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:
Jun. 02, 1998
Filed:
Oct. 25, 1996
Hiroki Katono, Iwaki, JP;
Masuhiro Shouji, Iwaki, JP;
Takeo Ogihara, Iwaki, JP;
Teruo Sakagami, Iwaki, JP;
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed herein is a plastic optical material, which has excellent glare-proofness and transparency and is low in the degree of coloring. The plastic optical material of the invention comprises a polymer containing a phosphate group and a trivalent neodymium ion therein, wherein the polymer further contains at least one metal ion selected from the group consisting of a trivalent praseodymium ion and a trivalent holmium ion. The phosphate group may preferably be chemically bonded to a molecular structure constituting the polymer. In particularly, the polymer may preferably be a copolymer obtained by copolymerizing a monomer represented by the following formula I: