Patent ID: 8906506
Filing Date: 2014-12-09
Classification: C03C,Y10T

Abstract:
1. A glass article formed from a glass containing a total of 10 percent by weight or more of potassium oxide K substantially containing neither lead oxide PbO nor barium oxide BaO, and having the following glass composition comprising: SiO Al Na K MgO in a content of 2 percent by weight or more and 3 percent by weight or less; CaO in a content of 3 percent by weight or more and 4.2 percent by weight or less; SrO in a content of more than 3.2 percent by weight and less than 4.2 percent by weight; ZnO in a content of 0.5 percent by weight or more and 2 percent by weight or less; TiO Sb one or more of SnO