The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 2006
Filed:
Dec. 17, 2003
Applicant:
Susumu Uehara, Sagamihara, JP;
Inventor:
Susumu Uehara, Sagamihara, JP;
Assignee:
Kabushiki Kaisha Ohara, Kanagawa-ken, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/064 (2006.01); C03C 3/066 (2006.01); C03C 4/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is provided an optical glass suitable for mold pressing having optical constants of a refractive index (n) within a range from 1.60 to 1.69 and Abbe number (ν) within a range from 35 to 45, having a glass transition point (Tg) within a range from 300° C. to 500° C., being free from devitrification when the optical glass is held at a temperature which is higher by 100° C. than the glass transition point (Tg) for 30 minutes, comprising in mass % on oxide basis: and being free from LaO, TiO, TaOand PbO.