Highly fluorescent markers for fluids or articles
US8486711B2 · kind B2 · utility
0Cited by
20References
18Claims
0Family size
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Inventor
Key dates
| Filing date | Oct 22, 2004 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Oct 27, 2029 |
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.