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Fluorescent compositions

United States Patent

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10,538,701
January 21, 2020
View the Complete Patent at the US Patent & Trademark Office
A fluorescent composition includes at least one of a fluorescent sensor compound and organic reporter molecules encapsulated in a microsphere structure. When encapsulated, the fluorescent sensor compound and the organic reporter molecules are distributed in a liquid organic matrix. When non-encapsulated, the remaining one of the fluorescent sensor compound and the organic reporter molecules reside in the matrix. In response to a force applied to the composition sufficient to break at least a portion of the microsphere structure, the fluorescent sensor compound and the organic reporter molecules are transformed into a non-reversible fluorescent state exhibiting a quantum yield greater than 0.2. The fluorescent state is objectively visually verifiable without physically contacting the composition.
15/ 898,906
February 19, 2018
1/1
C09K 11/07 (20060101)C09K 11/58 (20060101)C09K 11/60 (20060101)C09K 11/54 (20060101)B33Y 10/00 (20150101)C09B 15/00 (20060101)C09B 57/02 (20060101)C09B 6/00 (20060101)C07D 311/82 (20060101)C09B 57/14 (20060101)
GOVERNMENT INTEREST STATEMENT The United States Government has rights in this invention pursuant to Contract No. DE-AC04-94AL85000 between the United States Department of Energy and Sandia Corporation, and Contract No. DE-NA0003525 between the United States Department of Energy and National Technology & Engineering Solutions of Sandia, LLC, for the operation of the Sandia National Laboratories.