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:
Jun. 06, 2017
Filed:
Oct. 20, 2014
Applicant:
Kaneka Corporation, Osaka-shi, JP;
Inventors:
Ryutaro Mukai, Settsu, JP;
Tomohiro Abo, Otsu, JP;
Assignee:
KANEKA CORPORATION, Osaka-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/13363 (2006.01); G02B 5/30 (2006.01); B29C 55/06 (2006.01); C08J 5/18 (2006.01); B29C 55/04 (2006.01); B29D 11/00 (2006.01); G02B 1/111 (2015.01); G02F 1/1335 (2006.01); B29K 1/00 (2006.01); B29L 11/00 (2006.01);
U.S. Cl.
CPC ...
G02B 5/3083 (2013.01); B29C 55/04 (2013.01); B29C 55/06 (2013.01); B29D 11/00788 (2013.01); C08J 5/18 (2013.01); G02B 1/111 (2013.01); G02B 5/305 (2013.01); G02F 1/13363 (2013.01); G02F 1/133528 (2013.01); B29K 2001/08 (2013.01); B29L 2011/00 (2013.01); G02F 2001/133541 (2013.01); G02F 2001/133635 (2013.01); G02F 2202/40 (2013.01); G02F 2413/13 (2013.01); Y10T 428/105 (2015.01);
Abstract
The present invention achieves a phase difference film that is excellent in wavelength dispersion property, in-plane retardation, and film thickness, by using a polymeric material (i) which is composed of at least one type of cellulose derivative having a specific alkoxyl group substitution degree Dand a specific 2-naphthoyl group substitution degree Dand (ii) which has a specific total 2-naphthoyl group substitution degree D.