006.01)
CPC C03C 3/093 (2013.01) [C03C 3/083 (2013.01); C03C 3/085 (2013.01); C03C 3/087 (2013.01); C03C 3/091 (2013.01); C03C 4/18 (2013.01); C03C 21/002 (2013.01); C03C 2204/00 (2013.01); Y10T 428/315 (2015.01)] 20 Claims
 
1. An article, comprising:
a layer extending from a surface of the article to a depth of layer, wherein the layer is under compression;
wherein the article is formed by ion exchanging a glass, wherein the glass comprises:
66-74 mol % SiO2;
9-20 mol % Na2O;
9-22 mol % Al2O3;
at least 2.7 mol % B2O3;
at least 0.1 mol % of at least one of MgO and ZnO,
wherein R2O (mol %)+CaO (mol %)+SrO(mol %)+BaO(mol %)−Al2O3 (mol %) −B2O3 (mol %)<0 mol %.