Glass manufacturing – Processes – Sequentially forming – reheating – and working
Reexamination Certificate
2004-08-13
2009-10-20
Group, Karl E (Department: 1793)
Glass manufacturing
Processes
Sequentially forming, reheating, and working
C065S063000, C501S046000, C501S901000, C501S045000, C501S047000, C501S048000
Reexamination Certificate
active
07603876
ABSTRACT:
An optical glass that has high-refractivity and high-dispersion properties, that is less colored and that is suitable for a shapable glass material for press-shaping and various optical elements, the optical glass containing, as glass components and by mass %, 10 to 32% of P2O5, 27 to 65% of Nb2O5, 10 to 30% of BaO, 0 to 12% of B2O3, more than 0% but not more than 20% of TiO2, more than 0% but not more than 10% of total of Li2O, Na2O and K2O, and more than 0% but not more than 1%, based on the total content of the said glass components, of Sb2O3, and having a light transmittance that is 50% at a wavelength of 420 nm or shorter.
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Bolden Elizabeth A
Group Karl E
Hoya Corporation
Nixon & Vanderhye P.C.
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