Neutral gray glass composition

Details Neutral gray glass composition Neutral gray glass composition

2011-03-08

2011-03-08

Group, Karl E (Department: 1731)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S071000

Reexamination Certificate

active

07902097

ABSTRACT:
The present invention is to provide a neutral gray colored glass composition that has a soda-lime-silica glass base composition containing as major colorants 0.30 to 0.70% by weight Fe2O3; 0 to 30 ppm of Co3O4; 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.

REFERENCES:
patent: 5837629 (1998-11-01), Combes et al.
patent: 6506700 (2003-01-01), Combes et al.
patent: 6998362 (2006-02-01), Higby et al.
patent: 2002/0155939 (2002-10-01), Seto et al.
patent: 2003/0050175 (2003-03-01), Seto et al.

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