Patent US4725497A successfully refreshed from Google Patents.
US4725497A
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Unfalsifiable safety paper
Assignee: LANA MANUFACTURE DE PAPIER
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Filing: 1986-01-17
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Granted: 1988-02-16
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Expires: 2006-01-17
Abstract
Abstract This invention relates to an unfalsifiable safety paper comprising on its surface and/or in its mass, at least one compound responding to formula: ##STR1## in which: R corresponds to hydrogen, to an alkyl group of C 1 to C 8 , substituted or not, to a non-substituted, N-substituted or N,N-substituted amine group, to NO 2 , to a halogen; n is equal to 0 or 1. The invention is applicable to handwritten pieces for payment.
Inventors
- 👤 Andre Honnorat
- 👤 Claude Riou
- 👤 Louis Raux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:41
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/44; D21H21/46; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10S428/915; Y10T; Y10T428/00; Y10T428/25; Y10T428/27; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
53 words
An unfalsifiable safety paper including at least one compound having the formula: ##STR14## wherein R is selected from the group consisting of hydrogen, C 1 to C 8 alkyl, substituted C 1 to C 8 alkyl, amine, N-substituted amine, NN-substituted amine, NO 2 , and halogens, and wherein N is 0 or 1.
Claim 2
Dependent Claim
53 words
An unfalsifiable safety paper including at least one compound having the formula: ##STR14## wherein R is selected from the group consisting of hydrogen, C 1 to C 8 alkyl, substituted C 1 to C 8 alkyl, amine, N-substituted amine, NN-substituted amine, NO 2 , and halogens, and wherein N is 0 or 1.
Claim 3
Dependent Claim
20 words
The unfalsifiable safety paper of claim 1 wherein said compound I is provided on the surface of said safety paper.
Claim 4
Dependent Claim
56 words
The unfalsifiable safety paper of claim 1 wherein said compound I has the following structure: ##STR15## wherein R is selected from the group consisting of hydrogen, alkyl, substituted alkyl, NH 2 , NHR', NR'R", halogen, and NO 2 , and wherein R' and R" are selected from the group consisting of alkyl, aryl, and substituted aryl.
Claim 5
Dependent Claim
34 words
The unfalsifiable safety paper of claim 3 wherein said substituted aryl groups comprising R' and R" comprise aryl groups substituted with a compound selected from the group consisting of CN and NO 2 .
Claim 6
Dependent Claim
15 words
The unfalsifiable safety paper of claim 1 wherein said compound I has the formula: ##STR16##
Claim 7
Dependent Claim
15 words
The unfalsifiable safety paper of claim 1 wherein said compound I has the formula: ##STR17##
Claim 8
Dependent Claim
19 words
The unfalsifiable safety paper of claim 3 wherein said compound I is selected from the group consisting of: ##STR18##
Claim 9
Dependent Claim
19 words
The unfalsifiable safety paper of claim 6 wherein said compound I is selected from the group consisting of: ##STR19##
Claim 10
Dependent Claim
24 words
The unfalsifiable safety paper of claim 1 wherein said compound I is present in an amount of at least about 0.001 g/m 2 .
Claim 11
Dependent Claim
29 words
The unfalsifiable safety paper of claim 1 comprising an aqueous composition including said compound I and a coating binder on at least one of the surfaces of said paper.
Claim 12
Dependent Claim
17 words
The unfalsifiable safety paper of claim 10 comprising said aqueous composition on both surfaces of said paper.
Claim 13
Dependent Claim
14 words
The unfalsifiable safety paper of claim 10 wherein said aqueous composition includes a surfactant.
Claim 14
Dependent Claim
24 words
The unfalsifiable safety paper of claim 12 wherein said aqueous composition comprises from about 0.5 to 50 grams per liter of said compound I.
Claim 15
Dependent Claim
39 words
The unfalsifiable safety paper of claim 13, wherein said aqueous composition further comprises from about 10 to about 150 grams per liter of said coating binder, and from about 5 to about 50 grams per liter of said surfactant.
Claim 16
Dependent Claim
16 words
The unfalsifiable safety paper of claim 14 wherein said aqueous composition further comprises an additional adjuvant.
Claim 17
Dependent Claim
61 words
The unfalsifiable safety paper of claim 14 wherein said compound I has the formula: ##STR20## wherein R selects from the group consisting of hydrogen, alkyl, substituted alkyl, NH 2 , NHR', NR'R", halogen, and NO 2 , wherein R' and R" are selected from the group consisting of alkyl, aryl, and substituted aryl, and wherein said surfactant comprises a neutral surfactant.
Claim 18
Dependent Claim
23 words
The unfalsifiable safety paper of claim 14 wherein said compound I has the formula: ##STR21## and wherein said surfactant comprises a cationic surfactant.
Claim 19
Dependent Claim
23 words
The unfalsifiable safety paper of claim 1 comprising an organic composition including said compound I on at least one surface of said paper.
Claim 20
Dependent Claim
16 words
The unfalsifiable safety paper of claim 18 wherein said organic composition includes a compatible coating binder.
Claim 21
Dependent Claim
17 words
The unfalsifiable safety paper of claim 19 comprising said organic composition on both sides of said paper.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |