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:
May. 26, 2020
Filed:
Apr. 15, 2016
Applicant:
Kaneka Corporation, Osaka-shi, JP;
Inventors:
Assignee:
KANEKA CORPATION, Osaka-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 1/08 (2006.01); C08K 9/06 (2006.01); C08J 5/18 (2006.01); C08K 3/36 (2006.01); C08K 7/18 (2006.01); C08L 1/30 (2006.01); G02B 5/30 (2006.01); G02F 1/13363 (2006.01);
U.S. Cl.
CPC ...
G02B 1/08 (2013.01); C08J 5/18 (2013.01); C08K 3/36 (2013.01); C08K 7/18 (2013.01); C08K 9/06 (2013.01); C08L 1/30 (2013.01); G02B 5/3083 (2013.01); C08J 2301/28 (2013.01); C08K 2201/003 (2013.01); C08K 2201/011 (2013.01); C08L 2205/025 (2013.01); G02F 1/13363 (2013.01);
Abstract
The retardation film according to the present invention is characterized by: including a polymer material that includes at least one cellulose derivative which includes specific monomer units: having an in-plane retardation Re(550) of 105-160 nm, reverse wavelength dispersion property, Re(450)/Re(550), of 0.80-0.89, and a thickness of 20-50 μm; and containing inorganic particles. In particular, the present invention exhibits the effect of reducing the photoelastic coefficient.