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. 25, 2005
Filed:
Mar. 31, 2003
Applicants:
Shinya Mashiko, Sagamihara, JP;
Masahiro Onozawa, Sagamihara, JP;
Inventors:
Shinya Mashiko, Sagamihara, JP;
Masahiro Onozawa, Sagamihara, JP;
Assignee:
Kabushiki Kaisha Ohara, Kanagawa-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 3089 ; C03C 3091 ; C03C 393 ;
U.S. Cl.
CPC ...
Abstract
An optical glass which is free of PbO which causes environmental pollution and also is free of expensive TaOand NbOcomprises, in mass %, and has optical constants of a refractive index (nd) within a range from 1.55 to less than 1.67 and an Abbe number (νd) within a range from 30 to 45.