Patent US6234537B1 successfully refreshed from Google Patents.
US6234537B1
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Security document with optically excitable dyes for authenticity check
Assignee: Bundesdruckerei GmbH
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Filing: 1999-08-13
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Granted: 2001-05-22
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Expires: 2019-08-13
Abstract
Abstract A security document with optically excitable dyes for authenticity checking. Dyes are applied to or embedded in the security documents. The dyes are advantageously embedded in a carrier material which in conjunction with the dyes forms a laser-active element. Certain optically excitable dyes are incorporated in a security document in such a way that when the security and/or sensitive document is optically excited, the dyes embedded in the security and/or sensitive document resonate with the material of the securities and secure documents, so that a well-defined narrow spectrum of all excited materials is emitted.
Inventors
- 👤 Roland Gutmann
- 👤 Benedikt Ahlers
- 👤 Frank Kappe
- 👤 Ralf Paugstadt
- 👤 Arnim Franz-Burgholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:37
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/20; B42D25/23; B42D25/29; B41; B41M; B41M3/00; B41M3/14; B41M5/00; B41M5/26; B41M5/28; B41M5/287; B42D2035/34
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
77 words
A security document comprising at least one optically excitable dye having a first emission characteristic for authenticity checking; a carrier material; the at least one optically excitable dye is embedded in the carrier material and, in conjunction with the carrier material, forms a laser-active element; and wherein the at least one dye is embedded in a resonator comprising a coating of reflecting layers disposed on both sides of the carrier material containing the at least one dye.
Claim 2
Dependent Claim
77 words
A security document comprising at least one optically excitable dye having a first emission characteristic for authenticity checking; a carrier material; the at least one optically excitable dye is embedded in the carrier material and, in conjunction with the carrier material, forms a laser-active element; and wherein the at least one dye is embedded in a resonator comprising a coating of reflecting layers disposed on both sides of the carrier material containing the at least one dye.
Claim 3
Dependent Claim
75 words
A security document comprising two optically excitable dyes having each a different emission characteristic for authenticity checking; a carrier material; said two optically excitable dyes are each embedded in the carrier material and, in conjunction with the carrier material, form a laser-active element; and wherein the two optically excitable dyes are embedded in a resonator comprising a coating of reflecting layers disposed on both sides of the carrier material containing each of the two dyes.
Claim 4
Dependent Claim
75 words
A security document comprising two optically excitable dyes having each a different emission characteristic for authenticity checking; a carrier material; said two optically excitable dyes are each embedded in the carrier material and, in conjunction with the carrier material, form a laser-active element; and wherein the two optically excitable dyes are embedded in a resonator comprising a coating of reflecting layers disposed on both sides of the carrier material containing each of the two dyes.
Claim 5
Dependent Claim
23 words
The security document according to claim 1 , wherein the resonator includes geometry and material characteristics, whereby the security document can be identified.
Claim 6
Dependent Claim
34 words
The security document according to claim 3 , wherein the at least one dye is directly incorporated in a layer of the security document and the reflecting layers form part of the security document.
Claim 7
Dependent Claim
43 words
The security document according claim 4 , further comprising pigment platelets including a carrier layer doped with laser dye and two mutually parallel reflecting layers disposed on both sides of the carrier layer and wherein the dyes are bedded in the pigment platelets.
Claim 8
Dependent Claim
36 words
The security document according to claim 4 , wherein the at least one dye is embedded in pigment spheres including a carrier material doped with the laser dye and a reflecting layer surrounding the carrier material.
Claim 9
Dependent Claim
27 words
The security document according to claim 6 , wherein the carrier material is a material that is transparent for both an exciting wavelength and an emitted wavelength.
Claim 10
Dependent Claim
28 words
The security document according to claim 7 , further comprising pigment particles, and wherein the at least one dye, pigment platelets, pigment particles are micro-encapsulated in a materials.
Claim 11
Dependent Claim
28 words
The security document according to claim 8 , wherein the at least one dye, pigment platelets and pigment particles are incorporated in color components of a printing ink.
Claim 12
Dependent Claim
30 words
The security document according to claim 9 , wherein the document comprised paper and wherein the at least one dye, pigment platelets and pigment particles are incorporated in the paper.
Claim 13
Dependent Claim
35 words
The security document according to claim 9 , wherein the document comprises paper having a plastic substrate and wherein the at least one dye, pigment platelets and pigment particles are incorporated in the plastic substrate.
Claim 14
Dependent Claim
33 words
The security document according to 9 , wherein the document comprised paper including paper additives and wherein the at least one dye, pigment platelets and pigment particles are incorporated in the paper additives.
Claim 15
Dependent Claim
33 words
The security document according to 9 , wherein the document comprised paper including paper additives and wherein the at least one dye, pigment platelets and pigment particles are incorporated in the paper additives.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-05-21 | 2004-11-20 | 2005-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-21 | 2008-11-20 | 2009-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-21 | 2012-11-20 | 2013-05-22 | $7700.00 | Window Closed / Lapsed |