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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.:

US 12637421 B1

PDFFull Text
Date of Patent:
May. 26, 2026

Filed:

Nov. 29, 2022

Anthraquinone compound, liquid crystal composition containing said compound, and dimming element

Applicant:

Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;

Inventors:

Kanae Ogawa, Tokyo, JP;

Kohei Ohtani, Tokyo, JP;

Masakazu Shiraishi, Tokyo, JP;

Hitomi Muto, Tokyo, JP;

Saori Suzuki, Tokyo, JP;

Assignee:

NIPPON KAYAKU KABUSHIKI KAISHA, Tokyo, JP;

Attorney:

Nields, Lemack & Frame, LLC

Primary Examiner:

Bijan Ahvazi

Int. Cl.
CPC ...
C07C 323/38 (2006.01); C09K 19/12 (2006.01); C09K 19/60 (2006.01);
U.S. Cl.
CPC ...
C07C 323/38 (2013.01); C09K 19/12 (2013.01); C09K 19/603 (2013.01); C09K 2019/123 (2013.01);
Abstract

The present invention is an anthraquinone compound represented by formula (1) (in the formula, Rrepresents a hydrogen atom, a straight chain or branched chain alkyl group having a carbon count of 1-12, or a straight chain or branched chain alkoxy group having a carbon count of 1-12. Rrepresents a hydrogen atom, a straight chain or branched chain alkyl group having a carbon count of 1-8, or a straight chain or branched chain alkoxy group having a carbon count of 1-8). Rmay be a straight chain or branched chain alkyl group having a carbon count of 1-8. Rmay be a straight chain or branched chain alkoxy group having a carbon count of 1-8, or may be a straight chain or branched chain alkyl group having a carbon count of 1-4. The present invention also relates to a dimming liquid crystal composition containing this anthraquinone compound and a liquid crystal material. The present invention also relates to a dimming element obtained by sandwiching the dimming liquid crystal composition or a photocured product thereof between a pair of substrates disposed facing each other, at least one among which is a transparent substrate having a transparent electrode.

Find Patent Forward Citations

Ogawa, Kanae. (2026). Anthraquinone compound, liquid crystal composition containing said compound, and dimming element (U.S. Patent No. 12637421). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12637421

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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