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:
Apr. 23, 2013
Filed:
Feb. 21, 2008
Seiji Okada, Tokyo, JP;
Kentarou Tamura, Tokyo, JP;
Seiji Okada, Tokyo, JP;
Kentarou Tamura, Tokyo, JP;
Zeon Corporation, Tokyo, JP;
Abstract
A liquid crystalline compound shown by the following formula (I). wherein Rto Rrepresent a hydrogen atom, a fluorine atom, a methyl group, a trifluoromethoxy group, or a cyano group, X represents —O—, —O—CO—, or the like, n is 0 or 1, and Rrepresents -A-CO—CH═CH, wherein A is a linking group. The liquid crystalline compound has a higher liquid crystal phase upper limit temperature, is chemically stable, can be inexpensively produced, and exhibits a large selective reflection wavelength zone Δλ (a large Δn). A liquid crystalline composition comprising the liquid crystalline compounds, an optical film having a liquid crystal layer formed using the liquid crystalline composition, and an optical laminate comprising a substrate, an alignment film formed on the substrate, a liquid crystal layer formed using the liquid crystalline composition on the alignment film are also disclosed.