Patent ID: 6656862
Filing Date: 2003-12-02
Classification: C03C,Y10S

Abstract:
A blue colored, infrared and ultraviolet radiation absorbing glass composition having a composition comprising a base glass portion comprising:SiO266 to 75 percent by weight,Na2O10 to 20 percent by weight,CaOâ€‚5 to 15 percent by weight,MgOâ€‚0 to 5  percent by weight,Al2Oâ€‚0 to 5 percent by weight,K2Oâ€‚0 to 5 percent by weight,and a solar radiation absorbing and colorant portion consisting essentially of:total ironâ€ƒâ€‰1 to 2 percent by weight,FeO0.15 to 0.65 percent by weight,CoOâ€‚â€‰90 to 250 PPM,TiO2â€ƒâ€‰0 to 0.9 percent by weight, andMnO2â€‚â€‰up to about 39 ppm,the glass having a luminous transmittance (LTA) of greater than 20% up to 60%, and a color characterized by a dominant wavelength in the range of 480 to 489 nanometers and an excitation purity of at least 8%, a total solar ultraviolet transmittance (TSUV) of 35 percent or less and a total solar infrared transmittance (TSIR) of 25 percent or less where all of these are determined for a thickness of 0.160 inches.