Highly fluorescent markers for fluids or articles
US8809067B2 · kind B2 · utility
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16References
7Claims
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Key dates
| Filing date | Oct 11, 2013 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Oct 11, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/172307
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides highly fluorescent markers, made from a reactive polymer and an isocyanate, that fluoresce in the ultraviolet or near infrared region without being visible to the human eye at low concentrations in the fluid or article being marked. The molecular weight and fluorescence emission wavelength of these highly fluorescent marker compounds can be adjusted to provide a multitude of markers with unique fluorescence signatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.