Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Reexamination Certificate
2007-12-18
2007-12-18
Lorengo, J. A. (Department: 1755)
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
C501S045000, C501S047000, C501S901000, C501S903000, C065S066000, C065S102000
Reexamination Certificate
active
10826308
ABSTRACT:
The present invention relates to optical glass having a high refractive index, high dispersion, and a low glass transition temperature; a preform comprised of the optical glass for precision press-molding and a method of manufacturing the same; and an optical element comprised of the optical glass and a method of manufacturing the same. An example of the optical glasses for precision press molding is characterized by comprising essential components in the form of P2O5, Nb2O5, WO3, TiO2, Bi2O3, Li2O, and Na2O; comprising optional components in the form of B2O3, BaO, ZnO, K2O, Sb2O3, and As2O3; where the content of Bi2O3exceeds 4 weight percent but does not exceed 15 molar percent; the content of Li2O exceeds 3 weight percent but does not exceed 15 weight percent; the combined quantity of Nb2O5, WO3, TiO2, and Bi2O3is from 25 to 45 molar percent; the combined quantity of Li2O, Na2O, and K2O is less than or equal to 42 molar percent; the combined quantity of the essential components and optional components is greater than or equal to 98 molar percent; the refractive index (nd) is from 1.75 to 2.0; and the Abbé number (νd) is from 18 to 30.
REFERENCES:
patent: 5668066 (1997-09-01), Oguma et al.
patent: 6225244 (2001-05-01), Oguma
patent: 6333282 (2001-12-01), Nakahata et al.
patent: 6743743 (2004-06-01), Sato
patent: 6786064 (2004-09-01), Hayashi et al.
patent: 6875714 (2005-04-01), Izuki
patent: 6995101 (2006-02-01), Zou et al.
patent: 7060640 (2006-06-01), Ogino et al.
patent: 7157391 (2007-01-01), Kasuga et al.
patent: 2002/0073735 (2002-06-01), Hayashi et al.
patent: 2004/0259714 (2004-12-01), Fujiwara et al.
patent: 2005/0032621 (2005-02-01), Zou et al.
patent: 2005/0164862 (2005-07-01), Shiraishi
patent: 2006/0058171 (2006-03-01), Izuki
patent: 2006/0081010 (2006-04-01), Zou et al.
patent: 2007/0027016 (2007-02-01), Ogino et al.
patent: 1 078 894 (2001-02-01), None
Patent Abstracts of Japan, JP 08-104537, Apr. 23, 1996.
Patent Abstracts of Japan, JP 2003-160355, Jun. 3, 2003.
Fujiwara Yasuhiro
Zou Xuelu
Bolden Elizabeth A
Hoya Corporation
Lorengo J. A.
Sughrue & Mion, PLLC
LandOfFree
Optical glass; press-molding preform and method of... 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; press-molding preform and method of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical glass; press-molding preform and method of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3848072