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:
Jul. 25, 2023
Filed:
Apr. 28, 2022
Applicant:
Zeon Corporation, Tokyo, JP;
Inventor:
Toshihide Murakami, Tokyo, JP;
Assignee:
ZEON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01); B42D 25/364 (2014.01); B42D 25/328 (2014.01); G02B 5/32 (2006.01); G02B 5/18 (2006.01); C08G 61/08 (2006.01); C08J 5/18 (2006.01); G02F 1/13363 (2006.01);
U.S. Cl.
CPC ...
G02B 5/3083 (2013.01); B42D 25/328 (2014.10); B42D 25/364 (2014.10); C08G 61/08 (2013.01); C08J 5/18 (2013.01); G02B 5/18 (2013.01); G02B 5/30 (2013.01); G02B 5/32 (2013.01); G02F 1/133634 (2013.01); C08G 2261/3324 (2013.01); C08G 2261/418 (2013.01); C08J 2365/00 (2013.01); G02F 1/133638 (2021.01);
Abstract
Provided is a phase difference film formed of a resin containing a polymer having crystallizability. The phase difference film has an NZ factor of less than 1 and an in-plane retardation Re that satisfies 125 nm≤Re≤345 nm. The polymer has a crystallization degree of 15% or more. Alternatively, the polymer is an alicyclic structure-containing polymer being a hydrogenated product of a ring-opening polymer of dicyclopentadiene.