Glass composition

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Reexamination Certificate

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C501S066000, C501S067000

Reexamination Certificate

active

07960301

ABSTRACT:
A glass composition which is reduced in the amount of residual bubbles and is produced using smaller amounts of an environmentally unfriendly component such as arsenic oxide and antimony oxide. This glass composition comprises, in terms of mass %: 40-70% SiO2; 5-20% B2O3; 10-25% Al2O3; 0-10% MgO; 0-20% CaO; 0-20% SrO; 0-10% BaO; 0.001-0.5% Li2O; 0.01-0.5% Na2O; 0.002-0.5% K2O; and 0-1.0%, excluding 0%, Cl.

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Derwent Abstract 2003-251687 of JP 2003-026442 A and machine translation, Jan. 29, 2003.
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English Abstract of JP 2005-306719 A and machine translation, Nov. 4, 2005.
The English translation of the International Preliminary Report on Patentability and the Written Opinion of the International Searching Authority, mailed Feb. 20, 2008.

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