Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Reexamination Certificate
2005-10-11
2009-08-18
Group, Karl E (Department: 1793)
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
C501S079000, C501S078000, C501S051000, C428S426000
Reexamination Certificate
active
07576020
ABSTRACT:
Provided is an optical glass for precision press-molding is free from degradations in product quality caused by a surface altered layer such as fogging, browning, etc., and a precision press-molding preform and an optical element provided are formed of the above glass. The optical glass is a glass which contains B2O3, La2O3and ZnO and is used as a glass material for precision press-molding, and contains, by mol %, 20 to 60% of B2O3, 0 to 20% of SiO2, 22 to 42% of ZnO, 5 to 24% of La2O3, 0 to 20% of Gd2O3, provided that the total content of La2O3and Gd2O3is 10 to 24%, 0 to 10% of ZrO2, 0 to 10% of Ta2O5, 0 to 10% of WO3, 0 to 10% of Nb2O5, 0 to 10% of TiO2, 0 to 10% of Bi2O3, 0 to 10% of GeO2, 0 to 10% of Ga2O3, 0 to 10% of Al2O3, 0 to 10% of BaO, 0 to 10% of Y2O3and 0 to 10% of Yb2O3, has an Abbe's number (νd) of 40 or more and is substantially free of lithium.
REFERENCES:
patent: 4144076 (1979-03-01), Matsumaru
patent: 6844279 (2005-01-01), Hayashi et al.
patent: 7033966 (2006-04-01), Kobayashi et al.
patent: 2003/0125186 (2003-07-01), Hayashi et al.
patent: 2005/0049135 (2005-03-01), Hayashi
patent: 2005/0113240 (2005-05-01), Hayashi et al.
patent: 2006/0194686 (2006-08-01), Kobayashi et al.
patent: 2008/0026928 (2008-01-01), Hayashi et al.
patent: 1236694 (2002-09-01), None
patent: 53-71115 (1978-06-01), None
patent: 55-116641 (1980-09-01), None
patent: 62-100449 (1987-05-01), None
patent: 8-26766 (1996-01-01), None
patent: 8-59282 (1996-03-01), None
patent: 2002-12443 (2002-01-01), None
patent: 2002-201041 (2002-07-01), None
patent: 2002-249337 (2002-09-01), None
patent: 2002-362938 (2002-12-01), None
patent: 2004-161506 (2004-06-01), None
patent: 2004161506 (2004-06-01), None
patent: 2005-47732 (2005-02-01), None
patent: WO 2004/087596 (2004-10-01), None
Bolden Elizabeth A
Group Karl E
Hoya Corporation
Nixon & Vanderhye P.C.
LandOfFree
Optical glass, precision press-molding preform, process for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical glass, precision press-molding preform, process for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical glass, precision press-molding preform, process for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4065343