Fluorescent substance, fluorescent composition, fluorescent mark carrier and optical reader therefor
US6688789B2 · kind B2 · utility
1Cited by
27References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Dec 19, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7777
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An inked ribbon containing a tape-like carrier deposited with a fluorescent composition that contains a fluorescent substance containing at least one of Nd and Yb as an optical active element and, other than this optical active element, at least one oxide of one of Mo and W and an alkaline earth metal, which fluorescent substance is dispersed and retained in an organic binder, wherein the organic binder is a mixture of wax and resin, and wherein the fluorescent substance has an average particle size of not more than 1 micron.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.