Claims
- 1. A clear, light gray-brown glass exhibiting a spectral transmittance curve approximating that set forth in FIG. 6, FIG. 8, and FIG. 9 having a composition consisting essentially, in parts by weight on the oxide basis, of about 4.7-5.15 Na.sub.2 O, 2-2.21 Al .sub.2 O.sub.3 , 12.35-14.16 B.sub.2 O.sub.3, 78.0-80.0 SiO.sub.2, 0.001-0.006 Co.sub.3 O.sub.4, 0.037-0.055 NiO, and 0.21-0.6 MnO.sub.2.
- 2. A clear, light gray-brown glass according to claim 1 consisting essentially, in parts by weight on the oxide basis, of about 4.7 Na.sub.2 O, 2.0 Al.sub.2 O .sub.3, 12.9 B.sub.2 O .sub.3, 79.4 SiO.sub.2, 0.003 Co.sub.3 O.sub.4, 0.055 NiO, and 0.21 MnO.sub.2.
- 3. A clear, light gray-brown, thermally tempered glass according to claim 1 consisting essentially, in parts by weight on the oxide basis, of
- ______________________________________ Na.sub.2 O 5.15 .+-. 0.1 B.sub.2 O.sub.3 12.35 .+-. 0.3 MnO.sub.2 0.5 .+-. 0.08 NiO 0.052 .+-. 0.002 Co.sub.3 O.sub.4 0.001 .+-. 0.0003 Al.sub.2 O.sub.3 2.0 .+-. 0.05 SiO.sub.2 Balance______________________________________
Parent Case Info
This application is a continuation-in-part of application Ser. No. 809,325, filed June 23, 1977 now abandoned.
US Referenced Citations (6)
Non-Patent Literature Citations (1)
Entry |
Volf, M. B., "Technical Glasses", Sir Issac Pitman & Sons, Ltd., London, 1961, pp. 129-156. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
809325 |
Jun 1977 |
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