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:
Apr. 05, 2022
Filed:
Jan. 15, 2019
Applicant:
South Dakota Board of Regents, Pierre, SD (US);
Inventors:
William Cross, Rapid City, SD (US);
Jeevan Meruga, Rapid City, SD (US);
Jon Kellar, Rapid City, SD (US);
P. Stanley May, Vermillion, SD (US);
Aravind Baride, Vermillion, SD (US);
Assignee:
SOUTH DAKOTA BOARD OF REGENTS, Pierre, SD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/77 (2006.01); C09D 11/50 (2014.01); C09D 11/023 (2014.01); C09D 11/037 (2014.01); C09D 11/322 (2014.01); C09D 11/38 (2014.01); B41M 3/14 (2006.01);
U.S. Cl.
CPC ...
C09D 11/50 (2013.01); B41M 3/144 (2013.01); C09D 11/023 (2013.01); C09D 11/037 (2013.01); C09D 11/322 (2013.01); C09D 11/38 (2013.01); C09K 11/7773 (2013.01);
Abstract
The present technology relates generally to a stable oil-in-water emulsion containing upconverting nanoparticles. In particular, the present technology relates to an ink formulation comprising a stable oil-in-water emulsion of upconverting nanoparticles useful for security printing. Preferably the upconverting nanoparticles comprise a β-Na(RE)Fnanoparticle, wherein RE is a lanthanide, yttrium, or a combination or mixture thereof.