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:
Sep. 01, 2020
Filed:
Feb. 17, 2016
Applicant:
Denka Company Limited, Tokyo, JP;
Inventors:
Masayoshi Ichikawa, Fukuoka, JP;
Ryosuke Kondo, Fukuoka, JP;
Hideyuki Emoto, Fukuoka, JP;
Motoi Tanaka, Fukuoka, JP;
Assignee:
DENKA COMPANY LIMITED, Tokyo, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 11/61 (2006.01); C09K 11/66 (2006.01); C09K 11/64 (2006.01); C09K 11/02 (2006.01); C01B 33/10 (2006.01); C01G 45/00 (2006.01); C09K 11/08 (2006.01); C01D 3/02 (2006.01); C01D 3/22 (2006.01); C09K 11/57 (2006.01); C09K 11/59 (2006.01);
U.S. Cl.
CPC ...
C09K 11/616 (2013.01); C01B 33/10 (2013.01); C01D 3/02 (2013.01); C01D 3/22 (2013.01); C01G 45/006 (2013.01); C09K 11/08 (2013.01); C09K 11/57 (2013.01); C09K 11/59 (2013.01); C09K 11/617 (2013.01); C01P 2002/54 (2013.01);
Abstract
The present invention relates to a process for producing a composite-fluoride fluorescent material represented by the general formula AMF:Mn(wherein A is at least one alkali metal element including K; M is one or more metallic elements including at least Si or Ge and selected from among Si, Ge, Sn, Ti, Zr, and Hf; F is fluorine; and Mn is manganese). With the production process, it is possible to obtain a fluorescent material which is high in absorptance, internal quantum efficiency, and external quantum efficiency and has excellent optical properties.