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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 12595408 B1

PDFFull Text
Date of Patent:
Apr. 07, 2026

Filed:

Jan. 13, 2023

Photochromic compound, naphthol derivative, curable composition, optical article, lens, and eyeglasses

Applicant:

Tokuyama Corporation, Yamaguchi, JP;

Inventors:

Masayuki Miyazaki, Yamaguchi, JP;

Srinivas Venu, Yamaguchi, JP;

Katsuhiro Mori, Yamaguchi, JP;

Assignee:

TOKUYAMA CORPORATION, Yamaguchi, JP;

Attorney:

GREENBLUM & BERNSTEIN, P.L.C.

Primary Examiner:

Bijan Ahvazi

Int. Cl.
CPC ...
C09K 9/02 (2006.01); C07C 39/42 (2006.01); C07C 43/23 (2006.01); C07C 217/78 (2006.01); C07C 323/21 (2006.01); C07D 311/94 (2006.01); C07D 317/70 (2006.01); C07D 327/04 (2006.01); C07D 493/04 (2006.01); C07D 497/04 (2006.01); C08K 5/1545 (2006.01); C08K 5/1565 (2006.01); C08K 5/357 (2006.01); C09B 57/02 (2006.01); G02B 1/04 (2006.01); G02C 7/10 (2006.01);
U.S. Cl.
CPC ...
C09K 9/02 (2013.01); C07C 39/42 (2013.01); C07C 43/23 (2013.01); C07C 217/78 (2013.01); C07C 323/21 (2013.01); C07D 311/94 (2013.01); C07D 317/70 (2013.01); C07D 327/04 (2013.01); C07D 493/04 (2013.01); C07D 497/04 (2013.01); C08K 5/1545 (2013.01); C08K 5/1565 (2013.01); C08K 5/357 (2013.01); C09B 57/02 (2013.01); G02B 1/041 (2013.01); C07C 2603/40 (2017.05); C09K 2211/1018 (2013.01); G02C 7/102 (2013.01);
Abstract

The purpose of the present invention is to provide: a photochromic compound having an excellent color fading rate and excellent durability; a naphthol derivative that can become an intermediate for the photochromic compound; and a curable composition, an optical article, a lens and eyeglasses each containing the photochromic compound. According to embodiments, a photochromic compound having a backbone represented by formula (1) is provided. In formula (1), M represents C, Si or Ge; Rrepresents a haloalkyl group having 1 to 20 carbon atoms inclusive; Rrepresents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms inclusive or a substituted or unsubstituted haloalkyl group having 1 to 20 carbon atoms inclusive.

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