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:
Jan. 22, 2013
Filed:
Mar. 23, 2007
Applicants:
Kazutaka Hayashi, Yokohama, JP;
Kouichi Satou, Nishitokyo, JP;
Koichiro Shiraishi, Akishima, JP;
Inventors:
Assignee:
Hoya Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/15 (2006.01); C03C 3/068 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lens formed of a high-refractivity low-dispersion glass and free of fogging and scorching on its optical-function surface, which is obtained by precision press-molding of an optical glass having a refractive index (n) of over 1.83, an Abbe's number (ν) of 40 or more and a glass transition temperature (T) of 640° C. or lower and containing no LiO and has one form of a meniscus form, a biconcave form or a plano-concave form.