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Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 15, 2008
Patent Application Number
10931227
Date Filed
September 1, 2004
Patent Primary Examiner
Patent abstract
An alkali-free glass substrate containing, by mass percent, 50-70% of SiO2, 10-25% of Al2O3, 5-20% of B2O3, 0-10% of MgO, 0-15% of CaO, 0-10% of BaO, 0-10% of SrO and 0-5% of ZnO, also containing SnO2 and/or Sb2O3 and having a β-OH value of at least 0.485/mm.
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