| 申请日期 | 2025-07-21 | 申请号 | US11645463 |
| 公开（公告）号 | US7625500B2 | 公开（公告）日 | 2009-12-01 |
| 公开国别 | US | 申请人省市代码 | 全国 |
| 申请人 | Joseph D Roth | ||
| 简介 | A security feature having unique photoluminescent properties and a method for making the security feature. The security feature includes a silica carrier and a rare earth dopant dispersed throughout at least a portion of the silica carrier. The rare earth dopant includes a rare earth ion to which ligands and/or inorganic sensitizers are associated. The ligands and/or inorganic sensitizers are positioned to absorb energy and transfer the absorbed energy to the rare earth ion. | ||
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