Fluorescent or phosphorescent composition
US6666991B1 · kind B1 · utility
24Cited by
6References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 29, 2001 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | May 29, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31819
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A fluorescent or luminous composition, comprising a multilayered film-coated powder having at least two coating films on a base particle, and a fluorescent or luminous substance; the composition, wherein at least one layer of the coating films contains the fluorescent or luminous substance; a genuine/counterfeit discrimination object, in which the fluorescent or luminous composition; and a genuine/counterfeit discrimination method, comprising recognizing fluorescence or luminescence by irradiating, with a light, the genuine/counterfeit discrimination object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.