US4522429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of rendering documents resistant to photocopying, and anti-copying paper and ink therefor
Assignee: NOCOPI Inc
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Filing: 1982-11-23
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Granted: 1985-06-11
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Expires: 2002-11-23
Abstract
Abstract Confidential information is printed, typed or otherwise applied to paper with a color having a reflection spectral response or less than about 10% for light with a wave-length below about 600 millimicrons. The color is sufficiently contrasting with the information to enable the information to be read by the human eye when the document is viewed under white light, but the document cannot be successfully photocopied.
Inventors
- 👤 Norman A. Gardner
- 👤 Michael P. Voticky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:30
CPC Classifications
B; B41; B41M; B41M3/00; B41M3/14; G; G03; G03C; G03C5/00; G03C5/08; G03G; G03G21/00; G03G21/04; G03G21/043; G03G8/00; Y; Y10; Y10S; Y10S283/00; Y10S283/902; Y10S428/00; Y10S428/913; Y10S428/916; Y10S430/00; Y10S430/151; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876; Y10T428/24893; Y10T428/24901; Y10T428/24934; Y10T428/24942; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
75 words
A document having information appearing thereon, with at least a portion of the information being located on a portion of the document which is of a colour having a reflection spectral response of less than about 10% for light with a wave-length below about 600 millimicrons and yet which is sufficiently visually contrasting with the information to enable the information to be read by the human eye when the document is viewed under white light.
Claim 2
Dependent Claim
75 words
A document having information appearing thereon, with at least a portion of the information being located on a portion of the document which is of a colour having a reflection spectral response of less than about 10% for light with a wave-length below about 600 millimicrons and yet which is sufficiently visually contrasting with the information to enable the information to be read by the human eye when the document is viewed under white light.
Claim 3
Dependent Claim
28 words
A document according to claim 1 wherein the colour has a reflection spectral response of less than about 10% for light with a wave-length below about 620 millimicrons.
Claim 4
Dependent Claim
28 words
A document according to claim 1 wherein the colour has a reflection spectral response of less than about 10% for light with a wave-length below about 650 millimicrons.
Claim 5
Dependent Claim
27 words
A document according to claim 1 wherein the colour has a reflection spectral response of substantially zero for light with a wave-length less tha about 620 millimicrons.
Claim 6
Dependent Claim
25 words
A document according to claim 1 wherein the document comprises a paper substrate with ink of said colour applied over said portion of the document.
Claim 7
Dependent Claim
17 words
A document according to claim 5 wherein the paper substrate is white and the information is black.
Claim 8
Dependent Claim
24 words
A document according to claim 1 wherein the document comprises paper coloured during manufacture to provide said colour to said portion of the document.
Claim 9
Dependent Claim
11 words
A document according to claim 7 wherein the information is black.
Claim 10
Dependent Claim
37 words
A document according to claim 1 wherein the document comprises a paper substrate with the information appearing thereon, and a transparent film of said colour is secured to the paper substrate over said portion of the document.
Claim 11
Dependent Claim
16 words
A document according to claim 9 wherein the transparent film comprises a plurality of superposed layers.
Claim 12
Dependent Claim
90 words
A document according to claim 10 wherein the transparent film comprises a first layer with a transmission spectral response which is less than about 10% at a wave-length at about 600 millimicrons and rises to about 75% at a wave-length of about 650 millimicrons, and a second layer with a transmission spectral response of about 50% for wave-length from about 600 to about 700 millimicrons, the first and second layers providing a reflection spectral response of less than about 10% for light with a wave-length less than about 600 millimicrons.
Claim 13
Dependent Claim
16 words
A document according to claim 9 wherein the paper is white and the information is black.
Claim 14
Independent Claim
79 words
A method of rendering a document with information thereon resistant to photocopying, said method comprising providing a portion of the document carrying at least a portion of the information with a colour having a reflection spectral response of less than about 10% for light with a wave-length below about 600 millimicrons and yet which is sufficiently contrasting with the information to enable the information to be read by the human eye when the document is viewed under white light.
Claim 15
Independent Claim
79 words
A method of rendering a document with information thereon resistant to photocopying, said method comprising providing a portion of the document carrying at least a portion of the information with a colour having a reflection spectral response of less than about 10% for light with a wave-length below about 600 millimicrons and yet which is sufficiently contrasting with the information to enable the information to be read by the human eye when the document is viewed under white light.
