Limited visible transmission blue glasses
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United States of America Patent
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Oct 11, 2005
Issued Date -
N/A
app pub date -
Jan 14, 2002
filing date -
May 12, 1998
priority date (Note) -
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Abstract
A blue colored, infrared and ultraviolet absorbing glass composition having a luminous transmittance of up to 60 percent can form transparent glass panel sets for mounting in automobiles. A non-limiting glass composition includes a standard soda-lime-silica glass base composition and a solar radiation absorbing and colorant portion having 0.9 to 2.0 percent by weight total iron, 0.15 to 0.65 percent by weight FeO, 90 to 250 PPM CoO, and optionally up to 12 PPM Se and up to 0.9 wt % TiO2, and preferably 1 to 1.4 percent by weight total iron, 0.20 to 0.50 percent by weight FeO, 100 to 150 PPM CoO, up to 8 PPM Se, and up to 0.5 wt % TiO2, at a thickness of 0.160 inches (4.06 millimeters) the glass has a dominant wavelength in the range of 480 to 489 nanometers and an excitation purity of at least 8 percent.
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