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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 11795391 B1

PDFFull Text
Date of Patent:
Oct. 24, 2023

Filed:

Apr. 08, 2019

Red phosphor and light emitting device

Applicant:

Denka Company Limited, Tokyo, JP;

Inventors:

Yusuke Takeda, Omuta, JP;

Tomohiro Nomiyama, Omuta, JP;

Marina Takamura, Omuta, JP;

Shintaro Watanabe, Omuta, JP;

Assignee:

DENKA COMPANY LIMITED, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Tu-Tu V Ho

Int. Cl.
CPC ...
C09K 11/77 (2006.01); H01L 33/50 (2010.01); C01B 21/06 (2006.01); C09K 11/08 (2006.01);
U.S. Cl.
CPC ...
C09K 11/77348 (2021.01); C01B 21/0602 (2013.01); C09K 11/0883 (2013.01); H01L 33/502 (2013.01); C01P 2002/54 (2013.01); C01P 2004/02 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01); C01P 2006/60 (2013.01);
Abstract

A phosphor having a main crystal phase having a crystal structure identical to that of CaAlSiN, and including a Ca element partially replaced with an Eu element, wherein the phosphor has a median size d50 of 12.0 μm or more and 22.0 μm or less, as measured according to a laser diffraction scattering method, and has a specific surface area of 1.50 m/g or more and 10.00 m/g or less, as measured according to a BET method.

Find Patent Forward Citations

Takeda, Yusuke. (2023). Red phosphor and light emitting device (U.S. Patent No. 11795391). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11795391

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

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