Title:
SECURITY ELEMENT
Document Type and Number:
WIPO Patent Application WO2004028824
Kind Code:
A3
Abstract:
The invention relates to a valuable object comprising a security element which is provided with at least one first and one second liquid crystalline material. The first material has thermochromic properties while the second material has an optically variable effect.
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Inventors:
MENGEL CHRISTOPH (DE)
GACESA DESANKA (DE)
VOIT MAX (DE)
GACESA DESANKA (DE)
VOIT MAX (DE)
Application Number:
PCT/EP2003/010426
Publication Date:
August 05, 2004
Filing Date:
September 18, 2003
Export Citation:
Assignee:
GIESECKE & DEVRIENT GMBH (DE)
MENGEL CHRISTOPH (DE)
GACESA DESANKA (DE)
VOIT MAX (DE)
MENGEL CHRISTOPH (DE)
GACESA DESANKA (DE)
VOIT MAX (DE)
International Classes:
B42D15/10; B42D15/00; (IPC1-7): B42D15/00; B42D15/10
Domestic Patent References:
| WO2000050249A1 | 2000-08-31 | |||
| WO2001016426A1 | 2001-03-08 | |||
| WO2000054985A1 | 2000-09-21 |
Foreign References:
| EP0608078A1 | 1994-07-27 | |||
| EP0435029A2 | 1991-07-03 | |||
| EP0899119A1 | 1999-03-03 | |||
| DE10023004A1 | 2001-11-22 |
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