Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Reexamination Certificate
2007-03-20
2011-10-11
Group, Karl (Department: 1731)
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
C501S050000, C501S051000, C501S078000, C065S064000
Reexamination Certificate
active
08034733
ABSTRACT:
An optical glass comprises, denoted as weight percentages, SiO2-2-22%, B2O3: 3-24%, ZnO:>8% and ≦30%, CaO+BaO+ZnO: 10-50%, MgO: 0-3%, La2O3+Y2O3+Gd2O3+Yb2O3: 1-33%, TiO2: 2-20%, ZrO2: 0-10%, Nb2O5: 2-32%, Li2O: 0-5%, Na2O: 0-8%, K2O: 0-10%, WO3: 0-20%. The ratio by weight of La2O3to the combined contents of La2O3, Y2O3, Gd2O3, and Yb2O3(La2O3/(La2O3+Y2O3+Gd2O3+Yb2O3)) falls within a range of 0.7 to 1.
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Hachitani Yoichi
Kobayashi Yuta
Bolden Elizabeth A
Group Karl
Hoya Corporation
Sughrue & Mion, PLLC
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