发明名称 |
SECURITY FEATURE FOR VALUE DOCUMENTS |
摘要 |
The present invention relates to a security feature for security papers, value documents and the like having an acid-labile feature substance as the core and a shell consisting substantially of metal oxide, the security feature exhibiting greater stability against the action of acids compared with the acid-labile feature substance. |
申请公布号 |
EP1846898(A2) |
申请公布日期 |
2007.10.24 |
申请号 |
EP20050817917 |
申请日期 |
2005.12.15 |
申请人 |
GIESECKE & DEVRIENT GMBH |
发明人 |
HOPPE, RAINER;GIERING, THOMAS |
分类号 |
G07D7/00;B41M3/14;B42D15/00;B42D15/10;C09C1/00;C09K11/02;D21H21/40 |
主分类号 |
G07D7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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