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:
Oct. 22, 2024
Filed:
May. 31, 2023
Applicants:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki, JP;
Inventors:
Hiroki Iwanaga, Yokohama, JP;
Kenji Miyazaki, Komae, JP;
Assignees:
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/06 (2006.01); C07F 5/00 (2006.01); C07F 9/53 (2006.01); F21K 2/00 (2006.01);
U.S. Cl.
CPC ...
C09K 11/06 (2013.01); C07F 5/003 (2013.01); C07F 9/5345 (2013.01); F21K 2/00 (2013.01); C09K 2211/182 (2013.01);
Abstract
The embodiments provide a fluorescent rare earth complex having strong emission intensity and excellent durability, and also provide a security medium using the complex. The rare earth complex according to the embodiment comprises a rare earth ion, a diphosphine dioxide ligand and a β-diketone ligand wherein two phosphorus atoms contained in the diphosphine dioxide ligand individually have substituents different from each other.