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:
Jan. 26, 2010
Filed:
Apr. 29, 2004
Applicants:
Christiane Meyer, Hamburg, DE;
Markus Haase, Hamburg, DE;
Inventors:
Christiane Meyer, Hamburg, DE;
Markus Haase, Hamburg, DE;
Assignee:
Centrum fur Angewandte Nanotechnologie (CAN) GmbH, Hamburg, DE;
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to Luminescent nanoparticles comprising (a) a core made from a luminescent metal salt selected from phosphates, sulfates or fluorides, being surrounded by (b) a shell made from a metal salt or oxide capable of preventing or reducing energy transfer from the core after its electronic excitation to the surface of the nanoparticle, e.g. a shell made from a non-luminescent metal salt or oxide, which are characterized by higher quantum yields and can be used in various fields including light generation and security marking.