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. 25, 2018
Filed:
Sep. 08, 2011
Applicants:
Tomohiro Mori, Ibaraki, JP;
Minoru Miyatake, Ibaraki, JP;
Takashi Kamijo, Ibaraki, JP;
Shusaku Goto, Ibaraki, JP;
Takeharu Kitagawa, Ibaraki, JP;
Inventors:
Tomohiro Mori, Ibaraki, JP;
Minoru Miyatake, Ibaraki, JP;
Takashi Kamijo, Ibaraki, JP;
Shusaku Goto, Ibaraki, JP;
Takeharu Kitagawa, Ibaraki, JP;
Assignee:
NITTO DENKO CORPORATION, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01); B29D 11/00 (2006.01); B29C 55/02 (2006.01); B29C 55/06 (2006.01); B29K 29/00 (2006.01);
U.S. Cl.
CPC ...
B29D 11/0073 (2013.01); B29C 55/026 (2013.01); B29C 55/06 (2013.01); G02B 5/305 (2013.01); B29K 2029/04 (2013.01); B29K 2995/0034 (2013.01); G02B 5/3025 (2013.01); G02B 5/3033 (2013.01); G02B 5/3041 (2013.01);
Abstract
A method of producing a thin polarizing film having an excellent polarization degree includes, forming a polyvinyl alcohol-based resin layer on a thermoplastic resin substrate to prepare a laminate, subjecting the laminate to underwater stretching in an aqueous solution of boric acid and stretching the laminate while drying the laminate after the underwater stretching.