Glass manufacturing – Processes – Sequentially forming – reheating – and working
Reexamination Certificate
2009-06-23
2010-11-09
Group, Karl E (Department: 1793)
Glass manufacturing
Processes
Sequentially forming, reheating, and working
C065S063000, C501S077000, C501S078000, C501S079000
Reexamination Certificate
active
07827823
ABSTRACT:
An optical glass having high refractivity and a low sag temperature and having a low-temperature softening property that enables precision press-molding is provided, and the optical glass contains, by mol %, 5 to 50% of B2O3, 3 to 50% of SiO2, 5 to 40% of TiO2, 1 to 40% of ZnO, 5 to 20% of La2O3, 0 to 10% of Gd2O3, 0 to 15% of Nb2O5, 0 to 10% of ZrO2, 0 to 5% of Ta2O5, 0 to 10% of Bi2O3, 0 to 10% of MgO, 0 to 8% of CaO, 0 to 10% of SrO, 0 to 10% of BaO, provided that the total content of MgO, CaO, SrO and BaO is 15% or less, 0 to 20% of Li2O, and 0 to 5% of Na2O, optionally containing Sb2O3as a refining agent, and having a refractive index (nd) of 1.8 or more and an Abbe's number (νd) of 35 or less.
REFERENCES:
patent: 4128432 (1978-12-01), Komorita et al.
patent: 4179300 (1979-12-01), Sagara
patent: 4268312 (1981-05-01), Ishibashi et al.
patent: 4612295 (1986-09-01), Sagara
patent: 4742028 (1988-05-01), Boudot et al.
patent: 5288669 (1994-02-01), Grateau et al.
patent: 6121176 (2000-09-01), Comte
patent: 6187702 (2001-02-01), Morishita
patent: 7091145 (2006-08-01), Wolff et al.
patent: 7232779 (2007-06-01), Kasuga et al.
patent: 2003/0022782 (2003-01-01), Uehara
patent: 2004/0023787 (2004-02-01), Wolff et al.
patent: 2004/0106507 (2004-06-01), Kasuga et al.
patent: 2004/0145815 (2004-07-01), Endo
patent: 2004/0220041 (2004-11-01), Isowaki et al.
patent: 2004/0242397 (2004-12-01), Nakayama
patent: 2005/0209085 (2005-09-01), Endo
patent: 2007/0049483 (2007-03-01), Hayashi
patent: 2008/0194395 (2008-08-01), Endo
patent: 1472154 (2004-04-01), None
patent: 1495137 (2004-05-01), None
patent: 49-21408 (1974-02-01), None
patent: 58-125636 (1983-07-01), None
patent: 62-100449 (1987-05-01), None
patent: 2000-159537 (2000-06-01), None
patent: 2001-509126 (2001-07-01), None
patent: 2003-267748 (2003-09-01), None
patent: 2004-18371 (2004-01-01), None
patent: 2004-99428 (2004-04-01), None
patent: 2004-175592 (2004-06-01), None
patent: 2004-175632 (2004-06-01), None
patent: WO 2004/087596 (2004-10-01), None
1991 Data Book of Glass Composition, p. 106, published by Glass Manufacturers' Association of Japan (GMAJ), with English translation.
Kasuga Yoshiko
Zou Xuelu
Bolden Elizabeth A
Group Karl E
Hoya Corporation
Nixon & Vanderhye P.C.
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