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:
Dec. 28, 2004
Filed:
Nov. 01, 2002
Applicant:
Inventors:
Michie Sakamoto, Ibaraki, JP;
Amane Mochizuki, Ibaraki, JP;
Assignee:
Nitto Denko Corporation, Ibaraki, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G 1/400 ; C08G 1/000 ;
U.S. Cl.
CPC ...
C08G 1/400 ; C08G 1/000 ;
Abstract
An optical film containing polyaryletherketone and a method of producing the optical film, the optical film being excellent in the heat resistance and uniformity, and the film having a negative birefringence. The optical film compensates birefringence of a liquid crystal display, thereby providing an optical element or an image display device that has desired color tones and viewing-angle characteristics. The optical film having a negative birefringence of 0.001 to 0.6 is produced by coating a solution containing polyaryletherketone on a substrate and subsequently drying the coating.