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. 22, 2014
Filed:
Aug. 12, 2011
Applicants:
Toru Umemoto, Osaka, JP;
Tadayuki Kameyama, Osaka, JP;
Inventors:
Toru Umemoto, Osaka, JP;
Tadayuki Kameyama, Osaka, JP;
Assignee:
Nitto Denko Corporation, Ibaraki-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B 31/02 (2006.01); C09B 31/057 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method for manufacturing a water resistant optically anisotropic film comprising: a water resistant treatment step of bringing an optically anisotropic film containing an organic dye having an anionic group into contact with a water resistant treatment liquid containing a multivalent metal salt or a compound having two or more nitrogen atoms in a molecule thereof; and a cleaning step of cleaning the optically anisotropic film after the water resistant treatment, using a cleaning liquid containing a hydrophilic organic compound.