Patent US5264081A successfully refreshed from Google Patents.
US5264081A
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Forgery-proof safety paper
Assignee: Aussedat Rey SA
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Filing: 1990-05-24
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Granted: 1993-11-23
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Expires: 2010-05-24
Abstract
Abstract This invention relates to the paper-making domain and especially to a forgery-proof safety paper, which includes on its surface and/or in its mass, at least one compound responding to formula: ##STR1## in which: R 1 , R 2 , R 3 may be either H, OH, or OR, R being a hydrocarbon chain, substituted or not, straight, cyclic or aromatic, with A forming one or more cycles, substituted or not. This invention is particularly applicable to forgery-proof safety papers such as cheques or handwritten documents for payment.
Inventors
- 👤 Andre Honnorat
- 👤 Claude R. Riou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:31
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/44; D21H21/46; Y; Y10; Y10S; Y10S428/00; Y10S428/916
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A forgery-proof safety paper, comprising, on its surface and/or in its mass, at least one compound responding to formula: ##STR14## with: R 1 , R 2 , R 3 being either H, OH, or OR, R being a hydrocarbon chain, substituted or not, straight, rings or aromatic, with A forming one or more cycles, substituted or not wherein said at least one compound is not quinizarin, said forgery-proof safety paper being capable of reacting with a base or reducing agent to develop coloration.
Claim 2
Dependent Claim
83 words
A forgery-proof safety paper, comprising, on its surface and/or in its mass, at least one compound responding to formula: ##STR14## with: R 1 , R 2 , R 3 being either H, OH, or OR, R being a hydrocarbon chain, substituted or not, straight, rings or aromatic, with A forming one or more cycles, substituted or not wherein said at least one compound is not quinizarin, said forgery-proof safety paper being capable of reacting with a base or reducing agent to develop coloration.
Claim 3
Dependent Claim
42 words
The safety paper of claim 1, wherein the compound responding to formula (1) has the following structure: ##STR15## with: R 1 to R 6 being either H, OH or OR, R being a hydrocarbon chain, substituted or not, straight, cyclic or aromatic.
Claim 4
Dependent Claim
42 words
The safety paper of claim 1, wherein the compound responding to formula (1) has the following structure: ##STR16## with: R 1 to R 7 being either H, OH or OR, R being a hydrocarbon chain, substituted or not, straight, cyclic or aromatic.
Claim 5
Dependent Claim
16 words
The safety paper of claim 1, wherein the compound is selected from the following compounds: ##STR17##
Claim 6
Dependent Claim
16 words
The safety paper of claim 3, wherein the compound is selected from the following compounds: ##STR18##
Claim 7
Dependent Claim
21 words
The safety paper of claim 1, wherein the paper comprises at least 0.001 g/m 2 of the compound of formula (1).
Claim 8
Dependent Claim
23 words
The safety paper of claim 6, wherein the paper advantageously comprises between 0.005 and 0.10 g/m 2 of the compound of formula (1).
Claim 9
Independent Claim
107 words
A method of rendering a safety paper forgery-proof comprising the steps of providing nonforgery-proof paper; applying to said at least one compound selected from the group consisting of a coating binding, an additive, an organic solvent and at least one compound responding to formula: ##STR19## R 1 , R 2 , R 3 being either H, OH, or OR, R being a hydrocarbon chain, substituted or not, straight, rings or aromatic, with A forming one or more cycles, substituted or not wherein said at least one compound is not quinizarin, said forgery-proof safety paper being capable of reacting with a base or reducing agent to develop coloration.
Claim 10
Independent Claim
107 words
A method of rendering a safety paper forgery-proof comprising the steps of providing nonforgery-proof paper; applying to said at least one compound selected from the group consisting of a coating binding, an additive, an organic solvent and at least one compound responding to formula: ##STR19## R 1 , R 2 , R 3 being either H, OH, or OR, R being a hydrocarbon chain, substituted or not, straight, rings or aromatic, with A forming one or more cycles, substituted or not wherein said at least one compound is not quinizarin, said forgery-proof safety paper being capable of reacting with a base or reducing agent to develop coloration.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-11-22 | 1997-05-24 | 1997-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-22 | 2001-05-24 | 2001-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-22 | 2005-05-24 | 2005-11-23 | $7700.00 | Window Closed / Lapsed |