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:
Aug. 07, 2018
Filed:
Feb. 21, 2012
Applicant:
Kyosuke Inoue, Tokyo, JP;
Inventor:
Kyosuke Inoue, Tokyo, JP;
Assignee:
ZEON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/32 (2006.01); B29C 55/02 (2006.01); B29C 55/14 (2006.01); G02B 5/30 (2006.01); B32B 7/02 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/36 (2006.01); B29D 11/00 (2006.01); B29K 25/00 (2006.01); B29K 69/00 (2006.01); G02F 1/13363 (2006.01);
U.S. Cl.
CPC ...
G02B 5/32 (2013.01); B29C 55/023 (2013.01); B29C 55/143 (2013.01); B29D 11/0073 (2013.01); B29D 11/00951 (2013.01); B32B 7/02 (2013.01); B32B 27/08 (2013.01); B32B 27/302 (2013.01); B32B 27/365 (2013.01); G02B 5/3083 (2013.01); B29K 2025/04 (2013.01); B29K 2069/00 (2013.01); B32B 2457/202 (2013.01); G02F 1/13363 (2013.01); G02F 2413/02 (2013.01); G02F 2413/14 (2013.01);
Abstract
Having a layer B formed of a resin 'b' having a negative intrinsic birefringence value; and layers A formed of a resin 'a' having a positive intrinsic birefringence value and formed on both surfaces of the layer B, wherein the resin “b” includes a styrene-based polymer, the resin “a” includes a polycarbonate, and a difference in average refractive index between the resin “b” and the resin “a” is 0.01 or more.