Claim 16
Dependent Claim
28 words
A method according to claim 13 wherein the colour has a reflection spectral response of less than about 10% for light with a wave-length below about 620 millimicrons.
Claim 17
Dependent Claim
28 words
A method according to claim 13 wherein the colour has a reflection spectral response of less than about 10% for light with a wave-length below about 650 millimicrons.
Claim 18
Dependent Claim
27 words
A method according to claim 13 wherein the reflection spectral response of said colour is substantially zero for light with a wave-length less than about 620 millimicrons.
Claim 19
Dependent Claim
30 words
A method according to claim 13 wherein said portion of the document is provided with said colour by applying an ink of said colour over said portion of the document.
Claim 20
Dependent Claim
16 words
A method according to claim 17 wherein the paper is white and the information is black.
Claim 21
Dependent Claim
22 words
A method according to claim 13 wherein said portion of the document is provided with said colour during manufacture of the paper.
Claim 22
Dependent Claim
11 words
A method according to claim 19 wherein the information is black.
Claim 23
Dependent Claim
31 words
A method according to claim 13 wherein said portion of the document is provided with said colour by laying a transparent film of said colour over said portion of the document.
Claim 24
Dependent Claim
19 words
A method according to claim 21 wherein the transparent film of said colour over said portion of the document.
Claim 25
Dependent Claim
16 words
A method according to claim 21 wherein the transparent film comprises a plurality of superposed layers.
Claim 26
Dependent Claim
89 words
A method according to claim 23 wherein the transparent film comprises a first layer with a transmission spectral response which is less than about 10% at a wave-length at about 600 millimicrons and rises to about 75% at a wave-length of about 650 millimicrons, and a second layer with transmission spectral response of about 50% for wave-length from about 600 to about 700 millimicrons, the first and second layers providing a reflection spectral response of less than about 10% for light with a wave-length less than about 650 millimicrons.
Claim 27
Dependent Claim
62 words
Anti-photocopying paper having a colour with a reflection spectral response of less than about 10% for light with a wave-length below about 600 millimicrons and yet which is sufficiently visually contrasting with information, when said information is typed thereon or otherwise applied thereto, to enable said information to be read by the human eye when the paper is viewed under white light.
Claim 28
Dependent Claim
62 words
Anti-photocopying paper having a colour with a reflection spectral response of less than about 10% for light with a wave-length below about 600 millimicrons and yet which is sufficiently visually contrasting with information, when said information is typed thereon or otherwise applied thereto, to enable said information to be read by the human eye when the paper is viewed under white light.
Claim 29
Dependent Claim
28 words
Anti-photocopying paper according to claim 25 wherein said colour has a reflection spectral response of less than about 10% for light with a wave-length below about 620 millimicrons.
Claim 30
Dependent Claim
28 words
Anti-photocopying paper according to claim 25 wherein the colour has a reflection spectral response of less than about 10% for light with a wave-length below about 650 millimicrons.
Claim 31
Dependent Claim
27 words
Anti-photocopying paper according to claim 25 wherein the colour has a reflection spectral response of substantially zero for light with a wave-length less than about 620 millimicrons.
Claim 32
Dependent Claim
20 words
Anti-photocopying paper according to claim 25 comprising a white paper substrate to which ink of said colour has been applied.
Claim 33
Dependent Claim
15 words
Anti-photocopying paper according to claim 25 to which said colour has been applied during manufacture.
Claim 34
Dependent Claim
22 words
Anti-photocopying paper according to claim 25 comprising a white paper substrate to which a transparent film of said colour has been applied.
Claim 35
Dependent Claim
16 words
Anti-photocopying paper according to claim 31 wherein the transparent film comprises a plurality of superposed layers.
Claim 36
Dependent Claim
108 words
Anti-photocopying paper according to claim 32 wherein the transparent film comprises a first layer with a transmission spectral response which is less than about 10% at a wave-length at about 600 millimicrons and rises to about 75% at a wave-length of about 650 millimicrons, and a second layer with a transmission spectral response of about 50% for wave-length of about 650 millimicrons, and a second layer with a transmission spectral response of about 50% for wavelength from about 600 to about 700 millimicrons, the first and second layers providing a reflection spectral response of less than about 10% for light with a wavelength less than about 650 millimicrons.
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) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |