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:
Sep. 20, 2011
Filed:
Oct. 31, 2007
Yasuko Iwakawa, Ibaraki, JP;
Shusaku Nakano, Ibaraki, JP;
Shoichi Matsuda, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-Shi, Osaka, JP;
Abstract
An object of the present invention is to provide a thin optical laminate a refractive index of which is three-dimensionally controlled. The optical laminate of the present invention comprises a retardation layer containing a polycyclic compound having at least one of a —SOM group and a —COOM group, and having an index ellipsoid satisfying a relationship of nx≦nz>ny; and a retardation layer having an index ellipsoid satisfying a relationship of nx≧ny>nz. As the polycyclic compound, for example, a quinoxaline derivative represented by the following formula (I) is used.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile