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:
May. 07, 2013
Filed:
Jan. 15, 2007
Applicant:
Kanako Itou, Osaka, JP;
Inventor:
Kanako Itou, Osaka, JP;
Assignee:
Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D 5/06 (2006.01); B05D 3/02 (2006.01); B05D 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of producing a retardation plate includes the steps of applying a solution containing a resin B and a solvent to an optical base material containing a resin A to obtain a laminate including an optical base material layer and an application layer, and stretching the laminate, in which one of the resin A and the resin B has positive alignment birefringence, and another one of the resin A and the resin B has negative alignment birefringence, and the stretching is performed by setting an amount of a residual solvent in the laminate to be 2 to 10% by weight.