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:
Aug. 27, 2013
Filed:
Mar. 11, 2010
Toshiyuki Iida, Ibaraki, JP;
Tomoyuki Hirayama, Ibaraki, JP;
Yutaka Ohmori, Ibaraki, JP;
Miyuki Kurogi, Ibaraki, JP;
Hisae Shimizu, Ibaraki, JP;
Junichi Nagase, Ibaraki, JP;
Toshiyuki Iida, Ibaraki, JP;
Tomoyuki Hirayama, Ibaraki, JP;
Yutaka Ohmori, Ibaraki, JP;
Miyuki Kurogi, Ibaraki, JP;
Hisae Shimizu, Ibaraki, JP;
Junichi Nagase, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;
Abstract
The invention relates to an optical film containing polymers having different repeating units, and methods for production thereof. Further, the invention also relates to an optical laminate, a polarizing plate, and an image display device each using the optical film. The optical film of the invention advantageously has not only high solubility in solvents but also a high level of transparency since the polymers used in the optical film are compatible with each other. Further, wavelength dispersion of the birefringence of the optical film can be controlled by merely changing a ratio of polymers.