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:
Jul. 03, 2012
Filed:
Dec. 24, 2009
Tadahiro Kaminade, Yokohama, JP;
Shinichi Komatsu, Yokohama, JP;
Hisashi Sone, Yokohama, JP;
Takeshi Koike, Yokohama, JP;
Sayako Kawahama, Yokohama, JP;
Tadahiro Kaminade, Yokohama, JP;
Shinichi Komatsu, Yokohama, JP;
Hisashi Sone, Yokohama, JP;
Takeshi Koike, Yokohama, JP;
Sayako Kawahama, Yokohama, JP;
JX Nippon Oil & Energy Corporation, Tokyo, JP;
Abstract
A reverse dispersion retardation film is formed by stretching a film containing a norbornene-based ring-opening copolymer containing a structural unit (A) represented by a general formula (1) and a structural unit (B) represented by a general formula (2), wherein a total amount of the structural unit (A) and an exo-form structural unit, among the structural units (B), is not less than 20 mol % but not more than 65 mol % of all the structural units.