Neutral gray glass composition
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United States of America Patent
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Mar 8, 2011
Grant Date -
Jun 10, 2010
app pub date -
Dec 8, 2008
filing date -
Dec 8, 2008
priority date (Note) -
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Abstract
; 1 to 20 ppm of Se; and 20 to 200 ppm of CuO. The glass provides an illuminant “A” light transmission greater of 65%, a total solar energy transmittance of less than or equal to 60%, a solar ultraviolet transmittance of less than 46%; a dominant wavelength from 490 nm to 600; and an excitation purity of less than 6.
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