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. 21, 2006
Filed:
Mar. 13, 2003
Applicants:
Takanori Isozaki, Kurashiki, JP;
Tetsushi Hayashi, Kurashiki, JP;
Toshio Nakai, Kurashiki, JP;
Naoki Fujiwara, Kurashiki, JP;
Inventors:
Takanori Isozaki, Kurashiki, JP;
Tetsushi Hayashi, Kurashiki, JP;
Toshio Nakai, Kurashiki, JP;
Naoki Fujiwara, Kurashiki, JP;
Assignee:
Kuraray Co., Ltd., Kurashiki, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08K 5/05 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention is a polyvinyl alcohol film having an YI value of at most 20, which is formed of a modified polyvinyl alcohol having a degree of polymerization of from 1500 to 5000, an ethylene unit content of from 1 to 4 mol % and a 1,2-glycol bond content of at most 1.4 mol %. The polyvinyl alcohol film gives polarizing films that contain no impurities and have good polarization performance, durability and hue stability.