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. 07, 2006
Filed:
Apr. 30, 2002
Masayuki Sekiguchi, Ichihara, JP;
Yasuhiro Sakakura, Ichihara, JP;
Hiraku Shibata, Ichihara, JP;
JSR Corporation, Tokyo, JP;
Abstract
Optical films are provided for which the retardation generated, and the wavelength dispersion of that retardation, are able to be controlled. (1) An optical film containing a thermoplastic norbornene resin with a photoelastic coefficient (C) within a range from 0 to 100 (×10Pa), and a stress optical coefficient (C) within a range from 1500 to 4000 (×10Pa). (2) An optical film containing a thermoplastic norbornene resin either with a group represented by the general formula (2), shown below, or with at least one group selected from the general formulas (3) and (4) shown below. —(CH)—O—C(O)—R