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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 12577464 B1

PDFFull Text
Date of Patent:
Mar. 17, 2026

Filed:

Oct. 24, 2023

Quantum dot and method for producing the same

Applicant:

Ns Materials Inc., Fukuoka, JP;

Inventors:

Soichiro Nikata, Fukuoka, JP;

Yoko Michiwaki, Fukuoka, JP;

Tomoaki Hieda, Fukuoka, JP;

Yuko Ogura, Fukuoka, JP;

Akio Mishima, Fukuoka, JP;

Vit Kalousek, Fukuoka, JP;

Assignee:

TOPPAN INC., Tokyo, JP;

Attorney:

GREENBLUM & BERNSTEIN, P.L.C.

Primary Examiner:

Matthew E Hoban

Int. Cl.
CPC ...
C09K 11/88 (2006.01); C01G 15/00 (2006.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01);
U.S. Cl.
CPC ...
C09K 11/883 (2013.01); C01G 15/006 (2013.01); B82Y 20/00 (2013.01); B82Y 40/00 (2013.01); C01P 2004/64 (2013.01); C01P 2006/60 (2013.01);
Abstract

To provide Cd-free chalcopyrite-based quantum dots with a narrow fluorescence FWHM and a high fluorescence quantum yield. The quantum dots of the present invention contain AgInGaSSeor ZnAgInGaSSe(where 0≤x<1 and 0≤y≤1) and exhibit fluorescence properties including a fluorescence FWHM of less than or equal to 45 nm and a fluorescence quantum yield of greater than or equal to 35% in the green wavelength range to the red wavelength range.

Find Patent Forward Citations

Nikata, Soichiro. (2026). Quantum dot and method for producing the same (U.S. Patent No. 12577464). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12577464

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

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