US 7,482,294 B2
Clear glass composition with high visible transmittance
Ksenia A. Landa, Grosse Ile, Mich. (US); Leonid Landa, Grosse Ile, Mich. (US); Richard Hulme, Rochester Hills, Mich. (US); and Scott V. Thomsen, Milford, Mich. (US)
Assigned to Guardian Industries Corp., Auburn Hills, Mich. (US)
Filed on Aug. 31, 2006, as Appl. No. 11/513,010.
Application 11/513010 is a division of application No. 10/336859, filed on Jan. 06, 2003, granted, now 7,144,837.
Application 10/336859 is a continuation in part of application No. 10/056051, filed on Jan. 28, 2002, granted, now 6,610,622.
Prior Publication US 2006/0293163 A1, Dec. 28, 2006
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 3/087 (2006.01)
U.S. Cl. 501—70  [501/64; 501/71] 13 Claims
 
1. A glass comprising:
a base glass portion comprising (by weight percentage):
   
  SiO2 67 to 75%
  Na2O 10 to 20%
  CaO  5 to 15%
  MgO 0 to 8%
  Al2O3 0 to 5%
  K2O 0 to 5%
   
the glass also comprising:
   
  total iron (expressed Fe2O3): 0.04 to 0.10%
  glass redox: <=0.10
   
wherein the glass has a visible transmission of at least 90%, and has a* and b* color values from −0.5 to +0.5 so that the glass is decolorized by at least one of Ce and/or Co, and wherein the glass includes one of 0.07%, 0.06% or 0% cerium oxide.