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. 11, 2017
Filed:
Jun. 09, 2015
Fujifilm Corporation, Tokyo, JP;
Hirofumi Toyama, Kanagawa, JP;
Yoshinori Maeda, Kanagawa, JP;
Isao Fujiwara, Kanagawa, JP;
Ryuji Saneto, Kanagawa, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A thin optical film with high hygrothermal durability and high front contrast, includes cellulose acylate whose degree of substitution of acyl group is from 2.0 to 2.6 and at least one optical performance developer, wherein the cellulose acylate has a mannose content of 0.2% by mass or less, and the optical film has a thickness of 40 μm or thinner and satisfies:×1.1  Formula I×1.1  Formula IIwherein, A denotes the depthwise region ranging from one surface up to 2 μm depth of the optical film, and B denotes the depthwise region ranging from the other surface up to 2 μm depth, and Mand Mrepresent the mannose content in regions A and B; Cand Crepresent the content of the optical performance developer in regions A and B; and M, M, Cand Care given in % by mass.