US 12,012,359 B2
Glass
Atsuki Saito, Shiga (JP)
Assigned to Nippon Electric Glass Co., Ltd., Shiga (JP)
Filed by Nippon Electric Glass Co., Ltd., Shiga (JP)
Filed on Jun. 14, 2021, as Appl. No. 17/346,663.
Application 17/346,663 is a continuation of application No. 16/470,765, granted, now 11,066,326, previously published as PCT/JP2017/044919, filed on Dec. 14, 2017.
Claims priority of application No. 2016-246579 (JP), filed on Dec. 20, 2016; and application No. 2017-041661 (JP), filed on Mar. 6, 2017.
Prior Publication US 2021/0300813 A1, Sep. 30, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 3/091 (2006.01)
CPC C03C 3/091 (2013.01) 11 Claims
 
1. A glass, comprising as a glass composition, in terms of mass %, 55% to 70% of SiO2, 17% to 25% of Al2O3, 1.5% to 5% of B2O3, 0% to 0.5% of Li2O+Na2O+K2O, 0% to 4% of MgO, 5% to 11% of CaO, 0% to 4% of SrO, 0% to 1.5% of P2O5, and 2% to 9% of BaO, and having a strain point of more than 715° C.,
wherein the glass has a ratio of CaO/BaO in terms of mass % of 1.15 to 3.17.