Stable oil-in-water nanoemulsion containing upconverting nanoparticles
US11292933B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jan 15, 2019 |
| Grant date | Apr 5, 2022 |
| Priority date | — |
| Expiry date | Jun 14, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7773
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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)F4 nanoparticle, wherein RE is a lanthanide, yttrium, or a combination or mixture thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.