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:
Dec. 03, 2024
Filed:
Mar. 08, 2022
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Kanae Ogawa, Tokyo, JP;
Kohei Ohtani, Tokyo, JP;
Saori Suzuki, Tokyo, JP;
Hitomi Muto, Tokyo, JP;
Masakazu Shiraishi, Tokyo, JP;
Yu Hattori, Tokyo, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Abstract
The purpose of the present invention is to provide a novel anthraquinone compound, and to provide: a dichroic dye constituted of the novel anthraquinone compound; a liquid crystal composition which contains the dichroic dye; and preferably a dimming element having excellent contrast and light resistance and containing said composition. The present invention discloses an anthraquinone compound represented by formula A below (wherein Rrepresents a C3-16 branched alkyl group, and Rrepresents a hydrogen atom, a C1-8 straight-chain or branched alkyl group, or a C1-8 straight-chain or branched alkoxy group). In addition, the present invention discloses a liquid crystal composition including the anthraquinone compound and a liquid crystal material, and a dimming element containing said composition.