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:
Mar. 15, 2005
Filed:
Apr. 07, 2003
Applicants:
Junko Ishioka, Sagamihara, JP;
Masahiro Onozawa, Sagamihara, JP;
Inventors:
Junko Ishioka, Sagamihara, JP;
Masahiro Onozawa, Sagamihara, JP;
Assignee:
Kabushiki Kaisha Ohara, Kanagawa-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C003/118 ;
U.S. Cl.
CPC ...
Abstract
An optical glass having a positive anomalous dispersion comprises, in mass %, is free of PbO and AsOexcept for unavoidable mixing of these compounds as impurities, has optical constants of a refractive index (nd) within the range from 1.48 to less than 1.55 and an Abbe number (νd) within the range from 45 to 55, and has an anomalous dispersion (Δθg,F) of +0.0010 or over.