Transparent glass having blue edge color

Details Transparent glass having blue edge color Transparent glass having blue edge color

2005-11-08

2005-11-08

Sample, David (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S070000, C501S071000, C065S099200

Reexamination Certificate

active

06962887

ABSTRACT:
A method is provided for making clear glass having an azure edge coloration and low amber surface coloration in a non-vacuum float glass system. The method includes processing batch materials in a non-vacuum float glass system to provide a final glass product including:SiO265-75 wt. %; Na2O10-20 wt. %; CaO5-15 wt. %; MgO0-5 wt. %;Al2O30-5 wt. %;K2O0-5 wt. %;a colorant portion having total iron (Fe2O3) of 0-0.02 wt. %, CoO of 0-5 ppm, Nd2O3of 0-0.1 wt. %, and CuO of 0-0.03 wt. %. The glass has a redox ratio in the range of 0.2 to 0.6, and can have a retained sulfur content of less than or equal to 0.2 wt. %, such as less than or equal to 0.11 wt. %.

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patent: 2004/0043886 (2004-03-01), Akada et al.
patent: 976691 (2000-02-01), None
patent: 11060269 (1999-03-01), None
patent: WO 01/64595 (2001-09-01), None

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